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AFE4405 Datasheet Integrated Analog Front-End

Manufacturer: Texas Instruments

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General Description

The AFE4405 is an analog front-end (AFE) for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2).

The device supports three switching light-emitting diodes (LEDs) and up to two photodiodes.

The current from the photodiode is converted into voltage by the transimpedance amplifier (TIA) and digitized using an analog-to-d

Overview

Product Folder Order Now Technical Documents Tools & Software Support & Community AFE4405 SBAS768C – APRIL 2016 – REVISED JULY 2019 AFE4405 Ultra-Small, Integrated AFE with FIFO for Wearable, Optical Heart-Rate.

Key Features

  • 1 Transmitter:.
  • Supports Common Anode LED Configuration.
  • Dynamic Range: 100 dB.
  • 8-Bit Programmable LED Current to 50 mA (Extendable to 100 mA).
  • Programmable LED On-Time.
  • Simultaneous Support of 3 LEDs for Optimized SpO2, HRM, or Multi-Wavelength HRM.
  • Receiver:.
  • Supports 2 Time-Multiplexed Photodiode Inputs.
  • 24-Bit Representation of the Current Input from the Photodiode in Twos Complement Format.
  • Individual.

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