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Product Introduction:

The MAX86165EFB is an ultra-low power, fully integrated optical data acquisition system. On the transmitter side, the MAX86165 has a programmable low noise LED driver with an IR transmitter. On the receiver side, the MAX86165 consists of a high-efficiency PIN photodiode and an optical readout channel. The optical readout channel features a low-noise signal conditioning analog front end (AFE) that includes a 20-bit analog-to-digital converter (ADC) and industry-leading ambient light cancellation (ALC) circuit. Due to its low power consumption, compact size, ease of use and flexibility, the MAX86165 is ideal for use in a variety of optical sensing applications, such as heart rate detection and close detection in tight Spaces such as earplugs.

The MAX86165EFB is powered by a single supply of 2.7V to 5.5V VLED. Each device has a built-in 128-word FIFO. The MAX86165EFB is available in a 10-pin OLGA package with a size of 2mm x 2.5mm x 0.82mm and an operating temperature range of -40ºC to +85ºC.

Applications:

• Optimized for in-ear applications

• AR/VR glasses

• Miniature package for mobile applications

Block diagram:

Features:

Complete single channel optical data acquisition system in small module

Optimized architecture for reflective heart rate monitoring

Integrated infrared close detection

Provides continuous monitoring of optimized performance to detect heart rate variability (HRV)

High resolution 20-bit charge integrating ADC

Low noise 8-bit LED current DAC

Excellent signal-to-noise ratio (SNR) of up to 94.5dB in white card loopback tests

Excellent environmental range and inhibition

Ambient DC current up to 200μA

At 120Hz, the environmental suppression capability is 80dB

Ultra-low power consumption meets the requirements of wearable devices

Miniature 2mm x 2.5mm x 0.82mm 10-pin OLGA package