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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