Texas Instruments PGA309EVM-USB - Manual

User's Guide
SBOU084 – February 2010
PGA309EVM-USB
This user’s guide describes the characteristics, operation, and use of the PGA309EVM-USB evaluation
module (EVM). This EVM is designed to evaluate the performance of the
PGA309 , 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. A
schematic 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-Platform and 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-USB Software: Auto Calibrate Tab—Sensor Definition .............................................. 29
20 PGA309EVM-USB Software: Sensor Emulator Control Panel Tool ................................................ 30
21 PGA309EVM-USB Software: Auto Calibrate Tab—PGA Setup
.....................................................
31
22 PGA309EVM-USB Software: Auto Calibrate Tab—Two-Point Calibration and Linearization
...................
32
23 PGA309EVM-USB Software: Auto Calibrate Tab—Temperature Error Compensation .......................... 33
24 PGA309EVM-USB Software: Auto Calibrate Tab—Post Cal Error Check ......................................... 34
25 PGA309EVM-USB Software: Auto Calibrate Tab—DMM Options .................................................. 35
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1 SBOU084 – February 2010 PGA309EVM-USB
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