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User's Guide
SLAU480C–January 2013–Revised May 2014
AFE4400 and AFE4490 Development Guide
This user’s guide describes the characteristics, operation, and use of the AFE44x0SPO2EVM
demonstration kit. This demonstration kit is an evaluation module (EVM) for the AFE4400 and AFE4490
family of devices. The family of devices are fully-integrated AFE, ideally suited for pulse oximeter
applications. The EVM is intended for prototyping and evaluation. This user’s guide includes a complete
circuit description, schematic diagram, and bill of materials.
The following related documents are available through the Texas Instruments website at www.ti.com.
Device Literature Number
AFE4400 SBAS601
AFE4490 SBAS602
Contents
1 AFE44x0SPO2EVM Overview............................................................................................. 2
1.1 Important Disclaimer Information ................................................................................. 2
2 Overview...................................................................................................................... 3
2.1 Introduction .......................................................................................................... 3
2.2 AFE44x0SPO2EVM Kit Contents................................................................................. 3
2.3 Features Supported in this Version .............................................................................. 3
3 Software Installation......................................................................................................... 4
3.1 Minimum Requirements............................................................................................ 4
3.2 Installing the Software (PC Application) ......................................................................... 5
3.3 Installing the USB Drivers ......................................................................................... 8
4 Running the Software...................................................................................................... 15
4.1 Overview of the Features ........................................................................................ 15
5 AFE44x0SPO2EVM Hardware ........................................................................................... 27
5.1 Power Supply...................................................................................................... 29
5.2 Clock................................................................................................................ 29
5.3 Accessing AFE44x0 Digital Signals............................................................................. 30
5.4 Analog Inputs ...................................................................................................... 30
5.5 USB Interface...................................................................................................... 30
5.6 On-Board Key Interface .......................................................................................... 30
5.7 Visual Indication................................................................................................... 31
6 USB-Based Firmware Upgrade .......................................................................................... 31
7 GUI Update ................................................................................................................. 33
8 Connector Interface........................................................................................................ 34
8.1 DB9 Pulse Oximeter Connector................................................................................. 34
8.2 Mini USB Connector .............................................................................................. 34
9 Quick Start Guide .......................................................................................................... 36
10 AFE44x0SPO2EVM FAQs................................................................................................ 37
10.1 EVM Communicating With the PC Application................................................................ 37
10.2 ADC_RDY Signal.................................................................................................. 37
10.3 Check TXP and TXM Waveforms............................................................................... 38
10.4 Using an External ADC (Bypass ADC Mode) (Available Only for AFE4490 Device) .................... 39
10.5 Diagnostics......................................................................................................... 39
10.6 Automation of Register Read and Write Operations.......................................................... 39
10.7 Optimum Viewing Experience on Windows 7 OS............................................................. 40
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SLAU480C–January 2013–Revised May 2014 AFE4400 and AFE4490 Development Guide
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