General Description

The MAX86165 is an ultra-low-power, completely integrated, optical data acquisition system. On the transmitter side, the MAX86165 has a programmable low-noise LED driver with an IR emitter. On the receiver side, MAX86165 consists of a high efficiency PIN photodiode and an optical readout channel. The optical readout has a low-noise signal conditioning analog front end (AFE), including 20-bit analog‐to‐digital converter (ADC) and an industry-leading ambient light cancellation (ALC) circuit. Due to the low power consumption, compact size, ease and flexibility of use, the MAX86165 is ideal for a wide variety of optical sensing applications such as heart rate detection and proximity sensing in small spaces such as ear buds.

The MAX86165 operates on a single 2.7V to 5.5V VLEDsupply voltage. Each device has a 128-word built-in FIFO. The MAX86165 is available in a 10-pin OLGA package with compact package dimensions of 2mm x 2.5mm x 0.82mm and operates over -40ºC to +85ºC temperature range.

Benefits and Features

●Complete Single-Channel Optical Data AcquisitionSystem in a Tiny Module

●Optimized Architecture for Reflective Heart RateMonitoring

●Integrated Infrared Proximity Sensing

●Optimized Performance to Detect ContinuousMonitoring for Heart Rate Variability (HRV)

●High-Resolution 20-bit Charge Integrating ADC

●Low-Noise 8-Bit LED Current DAC

●Excellent Signal to Noise Ratio (SNR) up to 94.5dB inWhite Card Loop-Back Test

●Excellent Ambient Range and Rejection

•Up to 200μA Ambient DC Current

•80dB Ambient Rejection at 120Hz

●Ultra Low-Power Operation for Wearable Devices

●Miniature 2mm x 2.5mm x 0.82mm 10-pin OLGAPackage

Applications

●Optimized for In-Ear Applications

●AR/VR Glasses

●Miniature Package for Mobile Applications