MAX86171
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MAX86171

Low-Noise AFE for Pulse Oximeter and Heart Rate Monitor

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

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Part Details
Part Models 2
1ku List Price Starting From $4.79
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 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 19.5-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 < 50pA RMS (Sample-to-Sample Variance in 117.1µs Integration Time)
  • Excellent Ambient Range and Rejection Capability
    • > 200μA Ambient Photodiode Current
    • > 70dB Ambient Rejection at 120Hz (Average Mode > 2)
  • Miniature 2.78mm x 1.71mm, 7 x 4, 0.35mm Ball Pitch WLP Package
  • -40°C to +85°C Operating Temperature Range
Additional Details
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The MAX86171 is an ultra-low-power optical data acquisition system with both transmit and receive channels. On the transmitter side, the MAX86171 has nine LED driver output pins, programmable from three high-current, 8-bit LED drivers. On the receiver side, MAX86171 has two low-noise charge integrating front-ends that each include independent 19.5 bit ADCs and best-in-class ambient light cancellation (ALC) circuits, 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 MAX86171 is ideal for a wide variety of optical sensing applications such as pulse oximetry and heart rate detection.

The MAX86171 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 MAX86171 is available in a compact 28-bump WLP package.

Applications

  • 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)
Part Models 2
1ku List Price Starting From $4.79

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX86171ENI+
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MAX86171ENI+T
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Product Lifecycle

PCN

Feb 22, 2022

- 2168

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PCN

Feb 22, 2022

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PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

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Tools & Simulations

Tools & Simulations 1

Reference Designs

Reference Designs 1

MAXREFDES280 - Top View

Low-Noise PPG Sensor Band for Pulse Oximeter and Heart-Rate Monitor

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MAXREFDES280

Low-Noise PPG Sensor Band for Pulse Oximeter and Heart-Rate Monitor

Low-Noise PPG Sensor Band for Pulse Oximeter and Heart-Rate Monitor

Features and Benefits

Features

  • Quick Evaluation of the MAX86171
  • Supports Configuration Optimization
  • Facilitates Understanding of MAX86171 Architecture and Solution Strategy
  • Real-Time Monitoring
  • Data Logging
  • On-Board Accelerometer
  • Bluetooth® LE
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Design & Integration Tools

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