MAX32664GWEA+T [MAXIM]
Ultra-Low Power Biometric Sensor Hub;
| 型号： | MAX32664GWEA+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Ultra-Low Power Biometric Sensor Hub |
| 文件： | 总29页 (文件大小：538K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
General Description
Benefits and Features
The MAX32664 is a sensor hub family with embedded
firmware and world-class algorithms for wearables. It
seamlessly enables customer-desired sensor functionali-
ty, including communication with Maxim’s optical sensor
solutions and delivering raw or calculated data to the out-
side world. This is achieved while keeping overall system
power consumption in check. The device family interfaces
to a microcontroller host via a fast-mode slave I C inter-
face for access to raw and processed sensor data as well
as field updates. A firmware bootloader is also provided.
● Biometric Sensor Hub Enables Faster Time to Market
● Finger-Based (Version A) Algorithms Measure:
• Pulse Heart Rate
• Pulse Blood Oxygen Saturation (SpO )
2
● Wrist-Based (Version B) Algorithm Measures:
• Pulse Heart Rate
● Wrist-Based or Ear-Based (Version C) Algorithms
2
Measure:
• Pulse Heart Rate
• Pulse Blood Oxygen Saturation (SpO )
2
The MAX32664 Version A supports the MAX30101/
MAX30102 high-sensitivity pulse oximeter and heart-rate
sensor for wearable health for finger-based applications.
● Finger-Based (Version D) Algorithms Measure:
• Pulse Heart Rate
• Pulse Blood Oxygen Saturation (SpO )
2
2
A master mode I C interface for communication with sen-
• Estimated Blood Pressure
sors is provided.
● Both Raw and Processed Data Are Available
The MAX32664 Version B supports the MAX86140/
MAX86141 for wrist-based applications. A master mode
SPI interface for communication with sensors is provided.
● Basic Peripheral Mix Optimizes Size and Performance
2
• One Slave I C for Communication with a Host
Microcontroller
The MAX32664 Version C supports the MAX86140/
MAX86141 for wrist-based applications and MAXM86161
for ear-based applications. The device provides either a
2
• One Master I C for Communication with Sensors
(Versions A, C, and D)
• One Master SPI for Communication with Sensors
(Versions B and C)
2
master mode SPI or an I C interface for communication
with sensors.
• 32.768kHz RTC
The MAX32664 Version D supports the MAX30101/
MAX30102 high-sensitivity pulse oximeter and heart-rate
sensor for wearable health for finger-based applications.
• FIFO Provides Minimal Host Interaction
• Bootloader Facilitates Secure, Authenticated
Firmware Upgrades
2
A master mode I C interface for communication with sen-
sors is provided. Version D also supports estimated blood
pressure monitoring.
Ordering Information appears at end of data sheet.
The wearable algorithms in the MAX32664 sensor hub
support a directly connected accelerometer. They also al-
low feeding of X, Y, and Z samples from a host-connected
accelerometer. This architecture provides robust detection
and compensation of motion artifacts in captured samples.
The tiny form factor 1.6mm x 1.6mm WLP or 3mm x 3mm
TQFN allows for integration into extremely small applica-
tion devices.
Applications
● Wearable Fitness
● Hearables
● Wearable Medical
● Portable Medical
● Mobile Devices
19-100313; Rev 3; 4/20
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Simplified Block Diagram
MAX32664 VERSION A, VERSION C, VERSION D
2
(I C INTERFACE TO SENSORS)
POR,
BROWNOUT
MONITOR,
2
SENSOR_SCL
TO SENSORS
SENSOR_SDA
SENSOR I C
PORT
RSTN
SUPPLY VOLTAGE
MONITORS
V
CORE
SLAVE_SCL
TO HOST
BIOMETRIC ALGORITHMS
2
SLAVE I C PORT
SLAVE_SDA
REGULATOR/
V
DD
POWER CONTROL
V
SS
MFIO
HR_INT
ACCEL_INT
32KIN
INTERRUPTS
RTC
32KOUT
MAX32664 VERSION B, VERSION C
(SPI INTERFACE TO SENSORS)
POR,
BROWNOUT
MONITOR,
SUPPLY VOLTAGE
MONITORS
PPG_CS
ACCEL_CS
SENSOR SPI
PORT
RSTN
TO SENSORS
SENSOR_MOSI
SENSOR_MISO
SENSOR_SCK
V
CORE
SLAVE_SCL
SLAVE_SDA
BIOMETRIC ALGORITHMS
2
TO HOST
SLAVE I C PORT
REGULATOR/
POWER CONTROL
V
DD
V
SS
MFIO
PPG_INT
ACCEL_INT
32KIN
INTERRUPTS
RTC
32KOUT
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Maxim Integrated | 2
MAX32664
Ultra-Low Power
Biometric Sensor Hub
TABLE OF CONTENTS
General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Benefits and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
16 WLP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
24 TQFN-EP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2
Electrical Characteristics—I C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Characteristics—SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2
Pin Configuration MAX32664 Version A, Version C, Version D 16-WLP I C Interface to Sensors . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2
Pin Descriptions MAX32664 Version A, Version C, Version D 16-WLP I C Interface to Sensors . . . . . . . . . . . . . . . . . 12
Pin Configuration MAX32664 Version B, Version C 16-WLP SPI Interface to Sensors . . . . . . . . . . . . . . . . . . . . . . . . . 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pin Descriptions MAX32664 Version B, Version C 16-WLP SPI Interface to Sensors . . . . . . . . . . . . . . . . . . . . . . . . . 14
2
Pin Configuration MAX32664 Version A, Version C, Version D 24-TQFN I C Interface to Sensors . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2
Pin Descriptions MAX32664 Version A, Version C, Version D 24-TQFN I C Interface to Sensors . . . . . . . . . . . . . . . . 16
Pin Configuration MAX32664 Version B and Version C 24-TQFN SPI Interface to Sensors . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Pin Descriptions MAX32664 Version B and Version C 24-TQFN SPI Interface to Sensors . . . . . . . . . . . . . . . . . . . . . 18
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
MAX32664 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Finger Heart Rate, SpO Algorithm (Version A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2
Wrist Heart Rate Algorithm (Version B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Wrist or Ear Heart Rate, SpO Algorithm (Version C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2
Finger Heart Rate, SpO , Blood Pressure Algorithm (Version D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2
Algorithm Selection and Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Interface to Host. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Interface to the Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Device Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Evaluation Platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Typical Application Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2
MAX32664 VERSION A FINGER-BASED HEART RATE AND SpO MONITOR I C INTERFACE TO
2
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MAX32664 VERSION B WRIST-BASED HEART RATE MONITOR SPI INTERFACE TO SENSORS . . . . . . . . . . 23
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
TABLE OF CONTENTS (CONTINUED)
2
MAX32664 VERSION C EAR-BASED HEART RATE AND SpO MONITOR I C INTERFACE TO SENSORS . . . 24
2
MAX32664 VERSION C WRIST-BASED HEART RATE AND SpO MONITOR SPI INTERFACE TO SENSORS . 25
2
2
MAX32664 VERSION D FINGER-BASED HEART RATE, SpO2, BLOOD PRESSURE MONITOR I C INTERFACE
TO SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
LIST OF FIGURES
2
Figure 1. I C Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 2. SPI Master Mode Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
LIST OF TABLES
Table 1. Evaluation Platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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Maxim Integrated | 6
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Absolute Maximum Ratings
DD
32KIN, 32KOUT ........................................... -0.3V to V
All Digital Pins .............................................. -0.3V to V
V
...................................................................... -0.3V to +3.63V
Output Current (source) by Any Digital Pin........................ -25mA
Continuous Package Power Dissipation 24 TQFN-EP (multilayer
+ 0.3V
+ 0.3V
DD
DD
board) T = +70°C (derate 16.3mW/°C above +70°C)...1305mW
A
Total Current into All Digital Pins Combined (sink) ...........100mA
.................................................................................... 100mA
Output Current (sink) by Any Digital Pin.............................. 25mA
Operating Temperature Range...........................-40°C to +105°C
Storage Temperature Range ..............................-65°C to +150°C
Soldering Temperature (reflow) ........................................+260°C
V
SS
.: (All voltages with respect to V , unless otherwise noted.)
SS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the
device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
Package Information
16 WLP
Package Code
W161K1+1
Outline Number
21-100241
Land Pattern Number
Thermal Resistance, Four-Layer Board:
Refer to Application Note 1891
Junction to Ambient (θ
)
66.34 °C/W
N/A
JA
Junction to Case (θ
)
JC
24 TQFN-EP
Package Code
Outline Number
T2433+2C
21-100264
90-100089
Land Pattern Number
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θ
)
61.3 ºC/W
2.2 ºC/W
JA
Junction to Case (θ
)
JC
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.
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
(Limits are 100% tested at T = +25ºC and T = +105ºC. Limits over the operating temperature range and relevant supply voltage
A
A
range are guaranteed by design and characterization. Specifications marked GBD are guaranteed by design and not production tested.
Specifications to the minimum operating temperature are guaranteed by design and are not production tested.)
PARAMETER
POWER SUPPLIES
Supply Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
DD
1.71
1.63
1.8
3.63
1.71
V
V
Power-Fail Reset
Voltage
V
RST
Monitors V
Monitors V
DD
DD
Power-On Reset
Voltage
V
POR
1.4
V
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Maxim Integrated | 7
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Electrical Characteristics (continued)
(Limits are 100% tested at T = +25ºC and T = +105ºC. Limits over the operating temperature range and relevant supply voltage
A
A
range are guaranteed by design and characterization. Specifications marked GBD are guaranteed by design and not production tested.
Specifications to the minimum operating temperature are guaranteed by design and are not production tested.)
PARAMETER
DIGITAL I/O
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Low Voltage for
RSTN, SLAVE_SCL,
SENSOR_SDA,
SENSOR_MISO,
PPG_INT, ACCEL_INT,
MFIO
0.3 ×
V
IL
V
V
DD
Input High Voltage for
RSTN, SLAVE_SCL,
SENSOR_SDA,
SENSOR_MISO,
PPG_INT, ACCEL_INT,
MFIO, HR_INT,
0.7 ×
V
IH
V
V
DD
SLAVE_SDA
Output Low Voltage for
SENSOR_SDA,
SENSOR_SCL,
SLAVE_SDA
V
V
V
= 1.71V, I = 2mA
0.2
0.4
V
V
V
OL_I2C
DD
OL
Output High Voltage for
SENSOR_SDA,
SENSOR_SCL,
SLAVE_SDA
V
0.4
-
DD
V
= 1.71V, I
= 2mA
OH
OH_I2C
DD
Output High Voltage for
PPG_CS, ACCEL_CS,
SENSOR_MOSI,
V
DD
0.4
-
V
OH
I
= 1mA
OH
SENSOR_SCK, MFIO
Input Hysteresis
(Schmitt)
V
300
4
mV
pF
nA
nA
kΩ
IHYS
Input/Output Pin
Capacitance for All Pins
C
IO
IL
Input Leakage Current
Low
I
V
V
= 0V
-500
-500
+500
+500
IN
Input Leakage Current
High
I
= 3.6V
IH
IN
Input Pullup Resistor to
RSTN
R
Pullup to V
= 3.63V
DD
10.5
PU_VDD
CLOCKS
System Clock
Frequency
f
96
MHz
kHz
SYS_CLK
32.768kHz watch crystal, C = 6pF, ESR
L
RTC Input Frequency
f
32.768
32KIN
< 90kΩ, C < 2pF
0
RTC Operating Current
RTC Power-Up Time
I
All power modes, RTC enabled
0.45
250
μA
ms
RTC
t
RTC_ ON
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
2
Electrical Characteristics—I C
(Limits are 100% tested at T = +25°C and T = +105°C. Limits over the operating temperature range and relevant supply voltage
A
A
range are guaranteed by design and characterization. Specifications marked GBD are guaranteed by design and not production tested.
Specifications to the minimum operating temperature are guaranteed by design and are not production tested.)
PARAMETER
FAST MODE
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output Fall Time
t
From V
to V
OL_I2C(MAX)
150
75
ns
ns
OF
OL_I2C(MIN)
Pulse Width Suppressed
by Input Filter
t
SP
SCL Clock Frequency
Low Period SCL Clock
High Time SCL Clock
f
0
400
kHz
μs
SCL
t
1.3
0.6
LOW
t
μs
HIGH
Setup Time for
Repeated Start
Condition
t
0.6
0.6
μs
SU;STA
HD;STA
Hold Time for Repeated
Start Condition
t
t
μs
Data Setup Time
Data Hold Time
125
10
ns
ns
SU;DAT
HD;DAT
t
Rise Time for SDA and
SCL
t
30
30
ns
ns
μs
R
Fall Time for SDA and
SCL
t
F
Setup Time for a Stop
Condition
t
t
0.6
1.3
SU;STO
Bus Free Time Between
a Stop and Start
Condition
t
μs
BUS
Data Valid Time
0.9
0.9
μs
μs
VD;DAT
VD;ACK
Data Valid Acknowledge
Time
t
Electrical Characteristics—SPI
(TIming specifications are guaranteed by design and not production tested.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MASTER MODE
SPI Master Operating
Frequency
f
t
48
MHz
ns
MCK
SPI Master SCK Period
1/f
MCK
MCK
SCK Output Pulse-
Width High/Low
t
, t
t
t
t
/2
ns
MCH MCL
MCK
MCK
MCK
MOSI Output Hold Time
After SCK Sample Edge
t
/2
/2
ns
ns
MOH
MOSI Output Valid to
Sample Edge
t
MOV
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
Electrical Characteristics—SPI (continued)
(TIming specifications are guaranteed by design and not production tested.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MISO Input Valid to
SCK Sample Edge
Setup
t
5
ns
MIS
MISO Input to SCK
Sample Edge Hold
t
t
/2
ns
MIH
MCK
STOP
START
START
REPEAT
START
t
BUS
SDA
SCL
t
OF
t
R
t
SU;STO
t
SP
t
t
HIGH
SU;STA
t
SU;DAT
t
HD;STA
t
t
HD;DAT
t
LOW
t
VD;ACK
VD;DAT
2
Figure 1. I C Timing Diagram
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
SHIFT SAMPLE SHIFT SAMPLE
SSx
(SHOWN ACTIVE LOW)
t
MCK
SCK
CKPOL/CKPHA
0/1 OR 1/0
t
MCH
t
MCL
SCK
CKPOL/CKPHA
0/0 OR 1/1
t
MOH
t
MOV
t
MLH
MOSI/SDIOx
(OUTPUT)
MSB
MSB-1
LSB
t
MIS
t
MIH
MISO/SDIOx
(INPUT)
MSB
MSB-1
LSB
Figure 2. SPI Master Mode Timing Diagram
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MAX32664
Ultra-Low Power
Biometric Sensor Hub
2
Pin Configuration MAX32664 Version A, Version C, Version D 16-WLP I C Interface to
Sensors
.
TOP VIEW
MAX32664 Version A, Version C, Version D
(I2C Interface to Sensors)
1
2
3
4
+
A
B
C
D
32KOUT
RSTN
32KIN
V
V
CORE
DD
SENSOR_SDA SENSOR_SCL
V
SS
D.N.C.
MFIO
ACCEL_INT
D.N.C.
HR_INT
D.N.C.
SLAVE_SCL
SLAVE_SDA
16-WLP
2
Pin Descriptions MAX32664 Version A, Version C, Version D 16-WLP I C Interface to
Sensors
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
POWER
This pin must be bypassed to V with a 1.0μF capacitor as close
SS
A3
A4
V
Digital Supply Voltage as possible to the package. The device operates solely from this
one power supply pin.
DD
V
CORE
must always be bypassed to V with a 1.0μF capacitor as
SS
V
CORE
Core Supply Voltage
Digital Ground
close as possible to the package. Do not connect this device pin to
any other circuits.
B2
V
SS
CLOCK
Connect a 32.768kHz crystal between 32KIN and 32KOUT for RTC
operation. Optionally, an external clock source can be driven on
32KIN if the 32KOUT pin is left unconnected.
32.768kHz Crystal
Oscillator Input
A2
A1
32KIN
32.768kHz Crystal
Oscillator Output
32KOUT
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Maxim Integrated | 12
MAX32664
Ultra-Low Power
Biometric Sensor Hub
.
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
RESET
Hardware Power Reset (Active-Low) Input. The device remains in
reset while this pin is in its active state. When the pin transitions to
its inactive state, the device performs a reset (resetting all logic on
all supplies except for real-time clock circuitry) and begins
B1
RSTN
Reset
execution. This pin is internally connected with an internal pullup to
the V
supply as indicated in the Electrical Characteristics table.
DD
Add and place a noise snubber circuit as close as possible to the
device, with component values shown in the Typical Application
Circuits.
2
I C
2
2
This is the I C slave SCL that should be connected to the host I C
master SCL.
2
D1
D2
B4
SLAVE_SCL
SLAVE_SDA
SENSOR_SCL
SENSOR_SDA
I C Slave Clock
2
2
This is the I C slave SDA that should be connected to the host I C
master SDA.
2
I C Slave Data
2
2
This is the I C master SCL that should be connected to the I C
slave SCL on the slave sensors.
2
I C Sensor Clock
2
2
This is the I C master SDA that should be connected to the I C
slave SDA on the slave sensors.
2
B3
INTERRUPTS
C4
I C Sensor Data
Heart Rate/PPG
This pin connects to the heart rate/PPG monitor sensor interrupt
HR_INT
Monitor Interrupt Input output.
Accelerometer Interrupt
C3
ACCEL_INT
This pin connects to the accelerometer sensor interrupt output.
Input
Versions A/D: This pin provides different functions. MFIO asserts
low as an output when the sensor hub needs to communication with
the host; MFIO acts as an input and when held low during a reset,
the sensor hub enters bootloader mode. Version C: The host
asserts MFIO low when it needs to communicate with the sensor
hub; MFIO acts as an input and when held low during a reset, the
sensor hub enters bootloader mode.
C2
MFIO
Multifunction IO
DO NOT CONNECT
This pin is internally connected. Do not make any electrical
C1, D3, D4
D.N.C.
Do Not Connect
connection, including V , to this pin.
ss
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Maxim Integrated | 13
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Pin Configuration MAX32664 Version B, Version C 16-WLP SPI Interface to Sensors
.
TOP VIEW
MAX32664 Version B, Version C
(SPI Interface to Sensors)
1
2
3
4
+
A
B
C
D
32KOUT
RSTN
32KIN
V
V
CORE
DD
ACCEL_INT
PPG_INT
PPG_CS
V
SS
ACCEL_CS
SLAVE_SCL
MFIO
SENSOR_SCK
SLAVE_SDA SENSOR_MISO SENSOR_MOSI
16-WLP
Pin Descriptions MAX32664 Version B, Version C 16-WLP SPI Interface to Sensors
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
POWER
This pin must be bypassed to V with a 1.0μF capacitor as close
SS
A3
A4
V
Digital Supply Voltage as possible to the package. The device operates solely from this
one power supply pin.
DD
V
CORE
must always be bypassed to V with a 1.0μF capacitor as
SS
V
CORE
Core Supply Voltage
Digital Ground
close as possible to the package. Do not connect this device pin to
any other circuits.
B2
V
SS
CLOCK
Connect a 32.768kHz crystal between 32KIN and 32KOUT for RTC
operation. Optionally, an external clock source can be driven on
32KIN if the 32KOUT pin is left unconnected.
32.768kHz Crystal
Oscillator Input
A2
32KIN
32.768kHz Crystal
Oscillator Output
A1
32KOUT
RESET
Hardware Power Reset (Active-Low) Input. The device remains in
reset while this pin is in its active state. When the pin transitions to
its inactive state, the device performs a reset (resetting all logic on
all supplies except for real-time clock circuitry) and begins
B1
RSTN
Reset
execution. This pin is internally connected with an internal pullup to
the V
supply as indicated in the Electrical Characteristics table.
DD
Add and place a noise snubber circuit as close as possible to the
device, with component values shown in the Typical Application
Circuits.
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Maxim Integrated | 14
MAX32664
Ultra-Low Power
Biometric Sensor Hub
.
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
SPI
SPI Master Clock for
Sensors
This is the SPI master clock that should be connected to the sensor
SPI SCK.
C3
SENSOR_SCK
SENSOR_MISO
SENSOR_MOSI
PPG_CS
SPI Master In Slave
Out
This is the SPI master in slave out that should be connected to the
sensor SPI data output pin.
D3
D4
C4
C1
SPI Master Out Slave This is the SPI master out slave in that should be connected to the
In
sensor SPI data input pin.
PPG Sensor Chip
Select
This is the SPI master PPG sensor chip select output that should be
connected to the SPI slave PPG sensor chip select input.
Accelerometer Chip
Select
This is the SPI master accelerometer chip select output that should
be connected to the SPI slave accelerometer chip select input.
ACCEL_CS
2
I C
2
2
This is the I C slave SCL that should be connected to the host I C
master SCL.
2
D1
SLAVE_SCL
SLAVE_SDA
I C Slave Clock
2
2
This is the I C slave SDA that should be connected to the host I C
master SDA.
2
D2
INTERRUPTS
B4
I C Slave Data
PPG Sensor Interrupt
Input
PPG_INT
This pin connects to the PPG sensor interrupt output.
Accelerometer Interrupt
Input
B3
C2
ACCEL_INT
This pin connects to the accelerometer sensor interrupt output.
The MFIO pin provides different functions. MFIO acts as an input
and when held low during a reset, the sensor hub enters bootloader
mode. The host asserts MFIO low when it needs to communicate
with the sensor hub.
MFIO
Multifunction IO
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Maxim Integrated | 15
MAX32664
Ultra-Low Power
Biometric Sensor Hub
2
Pin Configuration MAX32664 Version A, Version C, Version D 24-TQFN I C Interface
to Sensors
.
TOP VIEW
24 23 22 21 20
1
19
18 HR_INT
MFIO
D.N.C.
NC
ACCEL_INT
+
2
3
4
5
6
17 D.N.C
16 D.N.C
15 NC
MAX32664
VERSION A
VERSION C
VERSION D
D.N.C
D.N.C
RSTN
14
13
SENSOR_SCL
SENSOR_SDA
EP*
7
V
SS
8
9
10 11 12
24 TQFN-EP
3mm x 3mm
I2C Interface to Sensors
*EP = EXPOSED PAD
2
Pin Descriptions MAX32664 Version A, Version C, Version D 24-TQFN I C Interface
to Sensors
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
POWER
This pin must be bypassed to V with a 1.0μF capacitor as close
SS
11, 22
V
DD
Digital Supply Voltage as possible to the package. The device operates solely from this
one power supply pin.
V
CORE
must always be bypassed to V with a 1.0μF capacitor as
SS
12
7, 10
EP
V
Core Supply Voltage
Digital Ground
close as possible to the package. Do not connect this device pin to
any other circuits.
CORE
V
SS
Exposed Pad (TQFN Only). This pad must be connected to V
.
SS
EP
Exposed Pad
Refer to Application Note 3273: Exposed Pads: A Brief Introduction
for additional information.
CLOCK
9
Connect a 32.768kHz crystal between 32KIN and 32KOUT for RTC
operation. Optionally, an external clock source can be driven on
32KIN if the 32KOUT pin is left unconnected.
32.768kHz Crystal
Oscillator Input
32KIN
32.768kHz Crystal
Oscillator Output
8
32KOUT
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Maxim Integrated | 16
MAX32664
Ultra-Low Power
Biometric Sensor Hub
.
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
RESET
Hardware Power Reset (Active-Low) Input. The device remains in
reset while this pin is in its active state. When the pin transitions to
its inactive state, the device performs a reset (resetting all logic on
all supplies except for real-time clock circuitry) and begins
6
RSTN
Reset
execution. This pin is internally connected with an internal pullup to
the V
supply as indicated in the Electrical Characteristics table.
DD
Add and place a noise snubber circuit as close as possible to the
device, with component values shown in the Typical Application
Circuits.
2
I C
2
2
This is the I C slave SCL that should be connected to the host I C
master SCL.
2
24
23
14
SLAVE_SCL
SLAVE_SDA
SENSOR_SCL
SENSOR_SDA
I C Slave Clock
2
2
This is the I C slave SDA that should be connected to the host I C
master SDA.
2
I C Slave Data
2
2
This is the I C master SCL that should be connected to the I C
slave SCL on the slave sensors.
2
I C Sensor Clock
2
2
This is the I C master SDA that should be connected to the I C
slave SDA on the slave sensors.
2
13
INTERRUPTS
18
I C Sensor Data
Heart Rate/PPG
This pin connects to the heart rate/PPG monitor sensor interrupt
HR_INT
Monitor Interrupt Input output.
Acceleraometer
Interrupt Input
19
ACCEL_INT
This pin connects to the accelerometer sensor interrupt output.
Versions A/D: This pin provides different functions. MFIO asserts
low as an output when the sensor hub needs to communication with
the host; MFIO acts as an input and when held low during a reset,
the sensor hub enters bootloader mode. Version C: The host
asserts MFIO low when it needs to communicate with the sensor
hub; MFIO acts as an input and when held low during a reset, the
sensor hub enters bootloader mode.
1
MFIO
Multifunction IO
DO NOT CONNECT
2, 4, 5, 16,
17, 20, 21
This pin is internally connected. Do not make any electrical
D.N.C.
NC
Do Not Connect
connection, including V , to this pin.
ss
NOT CONNECTED
Not Connected. This
pin is not connected to
the die and can be
used to route any
signal.
This pin is not connected to the die and can be used to route any
signal.
3, 15
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Maxim Integrated | 17
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Pin Configuration MAX32664 Version B and Version C 24-TQFN SPI Interface to
Sensors
.
TOP VIEW
24 23 22 21 20
1
19
18 PPG_CS
MFIO
ACCEL_CS
NC
SENSOR_SCK
+
2
3
4
5
6
17 D.N.C
16 D.N.C
15 NC
MAX32664
VERSION B
VERSION C
D.N.C
D.N.C
RSTN
14 PPG_INT
EP*
7
13
ACCEL_INT
V
SS
8
9
10 11 12
24 TQFN-EP
3mm x 3mm
SPI Interface to Sensors
*EP = EXPOSED PAD
Pin Descriptions MAX32664 Version B and Version C 24-TQFN SPI Interface to
Sensors
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
POWER
This pin must be bypassed to V with a 1.0μF capacitor as close
SS
11, 22
V
DD
Digital Supply Voltage as possible to the package. The device operates solely from this
one power supply pin.
V
CORE
must always be bypassed to V with a 1.0μF capacitor as
SS
12
7, 10
EP
V
Core Supply Voltage
Digital Ground
close as possible to the package. Do not connect this device pin to
any other circuits.
CORE
V
SS
Exposed Pad (TQFN Only). This pad must be connected to V
.
SS
EP
Exposed Pad
Refer to Application Note 3273: Exposed Pads: A Brief Introduction
for additional information.
CLOCK
9
Connect a 32.768kHz crystal between 32KIN and 32KOUT for RTC
operation. Optionally, an external clock source can be driven on
32KIN if the 32KOUT pin is left unconnected.
32.768kHz Crystal
Oscillator Input
32KIN
32.768kHz Crystal
Oscillator Output
8
32KOUT
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Maxim Integrated | 18
MAX32664
Ultra-Low Power
Biometric Sensor Hub
.
FUNCTION MODE
PIN
NAME
FUNCTION
Signal Name
RESET
Hardware Power Reset (Active-Low) Input. The device remains in
reset while this pin is in its active state. When the pin transitions to
its inactive state, the device performs a reset (resetting all logic on
all supplies except for real-time clock circuitry) and begins
6
RSTN
Reset
execution. This pin is internally connected with an internal pullup to
the V
supply as indicated in the Electrical Characteristics table.
DD
Add and place a noise snubber circuit as close as possible to the
device, with component values shown in the Typical Application
Circuits.
SPI
SPI Master Clock for
Sensors
This is the SPI master clock that should be connected to the sensor
SPI SCK.
19
SENSOR_SCK
SENSOR_MISO
SENSOR_MOSI
PPG_CS
SPI Master In Slave
Out
This is the SPI master in slave out that should be connected to the
sensor SPI data output pin.
21
20
18
2
SPI Master Out Slave This is the SPI master out slave in that should be connected to the
In
sensor SPI data input pin.
PPG Sensor Chip
Select
This is the SPI master PPG sensor chip select output that should be
connected to the SPI slave PPG sensor chip select input.
Accelerometer Chip
Select
This is the SPI master accelerometer chip select output that should
be connected to the SPI slave accelerometer chip select input.
ACCEL_CS
2
I C
2
2
This is the I C slave SCL that should be connected to the host I C
master SCL.
2
24
SLAVE_SCL
SLAVE_SDA
I C Slave Clock
2
2
This is the I C slave SDA that should be connected to the host I C
master SDA.
2
23
INTERRUPTS
14
I C Slave Data
PPG Sensor Interrupt
Input
PPG_INT
This pin connects to the PPG sensor interrupt output.
Accelerometer Interrupt
Input
13
1
ACCEL_INT
This pin connects to the accelerometer sensor interrupt output.
This pin provides different functions. MFIO acts as an input and
when held low during a reset, the sensor hub enters bootloader
mode. The host asserts MFIO low when it needs to communicate
with the sensor hub.
MFIO
Multifunction IO
Do Not Connect
DO NOT CONNECT
4, 5, 16, 17
This pin is internally connected. Do not make any electrical
D.N.C.
NC
connection, including V , to this pin.
ss
NOT CONNECTED
Not Connected. This
pin is not connected to
the die and can be
used to route any
signal.
This pin is not connected to the die and can be used to route any
signal.
3, 15
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Maxim Integrated | 19
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Detailed Description
MAX32664
The MAX32664 is a sensor hub family with embedded firmware and algorithms for wearables. It seamlessly enables
customer-desired sensor functionality, including communication with Maxim’s optical sensor solutions and delivering
raw or calculated data to the outside world. This is achieved while keeping overall system power consumption in
2
check. The device family interfaces to a microcontroller host via a fast-mode slave I C interface for access to raw and
processed sensor data as well as field updates. The sampling is adjusted automatically by the algorithm to minimize
power consumption and can be configured by the user as needed.
Finger Heart Rate, SpO Algorithm (Version A)
The MAX32664 Version A communicates with the MAX30101/MAX30102 via I C to perform finger-based heart rate
2
2
and blood oxygen saturation (SpO ) monitoring. The embedded algorithm uses digital filtering, pressure/position
2
compensation, advanced R-wave detection, and automatic gain control to determine the heart rate in beats per minute
while minimizing power. Also, the Maxim Integrated sensor hardware has built-in ambient light rejection to minimize
background noise. SpO2 results are reported as percentage of hemoglobin that is saturated with oxygen. The calibration
values for SpO configuration should be determined prior to deploying the end product. Use of an accelerometer is
2
recommended to detect and compensate for the artifacts of motion on the algorithm.
Wrist Heart Rate Algorithm (Version B)
The MAX32664 Version B communicates with the MAX86140/MAX86141 via SPI to perform wrist-based heart rate
measurements. The embedded algorithm uses digital filtering, distance/motion compensation, and advanced R-wave
detection to determine the pulse rate in beats per minute. Power usage is minimized with automatic gain control. In
addition, the Maxim Integrated sensor hardware provides additional features such as ambient light rejection, high signal-
to-noise (SNR) ratio, and external LEDs for optimal placement. Use of an accelerometer is required to detect and
compensate for the artifacts of motion on the algorithm.
Wrist or Ear Heart Rate, SpO Algorithm (Version C)
The MAX32664 Version C communicates with the MAX86141 through SPI or to the MAXM86161 through I C to perform
2
2
wrist-based or ear-based heart rate and blood oxygen saturation (SpO ) measurements. The embedded algorithm uses
2
digital filtering, distance/motion compensation, and advanced R-wave detection to determine the pulse rate in beats per
minute. Power usage is minimized with automatic gain control. SpO results are reported as a percentage of hemoglobin
2
that is saturated with oxygen. The calibration values for SpO configuration should be determined before deploying
2
the end product. In addition, the Maxim Integrated sensor hardware provides additional features such as ambient light
rejection, high signal-to-noise (SNR) ratio, and external LEDs for optimal placement. Use of an accelerometer is required
to detect and compensate for the artifacts of motion on the algorithm.
Finger Heart Rate, SpO , Blood Pressure Algorithm (Version D)
The MAX32664 Version D communicates with the MAX30101/MAX30102 through I C to perform finger-based heart
2
2
rate, blood oxygen saturation (SpO ), and blood pressure monitoring. The embedded algorithm uses digital filtering,
2
pressure/position compensation, advanced R-wave detection, and automatic gain control to determine the heart rate
in beats per minute while minimizing power. Also, the Maxim Integrated sensor hardware has built-in ambient light
rejection to minimize background noise. SpO results are reported as percentage of hemoglobin that is saturated with
2
oxygen.The calibration values for SpO configuration should be determined before deploying the end product. Estimated
2
blood pressure is reported for systolic and diastolic blood pressure. Blood pressure cuff measurements are used to set
the blood pressure calibration data in the firmware. An accelerator is not required by the algorithm.
Algorithm Selection and Evaluation
During early stages of algorithm selection and evaluation, a user may wish to experiment with different versions of
the MAX32664. To facilitate this, the MAX32664 Version Z was created. The MAX32664 Version Z contains only the
bootloader and a Z encryption key. The Version Z encryption key is used as a generic key that allows multiple, Maxim
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Maxim Integrated | 20
MAX32664
Ultra-Low Power
Biometric Sensor Hub
supplied, algorithms to be accepted by the bootloader (not at the same time). For example, various Maxim evaluation
kits use the MAX32664 Version Z. This allows any of the versions of algorithm to be evaluated. In order to do this,
a special version of the algorithms must be obtained from Maxim (Version A, B, C, or D algorithm with Z encryption
key). Furthermore, it must be noted that the sensor interface/device pinout may be different between various algorithm
2
versions, such as I C vs. SPI. The MAX32664 Version Z is not intended for mass production.
Each production version (A,B,C,D) has its own bootloader with encryption and an initial preprogrammed version of
the firmware. If the user determines that performance of the initial preprogrammed firmware is not sufficient for
their application, they can upgrade the firmware by going to the MAX32664 Maxim webpage
(https://www.maximintegrated.com/en/products/sensors/MAX32664.html) to obtain the latest version of the firmware.
Interface to Host
2
The interface to the host is the I C interface The devices support one slave interface with an address of 0x55. The
following features for this interface are as follows:
● One slave for communication with a host
● RESTART condition
● Fast mode: 400kbps
● Internal filter to reject noise spikes
● Receiver FIFO depth of 8 bytes
● Transmitter FIFO depth of 8 bytes
● Firmware bootloader
Interface to the Sensors
The interface to the sensors is either a master SPI or a fast-mode I C. Pullup resistors are required for the I C.
2
2
Device Selection
Refer to the Ordering Information at the end of this data sheet for interface type device selection.
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Maxim Integrated | 21
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Applications Information
Evaluation Platforms
The actual device (IC) used in the evaluation platforms may be the MAX32664 Version Z pre-programmed with the
corresponding algorithm. Refer to the Algorithm Selection and Evaluation for additional information.
Table 1. Evaluation Platforms
DEVICE
PLATFORM
MAX32664 Version A and Version D
MAX32664 Version B
MAXREFDES220#
MAXREFDES101#
MAXREFDES103#
MAX32664 Version C
Typical Application Circuits
2
MAX32664 VERSION A FINGER-BASED HEART RATE AND SpO MONITOR I C INTERFACE TO
2
SENSORS
1.8V
1.8V
1 µF
5.0V
4.7 µF
1.8V
V
V
+
+
V
LED
DD
V
DD
HR_INT
INT
1.8V
LED
MAX30101
HEART
RATE,
4.7 µF
4.7kΩ
4.7kΩ
SLAVE_SCL
SLAVE_SDA
HUMAN
FINGER
4.7kΩ
4.7kΩ
SpO2
SENSOR
TO HOST
MICRO
SENSOR_SCL
SENSOR_SDA
SCL
SDA
MFIO
RSTN
PGND GND
MAX32664
VERSION A
BIOMETRIC
SENSOR HUB
100 nF
10 Ω
NOISE
SNUBBER
1.8V
V
DD
SDA
SCL
ACCELEROMETER
V
V
CORE
ACCEL_INT
INT
1 µF
GND
32KIN 32KOUT
SS
32.768kHz, 6pF
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Maxim Integrated | 22
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Typical Application Circuits (continued)
MAX32664 VERSION B WRIST-BASED HEART RATE MONITOR SPI INTERFACE TO SENSORS
1.8V
1.8V
5.0V
1.8V
1 µF
1 µF
10 µF
0.1 µF
1.8V
4.7kΩ
VLED
VDD_ANA VDD_DIG
VREF
INT
V
DD
10 µF
PPG_INT
PPG_CS
LED1_DRV
LED2_DRV
LED3_DRV
4.7kΩ
4.7kΩ
N.C.
N.C.
MAX86141
HEART
SLAVE_SCL
SLAVE_SDA
CSB
SCLK
SDI
RATE
SENSOR
PD1_IN
SENSOR_SCK
SENSOR_MOSI
SENSOR_MISO
ACCEL_CS
TO HOST
MICRO
PD_GND
MFIO
RSTN
SDO
PD2_IN
PGND GND_ANA GND_DIG
1.8V
100 nF
10 Ω
NOISE
SNUBBER
MAX32664
VERSION B
BIOMETRIC
SENSOR HUB
V
DD
SDO
SDI
SCLK
CS
ACCELEROMETER
V
V
CORE
1 µF
INT
ACCEL_INT
GND
32KIN 32KOUT
32.768kHz, 6pF
SS
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Maxim Integrated | 23
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Typical Application Circuits (continued)
2
MAX32664 VERSION C EAR-BASED HEART RATE AND SpO MONITOR I C INTERFACE TO
2
SENSORS
1.8V
1.8V
1.8V
1 µF
5.0V
1.0 µF
1.0 µF
1.8V
4.7kΩ
VREF
VLDO LDO_EN
V
DD
HR_INT
GPIO
INTB
V
LED
GPIO
10 µF
1.8V
4.7kΩ
4.7kΩ
MAXM86161
HEART
N.C.
N.C.
N.C.
SCL
SDA
SLAVE_SCL
SLAVE_SDA
HUMAN
EAR
RATE, SpO2
SENSOR
4.7kΩ
TO HOST
MICRO
SENSOR_SCL
SENSOR_SDA
MFIO
RSTN
GND_DIG PGND GND_ANA
100 nF
10 Ω
NOISE
SNUBBER
MAX32664
VERSION C
BIOMETRIC
SENSOR HUB
1.8V
V
DD
SDA
SCL
ACCELEROMETER
V
V
CORE
ACCEL_INT
INT
1 µF
GND
32KIN 32KOUT
SS
32.768kHz, 6pF
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Maxim Integrated | 24
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Typical Application Circuits (continued)
MAX32664 VERSION C WRIST-BASED HEART RATE AND SpO MONITOR SPI INTERFACE TO
2
SENSORS
1.8V
1.8V
5.0V
1.8V
1 µF
1 µF
10 µF
0.1 µF
1.8V
4.7kΩ
VLED
VDD_ANA VDD_DIG
VREF
INT
V
DD
10 µF
PPG_INT
PPG_CS
LED1_DRV
LED2_DRV
LED3_DRV
4.7kΩ
4.7kΩ
MAX86141
HEART
SLAVE_SCL
SLAVE_SDA
CSB
SCLK
SDI
RATE, SpO2
SENSOR
PD1_IN
SENSOR_SCK
SENSOR_MOSI
SENSOR_MISO
ACCEL_CS
TO HOST
MICRO
PD_GND
MFIO
RSTN
SDO
PD2_IN
PGND GND_ANA GND_DIG
1.8V
100 nF
10 Ω
NOISE
SNUBBER
MAX32664
VERSION C
BIOMETRIC
SENSOR HUB
V
DD
SDO
SDI
SCLK
CS
ACCELEROMETER
V
V
CORE
1 µF
INT
ACCEL_INT
GND
32KIN 32KOUT
32.768kHz, 6pF
SS
www.maximintegrated.com
Maxim Integrated | 25
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Typical Application Circuits (continued)
2
MAX32664 VERSION D FINGER-BASED HEART RATE, SpO2, BLOOD PRESSURE MONITOR I C
INTERFACE TO SENSORS
1.8V
1.8V
1 µF
5.0V
4.7 µF
1.8V
V
V
+
+
V
LED
DD
V
DD
INT
HR_INT
1.8V
LED
4.7 µF
MAX30101
4.7kΩ
4.7kΩ
HEART RATE,
SpO2, BLOOD
PRESSURE
SENSOR
SLAVE_SCL
SLAVE_SDA
HUMAN
FINGER
4.7kΩ
4.7kΩ
TO HOST
MICRO
SENSOR_SCL
SENSOR_SDA
SCL
SDA
MFIO
RSTN
PGND GND
MAX32664
VERSION D
BIOMETRIC
SENSOR HUB
100 nF
10 Ω
NOISE
SNUBBER
V
V
CORE
ACCEL_INT N.C.
1 µF
32KIN 32KOUT
SS
32.768kHz, 6pF
www.maximintegrated.com
Maxim Integrated | 26
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Ordering Information
SENSOR
INTERFACE
COMPATIBLE
SENSORS
PART
VERSION
PIN-PACKAGE
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
2
MAX32664GWEA+
MAX32664GWEA+T
MAX32664GWEB+
MAX32664GWEB+T
MAX32664GWEC+
MAX32664GWEC+T
MAX32664GWED+
MAX32664GWED+T
MAX32664GTGA+
MAX32664GTGA+T
MAX32664GTGB+
MAX32664GTGB+T
MAX32664GTGC+
A
I C
MAX30101
MAX30101
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
2
A
B
B
C
C
D
D
A
A
B
B
C
I C
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
MAX86140/
141
SPI
SPI
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
MAX86140/
141
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
MAX86140/
141,
MAXM86161
2
SPI/I C
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
MAX86140/
141,
MAXM86161
2
SPI/I C
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
MAX30101/
102
2
I C
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
MAX30101/
102
2
I C
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
MAX30101/
102
2
I C
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
MAX30101/
102
2
I C
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
MAX86140/
141
SPI
SPI
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
MAX86140/
141
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
MAX86140/
141,
MAXM86161
2
SPI/I C
www.maximintegrated.com
Maxim Integrated | 27
MAX32664
Ultra-Low Power
Biometric Sensor Hub
24 TQFN-EP
MAX86140/
141,
MAXM86161
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
2
MAX32664GTGC+T
C
D
D
Z
SPI/I C
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
MAX30101/
102
2
MAX32664GTGD+
MAX32664GTGD+T
MAX32664GWEZ+
MAX32664GTGZ+
I C
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
MAX30101/
102
2
I C
16 WLP
(1.6mm x 1.6mm x
0.65mm, 0.35mm
pitch)
—
—
—
—
24 TQFN-EP
(3mm x 3mm x
0.75mm, 0.5mm
pitch)
Z
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel. Full reel.
www.maximintegrated.com
Maxim Integrated | 28
MAX32664
Ultra-Low Power
Biometric Sensor Hub
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
1
4/18
Initial release
—
2/19
Revised entire data sheet
1–13
Updated General Description, Benefits and Features, Simplified Block Diagram, Pin
Configurations, Pin Descriptions, Wrist Heart Rate SpO2 Algorithm (Version C),
Finger
Heart Rate SpO2 Blood Pressure Algorithm (Version D), Algorithm Selection and
Evaluation, Typical Application Circuits, and Ordering Information sections
1, 2, 7–10,
14–16
2
3
5/19
Updated General Description, Benefits and Features, Absolute Maximum Ratings,
2
Electrical Characteristics, Electrical Characteristics—I C, Pin Description, Finger
1, 7–9, 12–21,
27, 28
4/20
Heart Rate, SpO (Version A), Wrist Heart Rate (Version B), Wrist or Ear Heart
2
Rate, SpO Algorithm (Version C), Finger Heart Rate, SpO , Blood Pressure
2
2
Algorithm (Version D), Interface to Host, and Ordering Information
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
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.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2020 Maxim Integrated Products, Inc.
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