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General Description
The MAX30100 is an integrated pulse oximetry and heartrate
monitor sensor solution. It combines two LEDs, a
photodetector, optimized optics, and low-noise analog
signal processing to detect pulse oximetry and heart-rate
signals.
The MAX30100 operates from 1.8V and 3.3V power supplies
and can be powered down through software with
negligible standby current, permitting the power supply to
remain connected at all times.
Applications
●● Wearable Devices
●● Fitness Assistant Devices
●● Medical Monitoring Devices
Benefits and Features
●● Complete Pulse Oximeter and Heart-Rate Sensor
Solution Simplifies Design
• Integrated LEDs, Photo Sensor, and
High-Performance Analog Front -End
• Tiny 5.6mm x 2.8mm x 1.2mm 14-Pin Optically
Enhanced System-in-Package
●● Ultra-Low-Power Operation Increases Battery Life for
Wearable Devices
• Programmable Sample Rate and LED Current for
Power Savings
• Ultra-Low Shutdown Current (0.7μA, typ)
●● Advanced Functionality Improves Measurement
Performance
• High SNR Provides Robust Motion Artifact Resilience
• Integrated Ambient Light Cancellation
• High Sample Rate Capability
• Fast Data Output Capability
Ordering Information appears at end of data sheet.
19-7065; Rev 0; 9/14
ADC
CONTROL SIGNAL
PROCESSING
COVER GLASS
10
0.1
RED IR
HbO2
Hb
NO INK
MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
System Block Diagram
EVALUATION KIT AVAILABLE
VDD to GND..........................................................-0.3V to +2.2V
GND to PGND.......................................................-0.3V to +0.3V
x_DRV, x_LED+ to PGND.....................................-0.3V to +6.0V
All Other Pins to GND...........................................-0.3V to +6.0V
Output Short-Circuit Current Duration........................Continuous
Continuous Input Current into Any Terminal.....................±20mA
Continuous Power Dissipation (TA = +70°C)
OESIP (derate 5.8mW/°C above +70°C).....................464mW
Operating Temperature Range............................ -40°C to +85°C
Soldering Temperature (reflow)........................................+260°C
Storage Temperature Range............................. -40°C to +105°C
OESIP
Junction-to-Ambient Thermal Resistance (θJA).........150°C/W
Junction-to-Case Thermal Resistance (θJC)..............170°C/W
(Note 1)
(VDD = 1.8V, VIR_LED+ = VR_LED+ = 3.3V, TA = +25°C, min/max are from TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Power-Supply Voltage VDD Guaranteed by RED and IR count tolerance 1.7 1.8 2.0 V
LED Supply Voltage
(R_LED+ or IR_LED+ to PGND) VLED+ Guaranteed by PSRR of LED Driver 3.1 3.3 5.0 V
Supply Current IDD
SpO2 and heart rate modes,
PW = 200μs, 50sps 600 1200
μA
Heart rate only mode,
PW = 200μs, 50sps 600 1200
Supply Current in Shutdown ISHDN TA = +25°C, MODE = 0x80 0.7 10 μA
SENSOR CHARACTERISTICS
ADC Resolution 14 bits
Red ADC Count
(Note 3) REDC
Propriety ATE setup
RED_PA = 0x05, LED_PW = 0x00,
SPO2_SR = 0x07, TA = +25°C
23,000 26,000 29,000 Counts
IR ADC Count
(Note 3) IRC
Propriety ATE setup
IR_PA = 0x09, LED_PW = 0x00,
SPO2_SR = 0x07, TA = +25°C
23,000 26,000 29,000 Counts
Dark Current Count DCC
RED_PA = IR_PA = 0x00,
LED_PW = 0x03, SPO2_SR = 0x01 0 3 Counts
DC Ambient Light Rejection
(Note 4) ALR
Number of ADC counts with
finger on sensor under direct
sunlight (100K lux)
LED_PW = 0x03,
SPO2_SR = 0x01
RED LED 0
Counts
IR LED 0
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Absolute Maximum Ratings
Package Thermal Characteristics
Electrical Characteristics
(VDD = 1.8V, VIR_LED+ = VR_LED+ = 3.3V, TA = +25°C, min/max are from TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IR ADC Count—PSRR (VDD) PSRRVDD
Propriety ATE setup
1.7V < VDD < 2.0V,
LED_PW = 0x03, SPO2_SR = 0x01,
IR_PA = 0x09, IR_PA = 0x05, TA = +25°C
0.25 2 %
Frequency = DC to 100kHz, 100mVP-P 10 LSB
RED/IR ADC Count—PSRR
(X_LED+) PSRRLED
Propriety ATE setup
3.1V < X_LED+ < 5V,
LED_PW = 0x03, SPO2_SR = 0x01,
IR_PA = 0x09, IR_PA = 0x05, TA = +25°C
0.05 2 %
Frequency = DC to 100kHz, 100mVP-P 10 LSB
ADC Integration Time INT
LED_PW = 0x00 200 μs
LED_PW = 0x03 1600 μs
IR LED CHARACTERISTICS (Note 4)
LED Peak Wavelength λP ILED = 20mA, TA = +25°C 870 880 900 nm
Full Width at Half Max Δλ ILED = 20mA, TA = +25°C 30 nm
Forward Voltage VF ILED = 20mA, TA = +25°C 1.4 V
Radiant Power PO ILED = 20mA, TA = +25°C 6.5 mW
RED LED CHARACTERISTICS (Note 4)
LED Peak Wavelength λP ILED = 20mA, TA = +25°C 650 660 670 nm
Full Width at Half Max Δλ ILED = 20mA, TA = +25°C 20 nm
Forward Voltage VF ILED = 20mA, TA = +25°C 2.1 V
Radiant Power PO ILED = 20mA, TA = +25°C 9.8 mW
TEMPERATURE SENSOR
Temperature ADC Acquisition
Time TT TA = +25°C 29 ms
Temperature Sensor Accuracy TA TA = +25°C ±1 °C
Temperature Sensor Minimum
Range TMIN -40 °C
Temperature Sensor Maximum
Range TMAX 85 °C
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Electrical Characteristics (continued)
(VDD = 1.8V, VIR_LED+ = VR_LED+ = 3.3V, TA = +25°C, min/max are from TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
Note 2: All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by Maxim
Integrated’s bench or proprietary automated test equipment (ATE) characterization.
Note 3: Specifications are guaranteed by Maxim Integrated’s bench characterization and by 100% production test using proprietary
ATE setup and conditions.
Note 4: For design guidance only. Not production tested.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL CHARACTERISTICS (SDA, SDA, INT)
Output Low Voltage SDA, INT VOL ISINK = 6mA 0.4 V
I2C Input Voltage Low VIL_I2C SDA, SCL 0.4 V
I2C Input Voltage High VIH_I2C SDA, SCL 1.4 V
Input Hysteresis VHYS SDA, SCL 200 mV
Input Capacitance CIN SDA, SCL 10 pF
Input Leakage Current IIN
VIN = 0V, TA = +25°C
(SDA, SCL, INT) 0.01 1 μA
VIN = 5.5V, TA = +25°C
(SDA, SCL, INT) 0.01 1 μA
I2C TIMING CHARACTERISTICS (SDA, SDA, INT)
I2C Write Address AE Hex
I2C Read Address AF Hex
Serial Clock Frequency fSCL 0 400 kHz
Bus Free Time Between STOP
and START Conditions tBUF 1.3 μs
Hold Time (Repeated) START
Condition tHD,START 0.6 μs
SCL Pulse-Width Low tLOW 1.3 μs
SCL Pulse-Width High tHIGH 0.6 μs
Setup Time for a Repeated START
Condition tSU,START 0.6 μs
Data Hold Time tHD,DAT 0 900 ns
Data Setup Time tSU,DAT 100 ns
Setup Time for STOP Condition tSU,STOP 0.6 μs
Pulse Width of Suppressed Spike tSP 0 50 ns
Bus Capacitance CB 400 pF
SDA and SCL Receiving Rise
Time tR 20 + 0.1CB 300 ns
SDA and SCL Receiving Fall Time tRF 20 + 0.1CB 300 ns
SDA Transmitting Fall Time tTF 20 + 0.1CB 300 ns
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Electrical Characteristics (continued)
Figure 1. I2C-Compatible Interface Timing Diagram
SDASCLtHD,STASTART CONDITIONtRtFtLOWtSU,DATtHD,DATtSU,STAtHD,STAREPEATED START CONDITIONtSPtSU,STOtBUFSTOPCONDITIONSTARTCONDITIONtHIGH
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
(VDD = 1.8V, VIR_LED+ = VR_LED+ = 3.3V, TA = +25°C, unless otherwise noted.)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0.00 0.50 1.00 1.50 2.00 2.50
SUPPLY CURRENT (mA)
SUPPLY VOLTAGE (V)
VDD SUPPLY CURRENT vs.
SUPPLY VOLTAGE toc03
MODE 0
MODE 2
MODE 3
0.04
0.05
0.06
0.07
0.08
0.09
0 10 20 30 40 50 60 70
DRV PIN COMPLIANCE VOLTAGE (V)
LED PULSE CURRENT (mA)
IR LED SUPPLY HEADROOM
(-10% CURRENT)
toc02
TA = +25°C
0
10000
20000
30000
40000
50000
60000
70000
0 5 10 15 20
COUNTS (SUM)
DISTANCE (mm)
DC COUNTS vs. DISTANCE FOR
WHITE HIGH IMPACT STYRENE CARD toc04
RED
IR
MODE[2:0] = 011
SPO2_HI_RES_EN = 1
SPO2_ADC_RGE = 0
SPO2_SR[2:0] = 001
RED or IR_PA[3:0] =
0101
0
1
2
3
4
5
6
7
-50 0 50 100 150
VDD SHUTDOWN CURRENT (μA)
TEMPERATURE (°C)
VDD SHUTDOWN CURRENT
vs. TEMPERATURE
VDD = 1.7V
toc05
VDD = 2.0V
VDD = 1.8V
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
-50 0 50 100 150
LED SHUTDOWN CURRENT (μA)
TEMPERATURE (°C)
LED SHUTDOWN CURRENT
vs. TEMPERATURE
VDD = 3.1V
toc06
VDD = 3.6V
VDD = 3.3V
-4
-3
-2
-1
0
1
2
3
-40 10 60 110
TEMPERATURE ERROR (°C)
ACTUAL TEMPERATURE (°C)
ON-BOARD TEMPERATURE vs. ERROR
toc07
-20
0
20
40
60
80
100
120
500 600 700 800
NORMALIZE POWER (%)
WAVELENGTH (nm)
RED LED SPECTRA at +30°C
toc08
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0 10 20 30 40 50 60 70 80
DRV PIN COMPLIANCE VOLTAGE (V)
LED PULSE CURRENT (mA)
RED LED SUPPLY HEADROOM
(-10% CURRENT)
toc01
TA = +25°C
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Typical Operating Characteristics
(VDD = 1.8V, VIR_LED+ = VR_LED+ = 3.3V, TA = +25°C, unless otherwise noted.)
860
865
870
875
880
885
890
895
900
-40 10 60 110
PEAK WAVELENGTH (nm)
TEMPERATURE (°C)
IR LED WAVELENGTH vs. TEMPERATURE
AT LED CURRENT = 25mA
toc11
650
655
660
665
670
675
-40 10 60 110
PEAK WAVELENGTH (nm)
TEMPERATURE (°C)
RED LED WAVELENGTH vs. TEMPERATURE
AT LED CURRENT = 25mA
toc10
0
10
20
30
40
50
60
70
1.30 1.35 1.40 1.45 1.50 1.55
FORWARD CURRENT (mA)
FORWARD VOLTAGE (V)
RED LED FORWARD VOLTAGE vs.
FORWARD CURRENT toc12
0
10
20
30
40
50
60
70
80
1.70 1.80 1.90 2.00 2.10 2.20 2.30 2.40
FORWARD CURRENT (mA)
FORWARD VOLTAGE (V)
IR LED FORWARD VOLTAGE vs.
FORWARD CURRENT toc13
-20
0
20
40
60
80
100
120
700 800 900 1000
NORMALIZE POWER (%)
WAVELENGTH (nm)
IR LED SPECTRA at +30°C
toc09
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Typical Operating Characteristics (continued)
PIN NAME FUNCTION
1, 7, 8, 14 N.C. No Connection. Connect to PCB Pad for Mechanical Stability.
2 SCL I2C Clock Input
3 SDA I2C Clock Data, Bidirectional (Open-Drain)
4 PGND Power Ground of the LED Driver Blocks
5 IR_DRV IR LED Cathode and LED Driver Connection Point. Leave floating in circuit.
6 R_DRV Red LED Cathode and LED Driver Connection Point. Leave floating in circuit.
9 R_LED+ Power Supply (Anode Connection) for Red LED. Bypass to PGND for best performance.
Connected to IR_LED+ internally.
10 IR_LED+ Power Supply (Anode Connection) for IR LED. Bypass to PGND for best performance. Connected
to R_LED+ internally.
11 VDD Analog Power Supply Input. Bypass to GND for best performance.
12 GND Analog Ground
13 INT Active-Low Interrupt (Open-Drain)
N.C. 1
SCL 2
SDA 3
PGND 4
IR_DRV 5
R_DRV 6
N.C. 7
14 N.C.
13 INT
12 GND
11 VDD
10 IR_LED+
9 R_LED+
8 N.C.
MAX30100
SENSOR
LED
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Pin Description
Pin Configuration
660nm 880nm
ADC
AMBIENT LIGHT
CANCELLATION ANALOG
TEMP ADC
OSCILLATOR
DIGITAL
FILTER
DIGITAL
DATA
REGISTER
LED DRIVERS
I2C
COMMUNICATION
INT
SDA
SCL
R_LED+ IR_LED+ VDD
R_DRV IR_DRV GND PGND
RED IR
RED+IR
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Detailed Description
The MAX30100 is a complete pulse oximetry and heartrate
sensor system solution designed for the demanding
requirements of wearable devices. The MAX30100 provides
very small total solution size without sacrificing optical
or electrical performance. Minimal external hardware
components are needed for integration into a wearable
device.
The MAX30100 is fully configurable through software registers,
and the digital output data is stored in a 16-deep
FIFO within the device. The FIFO allows the MAX30100
to be connected to a microcontroller or microprocessor on
a shared bus, where the data is not being read continuously
from the device’s registers.
SpO2 Subsystem
The SpO2 subsystem in the MAX30100 is composed of
ambient light cancellation (ALC), 16-bit sigma delta ADC,
and proprietary discrete time filter.
The SpO2 ADC is a continuous time oversampling sigma
delta converter with up to 16-bit resolution. The ADC output
data rate can be programmed from 50Hz to 1kHz. The
MAX30100 includes a proprietary discrete time filter to
reject 50Hz/60Hz interference and low-frequency residual
ambient noise.
Temperature Sensor
The MAX30100 has an on-chip temperature sensor for
(optionally) calibrating the temperature dependence of the
SpO2 subsystem.
The SpO2 algorithm is relatively insensitive to the wavelength
of the IR LED, but the red LED’s wavelength is critical
to correct interpretation of the data. The temperature
sensor data can be used to compensate the SpO2 error
with ambient temperature changes.
LED Driver
The MAX30100 integrates red and IR LED drivers to drive
LED pulses for SpO2 and HR measurements. The LED
current can be programmed from 0mA to 50mA (typical
only) with proper supply voltage. The LED pulse width
can be programmed from 200μs to 1.6ms to optimize
measurement accuracy and power consumption based
on use cases.
Functional Diagram
Table 1. Register Maps and Descriptions
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REG
ADDR
POR
STATE
R/W
STATUS
Interrupt
Status
A_FULL
TEMP_
RDY
HR_RDY
SPO2_
RDY
PWR_
RDY
0x00
0X00
R
Interrupt Enable
ENB_A_FULL
ENB_TE
P_RDY
ENB_HR_RDY
ENB_S
O2_RDY
0x01
0X00
R/W
FIFO
FIFO Write Pointer
FIFO_WR_PTR[3:0]
0x02
0x00
R/W
Over Flow Counter
OVF_COUNTER[3:0]
0x03
0x00
R/W
FIFO Read Pointer
FIFO_RD_PTR[3:0]
0x04
0x00
R/W
FIFO Data Register
FIFO_DATA[7:0]
0x05
0x00
R/W
CONFIGURATION
Mode Configuration
SHDN
RESET
TEMP_EN
MODE[2:0]
0x06
0x00
R/W
SPO2 Configuration
SPO2_HI_
RES_EN
RESERVED
SPO2_SR[2:0]
LED_PW[1:0]
0x07
0x00
R/W
RESERVED
0x08
0x00
R/W
LED Configuration
RED_PA[3:0]
IR_PA[3:0]
0x09
0x00
R/W
RESERVED
0x0A
– 0x15
0x00
R/W
TEMPERATURE
Temp_Integer
TINT[7:0]
0x16
0x00
R/W
Temp_Fraction
TFRAC[3:0]
0x17
0x00
R/W
RESERVED
0x8D
0x00
R/W
PART ID
Revision ID
REV_ID[7:0]
0xFE
0xXX*
R
Part ID
PART_ID[7]
0xFF
0x11
R/W
*XX denotes any 2-digit hexidecimal number (00 to FF). Contact Maxim Integrated for the Revision ID number assigned for your product.www.maximintegrated.com Maxim Integrated │ 10
MAX30100Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Interrupt Status (0x00)
There are 5 interrupts and the functionality of each is exactly the same: pulling the active-low interrupt pin into its low state until the interrupt is cleared.
The interrupts are cleared whenever the interrupt status register is read, or when the register that triggered the interrupt is read. For example, if the SpO2 sensor triggers an interrupt due to finishing a conversion, reading either the FIFO data register or the interrupt register clears the interrupt pin (which returns to its normal high state), and also clears all the bits in the interrupt status register to zero.
Bit 7: FIFO Almost Full Flag (A_FULL)
In SpO2 and heart-rate modes, this interrupt triggers when the FIFO write pointer is the same as the FIFO read pointer minus one, which means that the FIFO has only one unwritten space left. If the FIFO is not read within the next conversion time, the FIFO becomes full and future data is lost.
Bit 6: Temperature Ready Flag (TEMP_RDY)
When an internal die temperature conversion is finished, this interrupt is triggered so the processor can read the temperature data registers.
Bit 5: Heart Rate Data Ready (HR_RDY)
In heart rate or SPO2 mode, this interrupt triggers after every data sample is collected. A heart rate data sample consists of one IR data point only. This bit is automatically cleared when the FIFO data register is read.
Bit 4: SpO2 Data Ready (SPO2_RDY)
In SpO2 mode, this interrupt triggers after every data sample is collected. An SpO2 data sample consists of one IR and one red data points. This bit is automatically cleared when the FIFO data register is read.
Bit 3: RESERVED
This bit should be ignored and always be zero in normal operation.
Bit 2: RESERVED
This bit should be ignored and always be zero in normal operation.
Bit 1: RESERVED
This bit should be ignored and always be zero in normal operation.
Bit 0: Power Ready Flag (PWR_RDY)
On power-up or after a brownout condition, when the supply voltage VDD transitions from below the UVLO voltage to above the UVLO voltage, a power-ready interrupt is triggered to signal that the IC is powered up and ready to collect data.
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REG
ADDR
POR
STATE
R/W
Interrupt
Status
A_FULL
TEMP_
RDY
HR_RDY
SPO2_
RDY
PWR_
RDY
0x00
0X00
R
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Interrupt Enable (0x01)
Each source of hardware interrupt, with the exception of power ready, can be disabled in a software register within the MAX30100 IC. The power-ready interrupt cannot be disabled because the digital state of the MAX30100 is reset upon a brownout condition (low power-supply voltage), and the default state is that all the interrupts are disabled. It is important for the system to know that a brownout condition has occurred, and the data within the device is reset as a result.
When an interrupt enable bit is set to zero, the corresponding interrupt appears as 1 in the interrupt status register, but the INT pin is not pulled low.
The four unused bits (B3:B0) should always be set to zero (disabled) for normal operation.
FIFO (0x02–0x05)
FIFO Write Pointer
The FIFO write pointer points to the location where the MAX30100 writes the next sample. This pointer advances for each sample pushed on to the FIFO. It can also be changed through the I2C interface when MODE[2:0] is nonzero.
FIFO Overflow Counter
When the FIFO is full, samples are not pushed on to the FIFO, samples are lost. OVF_COUNTER counts the number of samples lost. It saturates at 0xF. When a complete sample is popped from the FIFO (when the read pointer advances), OVF_COUNTER is reset to zero.
FIFO Read Pointer
The FIFO read pointer points to the location from where the processor gets the next sample from the FIFO via the I2C interface. This advances each time a sample is popped from the FIFO. The processor can also write to this pointer after reading the samples, which would allow rereading samples from the FIFO if there is a data communication error.
FIFO Data
The circular FIFO depth is 16 and can hold up to 16 samples of SpO2 channel data (Red and IR). The FIFO_DATA register in the I2C register map points to the next sample to be read from the FIFO. FIFO_RD_PTR points to this sample. Reading FIFO_DATA register does not automatically increment the register address; burst reading this register reads the same address over and over. Each sample is 4 bytes of data, so this register has to be read 4 times to get one sample.
The above registers can all be written and read, but in practice, only the FIFO_RD_PTR register should be written to in operation. The others are automatically incremented or filled with data by the MAX30100. When starting a new SpO2
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REG
ADDR
POR
STATE
R/W
Interrupt
Enable
ENB_A_FULL
ENB_TE
P_RDY
ENB_HR_RDY
ENB_S
O2_RDY
0x01
0X00
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REG
ADDR
POR
STATE
R/W
FIFO Write Pointer
FIFO_WR_PTR[3:0]
0x02
0x00
R/W
Over Flow Counter
OVF_COUNTER[3:0]
0x03
0x00
R/W
FIFO Read Pointer
FIFO_RD_PTR[3:0]
0x04
0x00
R/W
FIFO Data Register
FIFO_DATA[7:0]
0x05
0x00
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MAX30100Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
or heart-rate conversion, it is recommended to first clear the FIFO_WR_PTR, OVF_COUNTER, and FIFO_RD_PTR registers to all zeros (0x00) to ensure the FIFO is empty and in a known state. When reading the MAX30100 registers in one burst-read I2C transaction, the register address pointer typically increments so that the next byte of data sent is from the next register, etc. The exception to this is the FIFO data register, register 0x05. When reading this register, the address pointer does not increment, but the FIFO_RD_PTR does. So the next byte of data sent will represent the next byte of data available in the FIFO.
Reading from the FIFO
Normally, reading registers from the I2C interface autoincrements the register address pointer, so that all the registers can be read in a burst read without an I2C restart event. In the MAX30100, this holds true for all registers except for the FIFO_DATA register (0x05).
Reading the FIFO_DATA register does not automatically increment the register address; burst reading this register reads the same address over and over. Each sample is 4 bytes of data, so this register has to be read 4 times to get one sample.
The other exception is 0xFF, reading more bytes after the 0xFF register does not advance the address pointer back to 0x00, and the data read is not meaningful.
FIFO Data Structure
The data FIFO consists of a 16-sample memory bank that stores both IR and RED ADC data. Since each sample consists of one IR word and one RED word, there are 4 bytes of data for each sample, and therefore, 64 total bytes of data can be stored in the FIFO. Figure 2 shows the structure of the FIFO graphically.
The FIFO data is left-justified as shown in Table 1; i.e. the MSB bit is always in the bit 15 position regardless of ADC resolution.
Each data sample consists of an IR and a red data word (2 registers), so to read one sample requires 4 I2C byte reads in a row. The FIFO read pointer is automatically incremented after each 4-byte sample is read.
In heart-rate only mode, the 3rd and 4th bytes of each sample return zeros, but the basic structure of the FIFO remains the same.
Write/Read Pointers
Table 2. FIFO Data
Figure 2. Graphical Representation of the FIFO Data Register
ADC
RESOLUTION
IR
[15]
IR
[14]
IR
[13]
IR
[12]
IR
[11]
IR
[10]
IR
[9]
IR
[8]
IR
[7]
IR
[6]
IR
[5]
IR
[4]
IR
[3]
IR
[2]
IR
[1]
IR
[0]
16-bit
14-bit
12-bit
10-bit
IR[15:8]IR[7:0]RED[15:8]RED[7:0]NEWER SAMPLESOLDER SAMPLESREGISTER 0x05IR[15:8](START OF SAMPLE #2)
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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The locations to store new data, and the read pointer for reading data, are used to control the flow of data in the FIFO. The write pointer increments every time a new sample is added to the FIFO. The read pointer is incremented automatically every time a sample is read from the FIFO. To reread a sample from the FIFO, decrement its value by one and read the data register again.
The SpO2 write/read pointers should be cleared (back to 0x0) upon entering SpO2 mode or heart-rate mode, so that there is no old data represented in the FIFO. The pointers are not automatically cleared when changing modes, but they are cleared if VDD is power cycled so that the VDD voltage drops below its UVLO voltage.
Pseudo-Code Example of Reading Data from FIFO
First transaction: Get the FIFO_WR_PTR:
START;
Send device address + write mode
Send address of FIFO_WR_PTR;
REPEATED_START;
Send device address + read mode
Read FIFO_WR_PTR;
STOP;
The central processor evaluates the number of samples to be read from the FIFO:
NUM_AVAILABLE_SAMPLES = FIFO_WR_PTR – FIFO_RD_PTR
(Note: pointer wrap around should be taken into account)
NUM_SAMPLES_TO_READ = < less than or equal to NUM_AVAILABLE_SAMPLES >
Second transaction: Read NUM_SAMPLES_TO_READ samples from the FIFO:
START;
Send device address + write mode
Send address of FIFO_DATA;
REPEATED_START;
Send device address + read mode
for (i = 0; i < NUM_SAMPLES_TO_READ; i++) {
Read FIFO_DATA;
Save IR[15:8];
Read FIFO_DATA;
Save IR[7:0];
Read FIFO_DATA;
Save R[15:8];
Read FIFO_DATA;
Save R[7:0];
}
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MAX30100Pulse Oximeter and Heart-Rate Sensor IC
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Third transaction: Write to FIFO_RD_PTR register. If the second transaction was successful, FIFO_RD_PTR points to the next sample in the FIFO, and this third transaction is not necessary. Otherwise, the processor updates the
FIFO_RD_PTR appropriately, so that the samples are reread.
START;
Send device address + write mode
Send address of FIFO_RD_PTR;
Write FIFO_RD_PTR;
STOP;
Mode Configuration (0x06)
Bit 7: Shutdown Control (SHDN)
The part can be put into a power-save mode by setting this bit to one. While in power-save mode, all registers retain their values, and write/read operations function as normal. All interrupts are cleared to zero in this mode.
Bit 6: Reset Control (RESET)
When the RESET bit is set to one, all configuration, threshold, and data registers are reset to their power-on-state. The only exception is writing both RESET and TEMP_EN bits to one at the same time since temperature data registers 0x16 and 0x17 are not cleared. The RESET bit is cleared automatically back to zero after the reset sequence is completed.
Bit 3: Temperature Enable (TEMP_EN)
This is a self-clearing bit which, when set, initiates a single temperature reading from the temperature sensor. This bit is cleared automatically back to zero at the conclusion of the temperature reading when the bit is set to one in heart rate or SpO2 mode.
Bits 2:0: Mode Control
These bits set the operating state of the MAX30100. Changing modes does not change any other setting, nor does it erase any previously stored data inside the data registers.
Table 3. Mode Control
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REG
ADDR
POR
STATE
R/W
Mode Configuration
SHDN
RESET
TEMP_EN
MODE[2:0]
0x06
0x00
R/W
MODE[2:0]
MODE
000
Unused
001
Reserved
(Do not use)
010
HR only enabled
011
SPO2 enabled
100–111
Unused
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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SpO2 Configuration (0x07)
Bit 6: SpO2 High Resolution Enable (SPO2_HI_RES_EN)
Set this bit high. The SpO2 ADC resolution is 16-bit with 1.6ms LED pulse width.
Bit 5: Reserved. Set low (default).
Bit 4:2: SpO2 Sample Rate Control
These bits define the effective sampling rate, with one sample consisting of one IR pulse/conversion and one RED pulse/conversion.
The sample rate and pulse width are related, in that the sample rate sets an upper bound on the pulse width time. If the user selects a sample rate that is too high for the selected LED_PW setting, the highest possible sample rate will instead be programmed into the register.
Bits 1:0: LED Pulse Width Control
These bits set the LED pulse width (the IR and RED have the same pulse width), and therefore, indirectly set the integration time of the ADC in each sample. The ADC resolution is directly related to the integration time.
Table 4. SpO2 Sample Rate Control
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REG
ADDR
POR
STATE
R/W
SPO2
Configuration
SPO2_HI_
RES_EN
Reserved
SPO2_SR[2:0]
LED_PW[1:0]
0x07
0x00
R/W
SPO2_SR[2:0]
SAMPLES (PER SECOND)
000
50
001
100
010
167
011
200
100
400
101
600
110
800
111
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LED Configuration (0x09)
Bits 7:4: Red LED Current Control
These bits set the current level of the Red LED as in Table 6.
Bits 3:0: IR LED Current Control
These bits set the current level of the IR LED as in Table 6.
Table 5. LED Pulse Width Control
Table 6. LED Current Control
*Actual measured LED current for each part can vary widely due to the proprietary trim methodology.
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REG
ADDR
POR
STATE
R/W
LED Configuration
RED_PA[3:0]
IR_PA[3:0]
0x09
0x00
R/W
LED_PW[1:0]
PULSE WIDTH (μs)
ADC RESOLUTION (BITS)
00
200
13
01
400
14
10
800
15
11
1600
16
Red_PA[3:0] OR IR_PA[3:0]
TYPICAL LED CURRENT (mA)*
0000
0.0
0001
4.4
0010
7.6
0011
11.0
0100
14.2
0101
17.4
0110
20.8
0111
24.0
1000
27.1
1001
30.6
1010
33.8
1011
37.0
1100
40.2
1101
43.6
1110
46.8
1111
50.0
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Temperature Data (0x16–0x17)
REGISTERB7B6B5B4B3B2B1B0REGADDRPORSTATER/WTemp_IntegerTINT[7:0]0x160x00R/WTemp_FractionTFRAC[3:0]0x170x00R/W
Temperature Integer
The on-board temperature ADC output is split into two registers, one to store the integer temperature and one to store the fraction. Both should be read when reading the temperature data, and the following equation shows how to add the two registers together:
TMEASURED = TINTEGER + TFRACTION
This register stores the integer temperature data in two’s complement format, where each bit corresponds to degree Celsius.
Temperature Fraction
This register stores the fractional temperature data in increments of 0.0625NC (1/16th of a degree).
If this fractional temperature is paired with a negative integer, it still adds as a positive fractional value
(e.g., -128°C + 0.5°C = -127.5°C).
Table 7. Temperature Integer
REGISTER VALUE (hex)
TEMPERATURE (°C)
0x00
0
0x00
+1
...
...
0x7E
+126
0x7F
+127
0x80
-128
0x81
-127
...
...
0xFE
-2
0xFF
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MAX30100Pulse Oximeter and Heart-Rate Sensor IC
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Applications Information
Sampling Rate and Performance
The MAX30100 ADC is a 16-bit sigma delta converter. The ADC sampling rate can be configured from 50sps to 1ksps. The maximum sample rate for the ADC depends on the selected pulse width, which in turn, determines the ADC resolution. For instance, if the pulse width is set to 200μs, then the ADC resolution is 13 bits and all sample rates from 50sps to 1ksps are selectable. However, if the pulse width is set to 1600μs, then only sample rates of 100sps and 50sps can be set. The allowed sample rates for both SpO2 and HR mode are summarized in Table 8 and Table 9.
Power Considerations
The LEDs in MAX30100 are pulsed with a low duty cycle for power savings, and the pulsed currents can cause ripples in the LED power supply. To ensure these pulses do not translate into optical noise at the LED outputs, the power supply must be designed to handle peak LED current. Ensure that the resistance and inductance from the power supply (battery, DC/DC converter, or LDO) to the device LED+ pins is much smaller than 1Ω, and that there is at least 1μF of power-supply bypass capacitance to a low impedance ground plane. The decoupling capacitor should be located physically as close as possible to the MAX30100 device.
In the heart-rate only mode, the red LED is inactive, and only the IR LED is used to capture optical data and determine the heart rate. This mode allows power savings due to the red LED being off; in addition, the IR_LED+ power supply can be reduced to save power because the forward voltage of the IR LED is significantly less than that of the red LED.
The average IDD and LED current as function of pulse width and sampling rate is summarized in Table 10 to Table 13.
Table 8. SpO2 Mode (Allowed Settings)
Table 9. Heart-Rate Mode
(Allowed Settings)
SAMPLES (per second)
PULSE WIDTH (μs)
200
400
800
1600
50
O
O
O
O
100
O
O
O
O
167
O
O
O
200
O
O
O
400
O
O
600
O
800
O
1000
O
Resolution
(bits)
13
14
15
16
SAMPLES (per second)
PULSE WIDTH (μs)
200
400
800
1600
50
O
O
O
O
100
O
O
O
O
167
O
O
O
200
O
O
O
400
O
O
600
O
O
800
O
O
1000
O
O
Resolution
(bits)
13
14
15
16
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Hardware Interrupt
The active-low interrupt pin pulls low when an interrupt is triggered. The pin is open-drain and requires a pullup resistor or current source to an external voltage supply (up to +5V from GND). The interrupt pin is not designed to sink large currents, so the pullup resistor value should be large, such as 4.7kΩ.
The internal FIFO stores up to 16 samples, so that the system processor does not need to read the data after every sample. Temperature data may be needed to properly interpret SpO2 data, but the temperature does not need to be sampled very often—once a second or every few seconds should be sufficient. In heart-rate mode temperature information is not necessary.
Table 12. Heart-Rate Mode: Average IDD Current (μA) IR_PA = 0x3
Table 13. Heart-Rate Mode: Average LED Current (mA) IR_PA = 0x3
Table 10. SpO2 Mode: Average IDD Current (μA) R_PA = 0x3, IR_PA = 0x3
Table 11. SpO2 Mode: Average LED Current (mA) R_PA = 0x3, IR_PA = 0x3
SAMPLES (per second)
PULSE WIDTH (μs)
200
400
800
1600
50
608
616
633
667
100
617
634
669
740
167
628
658
716
831
200
635
670
739
876
400
671
740
878
600
707
810
800
743
881
1000
779
951
SAMPLES (per second)
PULSE WIDTH (μs)
200
400
800
1600
50
628
650
695
782
100
649
691
776
942
167
678
748
887
200
692
775
940
400
779
944
600
865
800
952
1000
1037
SAMPLES (per second)
PULSE WIDTH (μs)
200
400
800
1600
50
0.256
0.511
1.020
2.040
100
0.512
1.022
2.040
4.077
167
0.854
1.705
3.404
6.795
200
1.023
2.041
4.074
8.130
400
2.042
4.074
8.123
600
3.054
6.089
800
4.070
8.109
1000
5.079
10.11
SAMPLES (per second)
PULSE WIDTH (μs)
200
400
800
1600
50
0.667
1.332
2.627
5.172
100
1.26
2.516
4.96
9.766
167
2.076
4.145
8.173
200
2.491
4.93
9.687
400
4.898
9.765
600
7.319
800
9.756
1000
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Table 14. Red LED Current Settings vs. LED Temperature Rise
Figure 3. Timing for Data Acquisition and Communication When in SpO2 Mode
RED LED CURRENT SETTING
RED LED DUTY CYCLE
(% OF LED PULSE WIDTH
TO SAMPLE TIME)
ESTIMATED TEMPERATURE RISE
(ADD TO TEMPERATURE SENSOR
MEASUREMENT) (°C)
0001 (3.1mA) 8 0.1
1111 (35mA) 8 2
0001 (3.1mA) 16 0.3
1111 (35mA) 16 4
0001 (3.1mA) 32 0.6
1111 (35mA) 32 8
INT
I2C BUS
LED OUTPUTS
RED
IR
RED
IR
RED
IR
~
~
~
RED
IR
RED
IR
RED
IR
RED
IR
SAMPLE #1 SAMPLE #2 SAMPLE #3 SAMPLE #14 SAMPLE #15
1 4 5 6
TEMP SENSOR TEMPERATURE SAMPLE
2 3
29ms
15ms TO 300ms
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Timing for Measurements and Data Collection
Timing in SpO2 Mode
Table 15. Events Sequence for Figure 3 in SpO2 Mode
Figure 4. Timing for Data Acquisition and Communication When in Heart Rate Mode
EVENT DESCRIPTION COMMENTS
1 Enter into SpO2 mode. Initiate a temperature
measurement.
I2C Write Command Sets MODE[2:0] = 0x03. At the same time,
set the TEMP_EN bit to initiate a single temperature measurement.
Mask the SPO2_RDY Interrupt.
2 Temperature measurement complete,
interrupt generated
TEMP_RDY interrupt triggers, alerting the central processor to
read the data.
3 Temp data is read, interrupt cleared
4 FIFO is almost full, interrupt generated Interrupt is generated when the FIFO has only one empty space left.
5 FIFO data is read, interrupt cleared
6 Next sample is stored New sample is stored at the new read pointer location. Effectively,
it is now the first sample in the FIFO.
INT
I2C BUS
LED OUTPUTS
IR
IR
IR
~
~
~
IR
IR
IR
IR
SAMPLE #1 SAMPLE #2 SAMPLE #3 SAMPLE #14 SAMPLE #15
1 2 3 4
15ms to 300ms
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Timing in Heart-Rate Mode
Power Sequencing and Requirements
Power-Up Sequencing
Figure 5 shows the recommended power-up sequence for the MAX30100.
It is recommended to power the VDD supply first, before the LED power supplies (R_LED+, IR_LED+). The interrupt and I2C pins can be pulled up to an external voltage even when the power supplies are not powered up.
After the power is established, an interrupt occurs to alert the system that the MAX30100 is ready for operation. Reading the I2C interrupt register clears the interrupt, as shown in Figure 5.
Power-Down Sequencing
The MAX30100 is designed to be tolerant of any power- supply sequencing on power-down.
I2C Interface
The MAX30100 features an I2C/SMBus-compatible, 2-wire serial interface consisting of a serial data line (SDA) and a serial clock line (SCL). SDA and SCL facilitate communication between the MAX30100 and the master at clock rates up to 400kHz. Figure 1 shows the 2-wire interface timing diagram. The master generates SCL and initiates data transfer on the bus. The master device writes data to the MAX30100 by transmitting the proper slave address followed by data. Each transmit sequence is framed by a START (S) or REPEATED START (Sr) condition and a STOP (P) condition. Each word transmitted to the MAX30100 is 8 bits long and is followed by an acknowledge clock pulse. A master reading data from the MAX30100 transmits the proper slave address followed by a series of nine SCL pulses.
The MAX30100 transmits data on SDA in sync with the master-generated SCL pulses. The master acknowledges receipt of each byte of data. Each read sequence is framed by a START (S) or REPEATED START (Sr) condition, a not acknowledge, and a STOP (P) condition. SDA operates as both an input and an open-drain output. A pullup resistor, typically greater than 500Ω, is required on SDA. SCL operates only as an input. A pullup resistor, typically greater than 500Ω, is required on SCL if there are multiple masters on the bus, or if the single master has an open-drain SCL output.
Bit Transfer
One data bit is transferred during each SCL cycle. The data on SDA must remain stable during the high period of the SCL pulse. Changes in SDA while SCL is high are control signals. See the START and STOP Conditions section.
Table 16. Events Sequence for Figure 4 in Heart-Rate Mode
Figure 5. Power-Up Sequence of the Power-Supply Rails
EVENT
DESCRIPTION
COMMENTS
1
Enter into heart rate mode
I2C Write Command Sets MODE[2:0] = 0x02. Mask the HR_RDY interrupt.
2
FIFO is almost full, interrupt generated
Interrupt is generated when the FIFO has only one empty space left.
3
FIFO data is read, interrupt cleared
4
Next sample is stored
New sample is stored at the new read pointer location. Effectively, it is now the first sample in the FIFO.
R_LED+, IR_LED+VDDINTSDA, SCLHIGH (I/O PULLUP)HIGH (I/O PULLUP)PWR_RDY INTERRUPTREAD TO CLEAR INTERRUPT
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START and STOP Conditions
SDA and SCL idle high when the bus is not in use. A master initiates communication by issuing a START condition. A START condition is a high-to-low transition on SDA with SCL high. A STOP condition is a low-to-high transition on SDA while SCL is high (Figure 6). A START condition from the master signals the beginning of a transmission to the MAX30100. The master terminates transmission, and frees the bus, by issuing a STOP condition. The bus remains active if a REPEATED START condition is generated instead of a STOP condition.
Early STOP Conditions
The MAX30100 recognizes a STOP condition at any point during data transmission except if the STOP condition occurs in the same high pulse as a START condition. For proper operation, do not send a STOP condition during the same SCL high pulse as the START condition.
Slave Address
A bus master initiates communication with a slave device by issuing a START condition followed by the 7-bit slave ID. When idle, the MAX30100 waits for a START condition followed by its slave ID. The serial interface compares each slave ID bit by bit, allowing the interface to power down and disconnect from SCL immediately if an incorrect slave ID is detected. After recognizing a START condition followed by the correct slave ID, the MAX30100 is ready to accept or send data. The LSB of the slave ID word is the Read/Write (R/W) bit. R/W indicates whether the master is writing to or reading data from the MAX30100. R/W = 0 selects a write condition, R/W = 1 selects a read condition). After receiving the proper slave ID, the MAX30100 issues an ACK by pulling SDA low for one clock cycle.
The MAX30100 slave ID consists of seven fixed bits, B7–B1 (set to 0b1010111). The most significant slave ID bit (B7) is transmitted first, followed by the remaining bits. Table 18 shows the possible slave IDs of the device.
Acknowledge
The acknowledge bit (ACK) is a clocked 9th bit that the MAX30100 uses to handshake receipt each byte of data when in write mode (Figure 7). The MAX30100 pulls down SDA during the entire master-generated 9th clock pulse if the previous byte is successfully received. Monitoring ACK allows for detection of unsuccessful data transfers. An unsuccessful data transfer occurs if a receiving device is busy or if a system fault has occurred. In the event of an unsuccessful data transfer, the bus master will retry communication. The master pulls down SDA during the 9th clock cycle to acknowledge receipt of data when the MAX30100 is in read mode. An acknowledge is sent by the master after each read byte to allow data transfer to continue. A not-acknowledge is sent when the master reads the final byte of data from the MAX30100, followed by a STOP condition.
Table 17. Slave ID Description
Figure 6. START, STOP, and REPEATED START Conditions
Figure 7. Acknowledge
B7
B6
B5
B4
B3
B2
B1
B0
WRITE ADDRESS
READ ADDRESS
1
0
1
0
1
1
1
R/W
0xAE
0xAF
SSrPSCL1SDA1SCL1SDA1START CONDITION1289CLOCK PULSE FORACKNOWLEDGMENTNOT ACKNOWLEDGEACKNOWLEDGE
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MAX30100Pulse Oximeter and Heart-Rate Sensor IC
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Write Data Format
For the write operation, send the slave ID as the first byte followed by the register address byte and then one or more data bytes. The register address pointer increments automatically after each byte of data received. For example, the entire register bank can be written by at one time. Terminate the data transfer with a STOP condition. The write operation is shown in Figure 8.
The internal register address pointer increments automatically, so writing additional data bytes fill the data registers in order.
Read Data Format
For the read operation, two I2C operations must be performed. First, the slave ID byte is sent followed by the I2C register that you wish to read. Then a REPEATED START (Sr) condition is sent, followed by the read slave ID. The MAX30100 then begins sending data beginning with the register selected in the first operation. The read pointer increments automatically, so the MAX30100 continues sending data from additional registers in sequential order until a STOP (P) condition is received. The exception to this is the FIFO_DATA register, at which the read pointer no longer increments when reading additional bytes. To read the next register after FIFO_DATA, an I2C write command is necessary to change the location of the read pointer.
An initial write operation is required to send the read register address.
Data is sent from registers in sequential order, starting from the register selected in the initial I2C write operation. If the FIFO_DATA register is read, the read pointer does not automatically increment, and subsequent bytes of data contain the contents of the FIFO.
Figure 8. Writing One Data Byte to the MAX30100
Figure 9. Reading One Byte of Data from the MAX30100
SR/W = 01010001ACKA7A6A5A4A3A2A1A0ACKSLAVE IDREGISTER ADDRESSD7D6D5D4D3D2D1D0ACKPDATA BYTES = START CONDITIONP = STOP CONDITIONACK = ACKNOWLEDGE BY THE RECEIVERINTERNAL ADDRESS POINTER AUTO-INCREMENT (FOR WRITING MULTIPLE BYTES)SR/W = 01010001ACKA7A6A5A4A3A2A1A0ACKSLAVE IDREGISTER ADDRESSS = START CONDITIONSr = REPEATED START CONDITIONP = STOP CONDITIONACK = ACKNOWLEDGE BY THE RECEIVERNACK = NOT ACKNOWLEDGESR/W = 01010001ACKD7D6D5D4D3D2D1D0NACKSLAVE IDDATA BYTEP
Figure 9
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Figure 10. Reading Multiple Bytes of Data from the MAX30100
+Denotes a lead(Pb)-free/RoHS-compliant package.
PART TEMP RANGE PIN-PACKAGE
MAX30100EFD+ -40°C to +85°C 14 OESIP
(0.8mm pitch)
660nm 880nm
ADC
AMBIENT LIGHT
CANCELLATION ANALOG
TEMP ADC
OSCILLATOR
DIGITAL
FILTER
DIGITAL
DATA
REGISTER
LED DRIVERS
I2C
COMMUNICATION
INT
SDA
SCL
IR_LED+ IR_LED+ VDD
R_DRV IR_DRV GND PGND
RED IR
RED+IR
10μF
+3.3V
50mA PEAK
(TYPICAL)
1μF
+1.8V
4.7kΩ 4.7kΩ 4.7kΩ
VDDIO
μc
OR
APPS
PROC
S 1 0 1 0 0 0 1 R/W = 0 ACK A7 A6 A5 A4 A3 A2 A1 A0 ACK
SLAVE ID REGISTER ADDRESS
S = START CONDITION
Sr = REPEATED START CONDITION
P = STOP CONDITION
ACK = ACKNOWLEDGE BY THE RECEIVER
AM = ACKNOWLEDGE BY THE MASTER
NACK = NOT ACKNOWLEDGE
Sr 1 0 1 0 0 0 1 R/W = 0 ACK D7 D6 D5 D4 D3 D2 D1 D0 AM
SLAVE ID DATA 1
D7 D6 D5 D4 D3 D2 D1 D0 AM D7 D6 D5 D4 D3 D2 D1 D0 NACK
DATA n-1 DATA n
P
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Ordering Information Chip Information
PROCESS: BiCMOS
Typical Application Circuit
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
14 OESIP F142D5+2 21-0880 90-0461
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
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Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 9/14 Initial release —
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
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MAX30100 Pulse Oximeter and Heart-Rate Sensor IC
for Wearable Health
Revision History
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

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