Top

Product details

Parameters

Number of input channels 1 Resolution (Bits) 22 Interface SPI Number of LEDs 2 Features Optical biosensing Operating temperature range (C) 0 to 70 Approx. price (US$) 2.60 | 1ku open-in-new Find other Biosensing AFEs

Package | Pins | Size

VQFN (RHA) 40 36 mm² 6 x 6 open-in-new Find other Biosensing AFEs

Features

  • Fully-Integrated Analog Front-End for Pulse Oximeter Applications:
    • Flexible Pulse Sequencing and
      Timing Control
  • Transmit:
    • Integrated LED Driver
      (H-Bridge, Push, or Pull)
    • Dynamic Range: 95 dB
    • LED Current:
      • Programmable to 50 mA with 8-Bit Current Resolution
    • Low Power:
      • 100 µA + Average LED Current
    • Programmable LED On-Time
    • Independent LED2 and LED1 Current Reference
  • Receive Channel with High Dynamic Range:
    • 13 Noise-Free Bits
    • Low Power: < 670 µA at 3.3-V Supply
    • Integrated Digital Ambient Estimation and Subtraction
    • Flexible Receive Sample Time
    • Flexible Transimpedance Amplifier with Programmable LED Settings
  • Integrated Fault Diagnostics:
    • Photodiode and LED Open and
      Short Detection
    • Cable On and Off Detection
  • Supplies:
    • Rx = 2.0 V to 3.6 V
    • Tx = 3.0 V to 5.25 V
  • Package: Compact VQFN-40 (6 mm × 6 mm)
  • Specified Temperature Range: 0°C to 70°C
open-in-new Find other Biosensing AFEs

Description

The AFE4400 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 AFE4400, 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 VQFN-40 package (6 mm × 6 mm) and is specified over the operating temperature range of 0°C to 70°C.

open-in-new Find other Biosensing AFEs
Download

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet AFE4400 Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters datasheet (Rev. H) Jul. 24, 2014
Technical articles Consumer electronics benefit from analog technology Jan. 21, 2015
User guides AFE44x0SPO2EVM User's Guide (Rev. C) May 27, 2014
Technical articles Life-saving technologies to the rescue Mar. 06, 2014
Technical articles A new way to illuminate the human condition Dec. 30, 2013
Technical articles Oximeter signaling: There’s more than meets the eye Dec. 04, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$149.00
Description

The AFE44x0SPO2EVM is intended for evaluating AFE4400 and AFE4490 devices. The family of devices are fully integrated AFE ideally suited for Pulse Oximeter applications and consist of low noise receive channel, the LED transmit section and diagnostics for sensor and LED fault detection. The (...)

Features
  • DB9 pulse oximeter sensor cable support
  • Acquire data at up to 3000Hz in evaluation mode
  • USB based power and PC application connectivity
  • Access to all AFE44x0 registers via an easy to use GUI
EVALUATION BOARDS Download
document-generic User guide
$149.00
Description

The AFE44x0SPO2EVM is intended for evaluating AFE4400 and AFE4490 devices. The family of devices are fully integrated AFE ideally suited for Pulse Oximeter applications and consist of low noise receive channel, the LED transmit section and diagnostics for sensor and LED fault detection. The (...)

Features
  • DB9 pulse oximeter sensor cable support
  • Acquire data at up to 3000 Hz in evaluation mode
  • USB based power and PC application connectivity
  • Access to all AFE44x0 registers via an easy to use GUI
GUIS FOR EVALUATION MODULES (EVM) Download
SLAC556D.ZIP (188007 KB)

Software development

FIRMWARE Download
SLAC678A.ZIP (5101 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM167.ZIP (17 KB) - IBIS Model

Reference designs

REFERENCE DESIGNS Download
Biometric Steering Wheel Reference Design
TIDA-00292 This reference design is for a concept demonstration of how a driver's pulse rate, respiration rate, and ECG based heart rate can be obtained from a vehicle steering wheel.  AFE4400 and AFE4300 from TI's biometric family of analog front-ends (AFE), enables acquisition of all three parameters via (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Optical Heart Rate Monitor Reference Design with BLE Connectivity
TIDA-00011 This reference design is for a complete Optical Heart Rate Monitor wrist watch (no chest strap!) end equipment featuring TI signal chain, power, and connectivity components. With TI's AFE4400 AFE, you can accelerate and simplify your wrist based HRM design while still ensuring measurement (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RHA) 40 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

AFE4400 and AFE4490 - Family of AFES for Photometry

AFE4400 and AFE4490 - Family of AFES for Photometry

Posted: 21-Dec-2012
Duration: 04:01

Order samples and EVM today!

Related videos