Texas Instruments PGA309EVM-USB User Manual
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User's Guide

SBOU084 – February 2010

PGA309EVM-USB

This user’s guide describes the characteristics, operation, and use of the PGA309EVM-USBevaluation module (EVM). This EVM is designed to evaluate the performance of thePGA309, a voltage output, programmable sensor conditioner. This document covers all pertinent areas involved to properly use this EVM board, allowing for user evaluation suitable to a variety of applications. This document also includes the physical printed circuit board (PCB) layout and circuit descriptions. Aschematic of the PGA309EVM-USB is available as a separate download from the TI web site.

 

Contents

 

 

1

Introduction and Overview .................................................................................................

 

2

2

System Setup ................................................................................................................

 

5

3

PGA309EVM-USB Hardware Setup ....................................................................................

 

16

4

PGA309EVM-USB Software Overview .................................................................................

 

25

 

List of Figures

 

 

1

Hardware Included with the INA282-286EVM...........................................................................

 

3

2

PGA309EVM-USB Hardware Setup......................................................................................

 

5

3

PGA309_Test_Board Block Diagram ....................................................................................

 

5

4

PGA309_Test_Board Schematic: Input Circuitry .......................................................................

 

7

5

PGA309_Test_Board Schematic: Power, Reference, and Digital Connections ....................................

 

8

6

PGA309_Test_Board Schematic: Output Circuitry .....................................................................

 

9

7

PGA309_Test_Board Schematic: Sensor Emulator Circuitry........................................................

 

10

8

PGA309_Test_Board Connections to USB-DAQ-Platformand EEPROM.........................................

 

11

9

Theory of Operation For USB-DAQ-Platform ..........................................................................

 

16

10

PGA309EVM-USB Typical Hardware Connections ...................................................................

 

17

11

Connecting the Two EVM PCBs ........................................................................................

 

18

12

Connecting Power to the EVM...........................................................................................

 

19

13

Connecting the USB Cable...............................................................................................

 

20

14

Default Jumper Settings (PGA309_Test_Board)......................................................................

 

21

15

Default Jumper Settings (USB-DAQ-Platform) ........................................................................

 

22

16

PGA309EVM-USB Software: Registers Tab...........................................................................

 

26

17

PGA309EVM-USB Software: EEPROM Tab ..........................................................................

 

27

18

PGA309EVM-USB Software: Block Diagram ..........................................................................

 

28

19

PGA309EVM-USBSoftware: Auto Calibrate Tab— Sensor Definition..............................................

 

29

20

PGA309EVM-USBSoftware: Sensor Emulator Control Panel Tool................................................

 

30

21

PGA309EVM-USBSoftware: Auto Calibrate Tab— PGA Setup.....................................................

 

31

22

PGA309EVM-USBSoftware: Auto Calibrate Tab—Two-PointCalibration and Linearization...................

32

23

PGA309EVM-USBSoftware: Auto Calibrate Tab— Temperature Error Compensation..........................

 

33

24

PGA309EVM-USBSoftware: Auto Calibrate Tab— Post Cal Error Check.........................................

 

34

25

PGA309EVM-USBSoftware: Auto Calibrate Tab— DMM Options..................................................

 

35

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I2C is a trademark of NXP Semiconductors.

 

 

All other trademarks are the property of their respective owners.

 

 

SBOU084 –February2010

PGA309EVM-USB

1

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