Analog Devices MAX86170B Product Info

• Complete Single-Channel Optical Data Acquisition System
• Ultra Low-Power Operation for Wearable Devices
  • Low-Power Operation, Optical Readout Channel < 11micro;A 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
  • 200µA 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

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 2.78mm x 1.71mm with 6 x 4, 0.4mm ball pitch.

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)