MAX86165

RECOMMENDED FOR NEW DESIGNS

Miniature Optical Heart Rate Module

Analog Devices MAX86165 Product Info

10 February 2026 6

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

Part details & applications

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 V_LED supply 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.

APPLICATIONS

Optimized for In-Ear Applications
AR/VR Glasses
Miniature Package for Mobile Applications

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