TIAFE4404YZPR
Overview
The AFE4404YZPR is a highly integrated analog front-end (AFE) specifically designed for optical bio-sensing applications such as Heart Rate Monitoring (HRM) and Pulse Oximetry (SpO2). It combines a flexible LED driver, a low-noise receiver channel with a 24-bit ADC, and advanced timing control into a compact 15-DSBGA package. The device excels at extracting physiological signals in the presence of high ambient light by utilizing integrated digital ambient subtraction and individual DC offset subtraction DACs.
Why Choose This Part
This AFE provides a significant board space reduction by integrating the LED drivers and timing controller into a 1.6mm x 2.6mm footprint. It offers superior signal integrity via digital ambient light cancellation and individual DC offset subtraction, ensuring high dynamic range even in bright outdoor environments. The ultra-low power architecture, featuring a 3uA standby mode, is ideal for battery-constrained wearable devices.
Applications
Key Specifications
Getting Started
Evaluation can be performed using the AFE4404EVM, which allows for rapid configuration of LED pulse sequences and timing via a GUI. For firmware development, interface with the device over I2C using the register map to configure the programmable timing engine and read the 24-bit conversion results. Ensure the analog and digital supplies are maintained between 2V and 3.6V for proper operation.
