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Dual-Channel Optical AFE with High Signal-to-Noise Ratio for Wearable Health

Best-in-class SNR for Addressing Low Perfusion and New Use Cases

Product Details

Key Features

Parametric specs for Bio-Sensors
Integrated LEDs none
Shutdown Mode Supply Current (µA) (typ) 1
VSUPPLY (V) (min) 1.1
VSUPPLY (V) (max) 5.5
Resolution (bits) (ADC) 19
SNR (dB) 115
Oper. Temp. (°C) -40 to +85
Package/Pins THIN WLP/28
Budgetary
Price (See Notes)
3.25
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Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Bio-Sensors
Integrated LEDs none
Shutdown Mode Supply Current (µA) (typ) 1
VSUPPLY (V) (min) 1.1
VSUPPLY (V) (max) 5.5
Resolution (bits) (ADC) 19
SNR (dB) 115
Oper. Temp. (°C) -40 to +85
Package/Pins THIN WLP/28
Budgetary
Price (See Notes)
3.25

Key Features

  • Complete Dual-Channel Optical Data-Acquisition System
  • Ultra Low-Power Operation for Wearable Devices
    • Low-Power Operation, Optical Readout Channel < 11µA at 25fps
    • Exposure Integration Period Ranging from 14.6μs to 118.2µs
    • Low Shutdown Current < 1µA
  • Excellent Top-End Dynamic Range > 97dB in White Card Loop-Back Test (Nyquist Sample-to-Sample Variance)
  • Extended Dynamic Range up to 115dB (Averaging and Off-Chip Filtering)
  • Supports Frame Rates from 1fps to 2.9kfps
  • High Resolution 20-Bit Charge Integrating ADCs
  • Supports Four PD Inputs for Multi-Parameter Measurements
  • Supports Nine LED Driver Output Pins Generated from Three 8-Bit LED Current Drivers
  • Low Dark Current Noise of < 50pARMS (Sample-to-Sample Variance in 118.2µs Integration Time)
  • Excellent Ambient Range and Rejection Capability
    • 200µA Ambient Photodiode Current
    • > 70dB Ambient Rejection at 120Hz (Burst Average > 2)
  • Miniature 2.78mm x 1.71mm, 7 x 4, 0.35mm Ball Pitch WLP Package
  • -40°C to +85°C Operating Temperature Range

Applications/Uses

  • Wearable Devices for Fitness, Wellness and Medical Applications
  • Clinical Accuracy
  • Suitable for Wrist, Finger, Ear and Other Locations
  • Optimized Performance to Detect:
  • Optical Heart Rate
  • Heart-Rate Variability
  • Oxygen Saturation (SpO2)
  • Body Hydration
  • Muscle and Tissue Oxygen Saturation (SmO2 and StO2)
  • Maximum Oxygen Consumption (VO2 max)

Description

The MAX86173 is an ultra-low-power optical data acquisition system with both transmit and receive channels. On the transmitter side, the MAX86173 has nine LED driver output pins, programmable from three high-current, 8-bit LED drivers. On the receiver side, the MAX86173 has two low-noise charge integrating front-ends that each includes independent 20-bit ADC and best-in-class ambient light cancellation (ALC) circuits, producing the highest performing integrated optical data acquisition system in the market today.

Due to its low power consumption, compact size, ease and flexibility of use, the MAX86173 is ideal for a wide variety of optical sensing applications such as pulse-oximetry and heart-rate detection.

The MAX86173 operates on a 1.8V main supply voltage and a 3.1V to 5.5V LED driver supply voltage. The device supports both I2C and SPI interfaces in a fully autonomous way. The device has a large 256-word built-in FIFO.

The MAX86173 is available in a compact WLP package 2.78mm x 1.71mm with 7 x 4, 0.35mm ball pitch.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.