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AFE4490

TIAFE4490

Texas Instruments
A dedicated analog front-end for pulse oximetry/PPG that offers a different integration approach for designers needing discrete AFE flexibility.
NRND617 in stock
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Overview

The AFE4490 is a fully-integrated analog front-end designed specifically for pulse oximeters and photoplethysmography (PPG) applications. It combines a low-noise receive channel with an H-bridge LED driver and a flexible timing controller into a single 40-pin VQFN package.

Why Choose This Part

The AFE4490 simplifies hardware design by integrating the transimpedance amplifier (TIA) with seven programmable feedback settings and a 22-bit ADC. Its sophisticated analog and digital ambient cancellation schemes ensure signal integrity in diverse lighting conditions while reducing the burden on the host MCU.

Applications

Clinical Pulse Oximetry
High-accuracy SpO2 monitoring using its 110-dB dynamic range and ambient light cancellation.
Wearable Heart Rate Monitors
Integrated LED drivers and low power consumption make it suitable for continuous PPG sensing in wrist-worn devices.
Medical Diagnostics
Utilizes integrated fault diagnostics for detecting open or shorted LEDs and photodiode failures in medical environments.

Getting Started

Designers should begin with the AFE4490EVM evaluation module to test the signal chain performance. Communication is handled via a standard SPI interface, and the internal timing controller can be configured to manage the entire LED pulse and ADC sampling sequence automatically.

AFE4490 Family

Part NumberDifferenceStock
AFE4490IDR IDR —
AFE4490IDBVT IDBVT —

Also Consider

MAX30101 Analog Devices / Maxim Integrated - An integrated module that includes the LEDs and photodetector within the package for extreme space savings.

Categories

Interface ICs > ADC & DAC