AFE4403

ACTIVE

Ultra-Small Integrated Analog Front End (AFE) for Heart-Rate Monitors and Low-Cost Pulse Oximeters

Product details

Applications Clinical fingertip pulse oximetry, SpO2 Number of input channels 1 Resolution (Bits) 22 Number of LEDs 3 Interface type SPI Operating temperature range (°C) -20 to 70 Rating Catalog
Applications Clinical fingertip pulse oximetry, SpO2 Number of input channels 1 Resolution (Bits) 22 Number of LEDs 3 Interface type SPI Operating temperature range (°C) -20 to 70 Rating Catalog
DSBGA (YZP) 36 10.5625 mm² 3.25 x 3.25
  • Fully-Integrated AFE for Pulse Oximeter and Heart Rate Monitoring Applications:
  • Transmit:
    • Integrated Dual LED Driver (H-Bridge or Common Anode)
    • Option for a Third LED Support for Optimized SPO2, HRM, or Multi-Wavelength HRM
    • Up to 110-dB Dynamic Range
    • LED Current:
      • Programmable to 100 mA with 8-Bit Current Resolution
    • 30 µA + Average LED Current
    • Programmable LED On-Time
    • Independent LED2 and LED1 Current Reference
  • Receive Channel with High Dynamic Range:
    • 22-Bit Output in Twos Complement Format
    • Up to 105-dB Dynamic Range
    • Low Power: < 650 µA
    • Dynamic Power-Down Mode to Reduce Current to 300 µA
    • Adaptable to a Very Wide Range of Signal Amplitudes:
      • Total Programmable Gain: 10 kΩ to 4 MΩ
    • Integrated Digital Ambient Estimation and Subtraction
  • Flexible Clocking by External Clock or Crystal:
    • Pulse Frequency: 62.5 SPS to 2000 SPS
    • Flexible Pulse sequencing and Timing Control
    • Input Clock Range: 4 MHz (Min) to 60 MHz (Max)
  • Integrated Fault Diagnostics:
    • Photodiode and LED Open and Short Detection
  • Supplies:
    • Rx = 2.0 V to 3.6 V
    • Tx = 3.0 V to 5.25 V
  • Package: Compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm)
  • Specified Temperature Range: 0°C–20°C to 70°C
  • Fully-Integrated AFE for Pulse Oximeter and Heart Rate Monitoring Applications:
  • Transmit:
    • Integrated Dual LED Driver (H-Bridge or Common Anode)
    • Option for a Third LED Support for Optimized SPO2, HRM, or Multi-Wavelength HRM
    • Up to 110-dB Dynamic Range
    • LED Current:
      • Programmable to 100 mA with 8-Bit Current Resolution
    • 30 µA + Average LED Current
    • Programmable LED On-Time
    • Independent LED2 and LED1 Current Reference
  • Receive Channel with High Dynamic Range:
    • 22-Bit Output in Twos Complement Format
    • Up to 105-dB Dynamic Range
    • Low Power: < 650 µA
    • Dynamic Power-Down Mode to Reduce Current to 300 µA
    • Adaptable to a Very Wide Range of Signal Amplitudes:
      • Total Programmable Gain: 10 kΩ to 4 MΩ
    • Integrated Digital Ambient Estimation and Subtraction
  • Flexible Clocking by External Clock or Crystal:
    • Pulse Frequency: 62.5 SPS to 2000 SPS
    • Flexible Pulse sequencing and Timing Control
    • Input Clock Range: 4 MHz (Min) to 60 MHz (Max)
  • Integrated Fault Diagnostics:
    • Photodiode and LED Open and Short Detection
  • Supplies:
    • Rx = 2.0 V to 3.6 V
    • Tx = 3.0 V to 5.25 V
  • Package: Compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm)
  • Specified Temperature Range: 0°C–20°C to 70°C

The AFE4403 is a fully-integrated analog front-end (AFE) ideally suited for pulse oximeter applications. The device consists of a low-noise receiver channel with an integrated analog-to-digital converter (ADC), an LED transmit section, and diagnostics for sensor and LED fault detection. The device is a very configurable timing controller. This flexibility enables the user to have complete control of the device timing characteristics. To ease clocking requirements and provide a low-jitter clock to the AFE4403, an oscillator is also integrated that functions from an external crystal. The device communicates to an external microcontroller or host processor using an SPI™ interface.

The device is a complete AFE solution packaged in a single, compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm) and is specified over the operating temperature range of –20°C to 70°C.

The AFE4403 is a fully-integrated analog front-end (AFE) ideally suited for pulse oximeter applications. The device consists of a low-noise receiver channel with an integrated analog-to-digital converter (ADC), an LED transmit section, and diagnostics for sensor and LED fault detection. The device is a very configurable timing controller. This flexibility enables the user to have complete control of the device timing characteristics. To ease clocking requirements and provide a low-jitter clock to the AFE4403, an oscillator is also integrated that functions from an external crystal. The device communicates to an external microcontroller or host processor using an SPI™ interface.

The device is a complete AFE solution packaged in a single, compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm) and is specified over the operating temperature range of –20°C to 70°C.

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Technical documentation

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* Data sheet AFE4403 Ultra-Small, Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters datasheet (Rev. C) PDF | HTML 18 Nov 2020
White paper Fortschrittliche Halbleitertechnologie für moderne Telemedizin-Anwendungen 28 Oct 2020
White paper 持續進化的現代遠距照護應用半導 體技術 28 Oct 2020
White paper Evolving Semiconductor Technologies for Modern Telehealth Applications 26 Oct 2020
Technical article Designing compact, efficient and high performing multiparameter patient monitors PDF | HTML 25 Jun 2019
Application note How to Design an SpO2 and OHRM System Using AFE4403 02 Mar 2015
EVM User's guide AFE4403EVM User's Guide (Rev. B) 21 Jul 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

AFE4403EVM — AFE4403 Integrated AFE for Heart-Rate Monitors and Pulse Oximeters Evaluation Module

The AFE4403EVM is intended for evaluating the AFE4403 device. The fully integrated AFE is ideally suited for Pulse Oximeter and Heart rate monitoring applications and consists of low noise receive channel, the LED transmit section and diagnostics for sensor and LED fault detection. The AFE4403 has (...)

User guide: PDF
Not available on TI.com
Driver or library

AFE4403SW-LINUX — Linux Driver for AFE4403

Driver or library

SLAC713 AFE4403 Driver Code for CC2640

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Supported products & hardware

Supported products & hardware

Products
Biosensing AFEs
AFE4403 Ultra-Small Integrated Analog Front End (AFE) for Heart-Rate Monitors and Low-Cost Pulse Oximeters
Low-power 2.4-GHz products
CC2640 SimpleLink™ 32-bit Arm Cortex-M3 Bluetooth® Low Energy wireless MCU with 128kB Flash
Firmware

SLAC677 AFE4403EVM Firmware Source v2.3

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
Biosensing AFEs
AFE4403 Ultra-Small Integrated Analog Front End (AFE) for Heart-Rate Monitors and Low-Cost Pulse Oximeters
Hardware development
Evaluation board
AFE4403EVM AFE4403 Integrated AFE for Heart-Rate Monitors and Pulse Oximeters Evaluation Module
Firmware

SLAC703 AFE4403 WristWatch EVM Firmware Source v2.3

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
Biosensing AFEs
AFE4403 Ultra-Small Integrated Analog Front End (AFE) for Heart-Rate Monitors and Low-Cost Pulse Oximeters
GUI for evaluation module (EVM)

SLAC672 AFE4403EVM GUI v2.2

lock = Requires export approval (1 minute)
Supported products & hardware

Supported products & hardware

Products
Biosensing AFEs
AFE4403 Ultra-Small Integrated Analog Front End (AFE) for Heart-Rate Monitors and Low-Cost Pulse Oximeters
Hardware development
Evaluation board
AFE4403EVM AFE4403 Integrated AFE for Heart-Rate Monitors and Pulse Oximeters Evaluation Module
Simulation model

AFE4403 IBIS Model

SBAM194.ZIP (28 KB) - IBIS Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDA-00311 — Miniaturized Pulse Oximeter Reference Design

This reference design is for a miniturized pulse oximeter specifically designed for high end clinical applications. The small form factor module can easily simplify and accelerate pulse oximeter system design. Featuring TI's AFE4403 Analog Front End for interfacing with the LED and Photodiode (...)
User guide: PDF
Schematic: PDF
Reference designs

TIDA-00301 — Miniaturized Optical Heart Rate Reference Design

This reference design is for a miniaturized Optical Heart Rate Monitor measurement solution (no chest strap!) specifically targeted for wearable and mobile applications. The small form factor module can easily interface to smartphones, tablets, and wearables. With TI's AFE4403 AFE, you can (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
DSBGA (YZP) 36 View options

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