TIAFE4404

Overview

The AFE4404 is a highly integrated analog front-end (AFE) designed specifically for optical bio-sensing applications such as heart-rate monitoring and pulse oximetry. It combines a low-noise receive channel with an integrated ADC, an LED transmit section, and diagnostics in a compact DSBGA package to minimize board space in wearable devices.

Why Choose This Part

This AFE features a flexible transmit and receive architecture that supports up to three LEDs and a single photodiode, allowing for multi-wavelength measurements. Its low power consumption and integrated LED drivers help extend battery life while the 22-bit ADC provides high dynamic range for robust signal acquisition under varying skin conditions.

Applications

Getting Started

Development is supported by the AFE4404EVM evaluation module, which connects to a PC via USB for configuration and data visualization. Engineers can use the GUI provided by TI to tune LED currents and timing parameters before implementing the I2C-based communication protocol in their firmware.

AFE4404 Family

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