Texas Instruments PGA308EVM User manual

PGA308EVM
User's Guide
Literature Number: SBOU060A
July 2008–Revised September 2016

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Contents
Contents
Preface ........................................................................................................................................ 4
1 Overview............................................................................................................................. 5
1.1 PGA308EVM Hardware..................................................................................................... 6
2 System Setup ...................................................................................................................... 7
2.1 Theory of Operation for the PGA308 Test Board Hardware........................................................... 8
2.2 Signal Definition of J1 (25-Pin Male DSUB) on the PGA308 Test Board ............................................ 9
2.3 Signal Definition of J2 (25-Pin Female DSUB) on the PGA308 Test Board........................................ 10
2.4 Theory of Operation For the USB DAQ Platform ...................................................................... 11
3 Hardware Connections and Jumper Settings......................................................................... 12
3.1 Typical Hardware Connections........................................................................................... 12
3.2 Connecting the Hardware................................................................................................. 13
3.3 Connecting Power.......................................................................................................... 14
3.4 Connecting the USB Cable to the PGA308EVM....................................................................... 15
3.5 Jumper Settings ............................................................................................................ 16
4 PGA308 Software Overview ................................................................................................. 19
4.1 Operating Systems for the PGA308 Software.......................................................................... 19
4.2 PGA308EVM Software Install ............................................................................................ 19
4.3 Starting the PGA308EVM Software...................................................................................... 20
4.4 Using the PGA308 Software.............................................................................................. 23
4.4.1 Block Diagram ..................................................................................................... 23
4.4.2 Registers in OTP .................................................................................................. 23
4.4.3 Registers in RAM.................................................................................................. 23
4.4.4 Calibration.......................................................................................................... 23
4.4.5 Simulation .......................................................................................................... 23
4.4.6 Graph ............................................................................................................... 23
4.5 EVM Pull-Down Menus.................................................................................................... 24
4.5.1 PGA308 Controls.................................................................................................. 24
4.5.2 USB Controls ...................................................................................................... 24
4.5.3 Help ................................................................................................................. 25
A Bill of Materials .................................................................................................................. 26
A.1 Resistors and Capacitors.................................................................................................. 26
A.2 Active Devices and Miscellaneous....................................................................................... 27
Revision History.......................................................................................................................... 28

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List of Figures
List of Figures
1-1. Hardware Included With the PGA308EVM............................................................................... 6
2-1. Hardware Setup for the PGA308EVM .................................................................................... 7
2-2. Block Diagram of the PGA308 Test Board............................................................................... 8
2-3. Theory of Operation For the USB DAQ Platform ...................................................................... 11
3-1. Typical Hardware Connections........................................................................................... 12
3-2. Connecting the Two EVM PCBs ......................................................................................... 13
3-3. Connecting Power to the EVM ........................................................................................... 14
3-4. Connecting the USB Cable ............................................................................................... 15
3-5. Default Jumper Settings................................................................................................... 16
4-1. PGA308EVM Software—Functioning Properly......................................................................... 20
4-2. PGA308EVM Software—No Communication with the USB DAQ Platform......................................... 21
4-3. PGA308EVM Software—No Communication from USB DAQ Platform to PGA308 .............................. 22
4-4. PGA308 Controls........................................................................................................... 24
4-5. USB Controls ............................................................................................................... 24
4-6. Current Revision of Software ............................................................................................. 25
List of Tables
2-1. Signal Definition of J1....................................................................................................... 9
2-2. Signal Definition of J2 ..................................................................................................... 10
3-1. PGA308 Test Board Jumper Function................................................................................... 17
3-2. USB DAQ Platform Jumper Settings (5-V Power Supply)............................................................ 18
A-1. Bill of Materials ............................................................................................................. 26
A-2. Bill of Materials ............................................................................................................. 27

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PGA308EVM
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All other trademarks are the property of their respective owners.
Preface
SBOU060A–July 2008–Revised September 2016
PGA308EVM
About This Manual
This user's guide describes the characteristics, operation, and use of the PGA308 evaluation module
(EVM). It discusses the processes and procedures required to properly use this EVM board. This
document also includes the physical printed circuit board (PCB) layout, schematic diagram, and circuit
descriptions.
Related Documentation from Texas Instruments
The following documents provide information regarding Texas Instruments integrated circuits used in the
assembly of the PGA308EVM. These documents are available from the TI web site under the respective
literature number (for example, SBxxnnn). Any letter appended to the literature number corresponds to the
document revision that is current at the time of the writing of this User’s Guide. Newer revisions may be
available from the TI web site at www.ti.com, or call the Texas Instruments Literature Response Center at
[phone] or the Product Information Center at [phone]. When ordering, identify the
document by both title and literature number.
Document Literature Number
PGA308 SBOS440
XTR116 SBOS124
TUSB3210 SLLS466
USB DAQ Platform SBOU056
Information About Cautions and Warnings
This document contains caution statements.
CAUTION
This is an example of a caution statement. A caution statement describes a
situation that could potentially damage your software or equipment.
The information in a caution or a warning is provided for your protection. Read each caution carefully.
FCC Warning
This equipment is intended for use in a laboratory test environment only. It generates, uses, and can
radiate radio frequency energy and has not been tested for compliance with the limits of computing
devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable
protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense is required to
take whatever measures may be required to correct this interference.

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Overview
Chapter 1
SBOU060A–July 2008–Revised September 2016
Overview
This document provides the information needed to set up and operate the PGA308EVM evaluation
module, a test platform for the PGA308 Programmable Bridge Sensor. For a more detailed description of
this device, see the PGA308 product data sheet (SBOS440) available from the Texas Instruments web
site at www.ti.com. Support documents are listed in the section of this guide entitled Related
Documentation from Texas Instruments.
The PGA308EVM is an evaluation module that is used to fully evaluate the PGA308 device. The PGA308
is a mixed-signal programmable gain amplifier that has high resolution gain and offset adjustment
capability.
The PGA308EVM consists of two PCBs. One board generates the digital signals (USB DAQ Platform)
required to communicate with the PGA308 (PGA308_Test_Board), and the second board contains the
PGA308, as well as support and configuration circuitry.
Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with
the PGA308EVM.

Power Cord USB Cable
DAQ Platform
PGA 308 Test
Form
PGA308EVM Hardware www.ti.com
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Overview
1.1 PGA308EVM Hardware
Figure 1-1 shows the hardware included with the PGA308EVM kit. Contact the factory if any component is
missing. TI highly recommendeds that you check the TI web site (at http://www.ti.com) to verify that you
have the latest software.
The complete kit includes the following items:
• PGA308 test PCB
• USB DAQ platform PCB
• USB cable
• Power cord
Figure 1-1. Hardware Included With the PGA308EVM

USB DAQ
Platform
PGA 308
Test Board
EVM
Power
Sensor
Connection
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System Setup
Chapter 2
SBOU060A–July 2008–Revised September 2016
System Setup
Figure 2-1 shows the system setup for the PGA308EVM. The PC runs software that communicates with
the USB DAQ platform. The USB DAQ platform generates the digital signals used to communicate with
the PGA308 test board. Connectors on the PGA308 test board allow for connection to the system that will
be monitored by the user.
Minimim PC operating requirements:
• Microsoft®Windows®XP or higher (including Windows Vista™)
• USB port
• Works on US or European regional settings
Figure 2-1. Hardware Setup for the PGA308EVM

PGA 308
One - Wire
Interface
VDUT (5.0 V Power)
Connection to
Sensor
25-Pin Male DSUB Signals
from USB DAQ Platform Sensor
Emulator
4-20 mA
V/I
Reference
Connection
to VOUT
Connection
to VREF
Connection
to VCLAMP
Configure
Clamp
25-Pin Female DSUB
Signals from USB DAQ
Platform
Theory of Operation for the PGA308 Test Board Hardware www.ti.com
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System Setup
2.1 Theory of Operation for the PGA308 Test Board Hardware
Figure 2-2 shows the block diagram of the PGA308 test board. The PGA308 test board functionality is
relatively simple. It provides connections to the one-wire interface, digital-to-analog converter (DAC),
analog-to-digital converter (ADC), and general-purpose inputs/outputs (GPIOs) on the USB DAQ platform.
It also provides connection points for external connection of the bridge sensor, reference, and outputs.
Figure 2-2. Block Diagram of the PGA308 Test Board
See SBOR004 for the PGA308 test board schematic, available for download at www.ti.com.

www.ti.com Signal Definition of J1 (25-Pin Male DSUB) on the PGA308 Test Board
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System Setup
2.2 Signal Definition of J1 (25-Pin Male DSUB) on the PGA308 Test Board
Table 2-1 shows the different signals connected to J1 on the PGA308 test board. Table 2-1 also identifies
signals connected to pins on J1 that are not used on the PGA308 test board.
Table 2-1. Signal Definition of J1
Pin Number Signal Name from USB
DAQ Platform Description
1 DAC_A To input amplifier (sensor emulator); 16-bit string DAC A output.
2 DAC_B To input amplifier (sensor emulator); 16-bit string DAC B output.
3 DAC_C To input amplifier (sensor emulator); 16-bit string DAC C.
4 DAC_D Not used
5 ADS1_VIN+ To PGA308 output; 16-bit delta-sigma (ΔΣ) ADC #1 positive input.
6 ADS1_VIN– Grounded for single-ended measurements; 16-bit ΔΣ ADC #1 negative
input.
7 ADS2_VIN+ PGA308 VIN2 input; 16-bit ΔΣ ADC #2 positive input.
8 ADS2_VIN– PGA308 VIN1 input; 16-bit ΔΣ ADC #2 negative input.
9 I2C_SCK Not used
10 I2C_SDA2 Not used
11 ONE_WIRE PGA308 1W pin; one-wire signal
(derived from the UART on the TUSB3210 device).
12 I2C_SDA_ISO Not used
13 I2C_SCK_ISO Not used
14 XTR+LOOP To XTR116 pin 7 on EVM. Current-loop positive-loop connection; this
signal is connected to the positive-loop supply.
15 XTR–LOOP To XTR116 pin 4 on EVM. Current-loop negative-loop connection; this
signal connects the DUT current output to the current measurement circuit.
16 INA– Not used
17 VDUT To PGA308 VS power-supply pin; switched 3 V or 5 V supply.
18 VCC Not used
19 +15V Not used
20 –15V Not used
21 GND Ground
22 SPI_SCK Not used
23 SPI_CS1 Not used
24 SPI_DOUT1 Not used
25 SPI_DIN1 Not used

Signal Definition of J2 (25-Pin Female DSUB) on the PGA308 Test Board www.ti.com
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System Setup
2.3 Signal Definition of J2 (25-Pin Female DSUB) on the PGA308 Test Board
Table 2-2 shows the different signals connected to J2 on the PGA308 test board. Table 2-2 also identifies
signals connected to pins on J2 that are not used on the PGA308 test board.
Table 2-2. Signal Definition of J2
Pin Number Signal Name from USB
DAQ Platform Description
1 P3.3 Not used
2 CTRL1 Not used
3 CTRL2 Not used
4 CTRL3 Not used
5 CTRL4 Not used
6 CTRL5 Not used
7 CTRL6 Not used
8 CTRL7 Not used
9 CTRL8 Not used
10 MEAS1 To DOUT on the PGA308. This pin is a measure bit that can read logic
signals; it is part of an 8-bit group.
11 MEAS2 Not used
12 MEAS3 Not used
13 MEAS4 Not used
14 MEAS5 Not used
15 MEAS6 Not used
16 MEAS7 Not used
17 MEAS8 Not used
18 SPI_SCK Not used
19 SPI_CS2 Not used
20 SPI_DOUT2 Not used
21 SPI_DIN2 Not used
22 VDUT Not used
23 VCC Not used
24 GND Not used
25 GND Not used