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  2. Sensors and MEMS
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  5. MAX86173


Features and Benefits

  • 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

Product Details

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.


  • 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)
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX86173ENI+ Material Declaration Reliability Data 28-WLCSP-N/A
MAX86173ENI+T Material Declaration Reliability Data 28-WLCSP-N/A
Wafer Fabrication Data

Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.