MAX30102
High-Sensitivity Pulse Oximeter and
Heart-Rate Sensor for Wearable Health
General Description
The MAX30102 is an integrated pulse oximetry and
heart-rate monitor module. It includes internal LEDs,
photodetectors, optical elements, and low-noise electronics
with ambient light rejection. The MAX30102 provides a
complete system solution to ease the design-in process
for mobile and wearable devices.
The MAX30102 operates on a single 1.8V power supply
and a separate 5.0V power supply for the internal LEDs.
Communication is through a standard I
2
C-compatible
interface. The module can be shut down through software
with zero standby current, allowing the power rails to
remain powered at all times.
Benefits and Features
●
Heart-Rate Monitor and Pulse Oximeter Sensor in
LED Reflective Solution
●
Tiny 5.6mm x 3.3mm x 1.55mm 14-Pin Optical Module
• Integrated Cover Glass for Optimal, Robust
Performance
●
Ultra-Low Power Operation for Mobile Devices
• Programmable Sample Rate and LED Current for
Power Savings
• Low-Power Heart-Rate Monitor (< 1mW)
• Ultra-Low Shutdown Current (0.7µA, typ)
●
Fast Data Output Capability
• High Sample Rates
●
Robust Motion Artifact Resilience
• High SNR
●
-40°C to +85°C Operating Temperature Range
Applications
●
Wearable Devices
●
Fitness Assistant Devices
Ordering Information
appears at end of data sheet.
System Diagram
APPLICATIONS
HARDWARE FRAMEWORK
DRIVER
I
2
C
HOST (AP)
ELECTRICAL
OPTICAL
MAX30102
LED DRIVERS
RED/IR LED
HUMAN
SUBJECT
DIGITAL NOISE
CANCELLATION
DATA
FIFO
18-BIT
CURRENT ADC
AMBIENT LIGHT
CANCELLATION
PHOTO
DIODE
PACKAGING
ACRYLIC
(COVER
GLASS)
AMBIENT
LIGHT
19-7740; Rev 0; 9/15
MAX30102
High-Sensitivity Pulse Oximeter and
Heart-Rate Sensor for Wearable Health
Absolute Maximum Ratings
V
DD
to GND .........................................................-0.3V to +2.2V
GND to PGND ......................................................-0.3V to +0.3V
X_DRV, V
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
ESD, Human Body Model (HBM) .......................................2.5kV
Latchup Immunity ...........................................................±250mA
Continuous Power Dissipation (T
A
= +70°C)
OESIP (derate 5.5mW/°C above +70°C) ....................440mW
Operating Temperature Range .......................... -40°C to +85°C
Junction Temperature ........................................................+90°C
Soldering Temperature (reflow) ......................................+260°C
Storage Temperature Range ............................ -40°C to +105°C
Package Thermal Characteristics
(Note 1)
OESIP
Junction-to-Ambient Thermal Resistance (θ
JA
) ........180°C/W
Junction-to-Case Thermal Resistance (θ
JC
) .................150°C/W
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.
Electrical Characteristics
(V
DD
= 1.8V, V
IR_LED+
= V
R_LED+
= 5.0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C) (Note 2)
PARAMETER
POWER SUPPLY
Power-Supply Voltage
LED Supply Voltage
R_LED+ or IR_LED+ to PGND
V
DD
Guaranteed by RED and IR count
tolerance
Guaranteed by PSRR of LED driver
(R_LED+ and IR_LED+ only)
SpO
2
and HR mode, PW = 215µs,
50sps
IR only mode, PW = 215µS, 50sps
T
A
= +25°C, MODE = 0x80
1.7
1.8
2.0
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
LED+
3.1
3.3
5.25
V
Supply Current
Supply Current in Shutdown
ADC Resolution
Red ADC Count
(Note 3)
I
DD
I
SHDN
600
600
0.7
18
1200
1200
10
µA
µA
bits
PULSE OXIMETRY/HEART-RATE SENSOR CHARACTERISTICS
REDC
RED_PA = 0x0C, LED_PW = 0x01,
SPO2_SR = 0x05,
ADC_RGE = 0x00, T
A
= +25°C
IR_PA = 0x0C, LED_PW = 0x01,
SPO2_SR = 0x05
ADC_RGE = 0x00, T
A
= +25°C
55536
65536
75536
Counts
IR ADC Count
(Note 3)
IRC
55536
65536
75536
Counts
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Maxim Integrated
│
2
MAX30102
High-Sensitivity Pulse Oximeter and
Heart-Rate Sensor for Wearable Health
Electrical Characteristics (continued)
(V
DD
= 1.8V, V
IR_LED+
= V
R_LED+
= 5.0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C) (Note 2)
PARAMETER
Dark Current Count
SYMBOL
LED_DCC
CONDITIONS
RED_PA = IR_PA = 0x00,
LED_PW = 0x03, SPO2_SR = 0x01
ADC_RGE = 0x02
ADC counts with finger on
sensor under direct sunlight
(100K lux), ADC_RGE
= 0x3, LED_PW = 0x03,
SPO2_SR = 0x01
Red
LED
IR
LED
MIN
TYP
30
0.01
2
MAX
128
0.05
UNITS
Counts
% of
FS
Counts
DC Ambient Light Rejection
ALR
2
0.25
10
0.05
10
10.32
10.48
69
118
215
411
427.1
524.7
720.0
1106.6
HGB 1
870
880
30
1.4
6.5
650
660
20
2.1
9.8
670
900
10.64
1
1
Counts
% of
FS
LSB
% of
FS
LSB
MHz
ADC Count—PSRR (V
DD
)
PSRRV
DD
1.7V < V
DD
< 2.0V,
LED_PW = 0x00, SPO2_SR = 0x05
T
A
= +25°C
Frequency = DC to 100kHz, 100mV
P-P
3.6V < R_LED+, IR_LED+ < 5.0V,
T
A
= +25°C
Frequency = DC to 100kHz, 100mV
P-P
ADC Count—PSRR
(LED Driver Outputs)
ADC Clock Frequency
PSRR
LED
CLK
LED_PW = 0x00
ADC Integration Time
INT
LED_PW = 0x01
LED_PW = 0x02
LED_PW = 0x03
Slot Timing (Timing Between
Sequential Channel Samples;
e.g., Red Pulse Rising Edge To
IR Pulse Rising Edge)
LED_PW = 0x00
INT
LED_PW = 0x01
LED_PW = 0x02
LED_PW = 0x03
Per DIN ISO 719
λ
P
Δλ
V
F
P
O
λ
P
Δλ
V
F
P
O
I
LED
= 20mA, T
A
= +25°C
I
LED
= 20mA, T
A
= +25°C
I
LED
= 20mA, T
A
= +25°C
I
LED
= 20mA, T
A
= +25°C
I
LED
= 20mA, T
A
= +25°C
I
LED
= 20mA, T
A
= +25°C
I
LED
= 20mA, T
A
= +25°C
I
LED
= 20mA, T
A
= +25°C
µs
µs
COVER GLASS CHARACTERISTICS (Note 4)
Hydrolytic Resistance Class
IR LED CHARACTERISTICS (Note 4)
LED Peak Wavelength
Full Width at Half Max
Forward Voltage
Radiant Power
LED Peak Wavelength
Full Width at Half Max
Forward Voltage
Radiant Power
nm
nm
V
mW
nm
nm
V
mW
RED LED CHARACTERISTICS (Note 4)
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Maxim Integrated
│
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MAX30102
High-Sensitivity Pulse Oximeter and
Heart-Rate Sensor for Wearable Health
Electrical Characteristics (continued)
(V
DD
= 1.8V, V
IR_LED+
= V
R_LED+
= 5.0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C) (Note 2)
PARAMETER
SYMBOL
λ
(QE > 50%)
A
LxW
CONDITIONS
MIN
TYP
MAX
UNITS
PHOTODETECTOR CHARACTERISTICS (Note 4)
Spectral Range of Sensitivity
Radiant Sensitive Area
Dimensions of Radiant Sensitive
Area
Temperature ADC Acquisition
Time
Temperature Sensor Accuracy
Temperature Sensor Minimum
Range
Temperature Sensor Maximum
Range
QE: Quantum Efficiency
600
1.36
1.38 x
0.98
900
nm
mm
2
mm x
mm
INTERNAL DIE TEMPERATURE SENSOR
T
T
T
A
T
MIN
T
MAX
T
A
= +25°C
T
A
= +25°C
29
±1
-40
85
ms
°C
°C
°C
DIGITAL INPUT CHARACTERISTICS: SCL, SDA
Input High Voltage
Input Low Voltage
Input Leakage Current
Hysteresis Voltage
Ouput Low Voltage
I
2
C Write Address
I
2
C Read Address
Serial Clock Frequency
Bus Free Time Between STOP
and START Conditions
Hold Time (Repeated) START
Condition
SCL Pulse-Width Low
SCL Pulse-Width High
Setup Time for a Repeated
START Condition
Data Hold Time
f
SCL
t
BUF
t
HD;STA
t
LOW
t
HIGH
t
SU;STA
t
HD;DAT
0
1.3
0.6
1.3
0.6
0.6
0
900
V
IH
V
IL
I
IN
V
H
V
DD
= 2V
V
DD
= 2V
V
IN
= GND or V
DD (STATIC)
±0.05
0.2
I
SINK
= 6mA
AE
AF
400
0.2
0.7 x
V
DD
0.3 x
V
DD
±1
V
V
µA
V
V
Hex
Hex
kHz
µs
µs
µs
µs
µs
ns
DIGITAL OUTPUT CHARACTERISTICS: SDA,
INT
I
2
C TIMING CHARACTERISTICS (SDA, SDA,
INT)
(Note 5)
V
OL
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Maxim Integrated
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MAX30102
High-Sensitivity Pulse Oximeter and
Heart-Rate Sensor for Wearable Health
Electrical Characteristics (continued)
(V
DD
= 1.8V, V
IR_LED+
= V
R_LED+
= 5.0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C) (Note 2)
PARAMETER
Data Setup Time
Setup Time for STOP Condition
Pulse Width of Suppressed
Spike
Bus Capacitance
SDA and SCL Receiving Rise
Time
SDA and SCL Receiving Fall
Time
SDA Transmitting Fall Time
SYMBOL
t
SU;DAT
t
SU;STO
t
SP
C
B
t
R
t
RF
t
TF
20 + 0.1C
B
20 + 0.1C
B
CONDITIONS
MIN
100
0.6
0
50
400
300
300
300
TYP
MAX
UNITS
ns
µs
ns
pF
ns
ns
ns
Note 2:
All devices are 100% production tested at T
A
= +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.
Note 5:
Guaranteed by design and characterization. Not tested.
SDA
t
LOW
SCL
t
HD,STA
START CONDITION
t
R
t
SU,DAT
t
HD,DAT
t
HIGH
t
F
REPEATED START CONDITION
STOP
CONDITION
START
CONDITION
t
SU,STA
t
HD,STA
t
SP
t
BUF
t
SU,STO
Figure 1. I
2
C-Compatible Interface Timing Diagram
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