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Ultra-Low Power
MAX32664
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 Analog Devices' optical
sensor solutions and delivering raw or calculated data to
the outside world. This is achieved while keeping overall
system power consumption in check. The device family
interfaces to a microcontroller host through a fast-mode
● 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
Measure:
• Pulse Heart Rate
2
slave I C interface for access to raw and processed sen-
sor data as well as field updates. A firmware bootloader is
also provided.
• Pulse Blood Oxygen Saturation (SpO )
2
● Finger-Based (Version D) Algorithms Measure:
• Pulse Heart Rate
The MAX32664 Version A supports the MAX30101/
MAX30102 high-sensitivity pulse oximeter and heart-rate
sensor for wearable health for finger-based applications.
• Pulse Blood Oxygen Saturation (SpO )
2
• Estimated Blood Pressure
2
A master mode I C interface for communication with sen-
sors is provided.
● Both Raw and Processed Data Are Available
● Basic Peripheral Mix Optimizes Size and Performance
The MAX32664 Version B supports the MAX86140/
MAX86141 for wrist-based applications. A master mode
SPI interface for communication with sensors is provided.
2
• One Slave I C for Communication with a Host
Microcontroller
2
• One Master I C for Communication with Sensors
The MAX32664 Version C supports the MAX86140/
MAX86141 for wrist-based applications and MAXM86161
for ear-based applications. The device provides either a
(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
• 32.768kHz RTC
with sensors.
• FIFO Provides Minimal Host Interaction
• Bootloader Facilitates Secure, Authenticated
Firmware Upgrades
The MAX32664 Version D supports the MAX30101/
MAX30102 high-sensitivity pulse oximeter and heart-rate
sensor for wearable health for finger-based applications.
2
A master mode I C interface for communication with sen-
sors is provided. Version D also supports estimated blood
pressure monitoring.
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 4; 2/22
Ordering Information appears at end of data sheet.
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