Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor AFE for Wearable Health

Best-in-Class SNR for Addressing Low Perfusion & New Use Cases

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The MAX86170B is an ultra-low-power optical data acquisition system with both transmit and receive channels. On the transmitter side, the MAX86170B has four LED driver output pins, programmable from three high-current, 8-bit LED drivers. On the receiver side, MAX86170B has a low-noise charge integrating front-end that includes a 20-bit ADC and best-in-class ambient light cancellation (ALC) circuit, producing the highest performing integrated optical data acquisition system on the market today.

Due to its low power consumption, compact size, ease- and flexibility-of-use, the MAX86170B is ideal for a wide variety of optical sensing applications such as pulse oximetry and heart rate detection.

The MAX86170B 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-compatible interfaces in a fully autonomous way. The device has a large 256-word built-in FIFO. The MAX86170B is available in a compact WLP package 2.78 x 1.71mm with 6 x 4, 0.4mm ball pitch.

MAX86170B: Simplified Block Diagram MAX86170B: Simplified Block Diagram Enlarge+

Key Features

  • Complete Single-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 117.1μs
    • Low Shutdown Current < 1μA
  • Excellent Top-End Dynamic Range > 91dB in White Card Loop-Back Test (Nyquist Sample-to-Sample Variance)
  • Extended Dynamic Range up to 110dB (Averaging and Off-Chip Filtering)
  • Supports Frame Rates from 1fps to 2.9kfps
  • High Resolution 20-Bit Charge Integrating ADC
  • Supports Two PD Inputs for Multiparameter Measurements
  • Supports Four LED Driver Output Pins Generated from Three 8-Bit LED Current Drivers
  • Low Dark Current Noise of < 50pA RMS (Sample to Sample Variance in 117.1μs Integration Time)
  • Excellent Ambient Range and Rejection Capability
    • > 100μA Ambient Photodetector Current
    • > 70dB Ambient Rejection at 120Hz
  • Miniature 2.78mm x 1.71mm 6 x 4, 0.4mm Ball Pitch WLP Package
  • -40°C to +85°C Operating Temperature Range


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

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX86171EVSYS: Evaluation System for the MAX86171/MAX86170A/MAX86170B
Request Reliability Report for: MAX86170B 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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