Texas Instruments AFE4490 Evaluation Module AFE4490SPO2EVM AFE4490SPO2EVM Datenbogen
Produktcode
AFE4490SPO2EVM
Overview
2
Overview
2.1
Introduction
NOTE:
From this point on, unless otherwise noted, AFE44x0 refers to AFE4400- and AFE4490-
based demonstration kits.
The EVM is intended for evaluating AFE4400 and AFE4490 devices. The family of devices consist of a
low-noise receive channel, the LED transmit section, and diagnostics for sensor and LED fault detection.
The AFE44x0 has a highly configurable timing controller, enabling complete control of the device’s timing
characteristics. The device also has an integrated oscillator working off an external crystal to ease
clocking requirements and provide a low-jitter clock to the AFE44x0. The device communicates to an
external host processor using the Serial Peripheral Interface (SPI). The purpose of the EVM is to expedite
evaluation and system development activities related to AFE44x0 devices. The AFE4490SPO2EVM
demonstration kit is shown in
low-noise receive channel, the LED transmit section, and diagnostics for sensor and LED fault detection.
The AFE44x0 has a highly configurable timing controller, enabling complete control of the device’s timing
characteristics. The device also has an integrated oscillator working off an external crystal to ease
clocking requirements and provide a low-jitter clock to the AFE44x0. The device communicates to an
external host processor using the Serial Peripheral Interface (SPI). The purpose of the EVM is to expedite
evaluation and system development activities related to AFE44x0 devices. The AFE4490SPO2EVM
demonstration kit is shown in
.
Figure 1. AFE4490SPO2EVM Demonstration Kit
The board can be assembled with either of these devices. Check the TI website for the
and
demonstration kits. The MSP430 firmware and PC
application are designed to automatically detect and configure to the installed part.
Throughout the document, the term demonstration kit is synonymous with AFE44x0SPO2EVM.
2.2
Features Supported in this Version
1. DB9 pulse oximeter sensor cable support
2. Two modes of operation: Evaluation and Live % SpO2 / Heart rate
3. Acquire data at up to 1300 Hz in evaluation mode
4. USB-based power and PC application connectivity
5. Access to all AFE44x0 registers via an easy-to-use GUI
6. Built-in time domain, histogram, FFT and % SpO2 / heart rate related analysis on the PC application
7. Live % SpO2 with heart rate calculation
8. USB-based firmware upgrade option
4
AFE4400 and AFE4490 Development Guide
SLAU480A – January 2013 – Revised February 2013
Copyright © 2013, Texas Instruments Incorporated