Texas instruments PGA112EVM User Manual
User's Guide
SBOU073A–February 2009–Revised May 2012
PGA112EVM and PGA113EVM User’s Guide
This user's guide describes the characteristics, operation, and use of the PGA112EVM and PGA113EVM
evaluation boards. It also describes how to set up and configure the software and hardware, and reviews
various aspects of program operation. Throughout this document, the terms PGA112EVM, PGA113EVM,
PGA112EVM/PGA113EVM, evaluation board, evaluation module, and EVM are synonymous with the
PGA112EVM and PGA113EVM. This user's guide also includes information regarding operating
procedures and input/output connections, an electrical schematic, printed circuit board (PCB) layout
drawings, and a parts list for the EVM.
Contents
1 Overview ..................................................................................................................... 2
2 EVM Hardware Setup ...................................................................................................... 3
3 EVM Hardware Overview .................................................................................................. 5
4 EVM Software Setup ....................................................................................................... 7
5 EVM Software Overview ................................................................................................... 9
6 EVM Documentation ...................................................................................................... 13
List of Figures
1 Hardware Setup............................................................................................................. 3
2 EVM Block Diagram ........................................................................................................ 3
3 SM-USB-DIG Platform Block Diagram................................................................................... 4
4 Typical EVM Hardware Connections..................................................................................... 5
5 Confirmation of SM-USB-DIG Platform Driver Installation............................................................. 5
6 PGA112EVM Hardware (Note that the PGA113EVM is identical except for the device name).................. 6
7 EVM Installer Files.......................................................................................................... 7
8 Install Path................................................................................................................... 8
9 EVM Software Interface.................................................................................................... 9
10 Communication Error with SM-USB-DIG Platform.................................................................... 10
11 Read, Write, and Auto-Write Buttons................................................................................... 10
12 Individual Bits Panel and Help w Reg Button.......................................................................... 11
13 Setting DVDD Voltage .................................................................................................... 11
14 Input Mux Configuration .................................................................................................. 12
15 Setting the Gain ........................................................................................................... 12
16 EVM Schematic............................................................................................................ 14
17 PCB Component Layout.................................................................................................. 15
List of Tables
1 Contents of PGA112EVM or PGA113EVM Kit.......................................................................... 2
2 SM-USB-DIG Pin Definitions .............................................................................................. 4
3 EVM Bill of Materials ..................................................................................................... 13
Windows, Windows XP are trademarks of Microsoft Corporation.
I2C is a trademark of NXP Semicinductors.
All other trademarks are the property of their respective owners.
SBOU073A–February 2009–Revised May 2012 PGA112EVM and PGA113EVM User’s Guide
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Overview
1 Overview
The PGA112 And PGA113 are programmable gamma-voltage generators featuring two banks of 16
programmable gamma channels and programmable, high slew rate VCOM channels. All channels are
programmable through a high-speed, I2C™ interface and support up to 20-V supply-voltage operation.
1.1 EVM Kit Contents
Table 1 lists the contents of the PGA112EVM or PGA113EVM kit. Contact the Texas Instruments Product
Information Center nearest you if any component is missing. It is highly recommended that you check the
TI web site at http://www.ti.com to verify that you have the latest versions of the related software.
Table 1. Contents of PGA112EVM or PGA113EVM Kit
Item Quantity
PGA112EVM or PGA113EVM PCB Evaluation Board 1
SM-USB-DIG Platform PCB 1
USB Extender Cable 1
SM-USB-DIG Connector Ribbon Cable 1
User’s Guide CD-ROM 1
1.2 Related Documentation from Texas Instruments
The following document provides information regarding Texas Instruments integrated circuits used in the
assembly of the PGA112EVM and PGA113EVM. This user's guide is available from the TI web site under
literature number SBOU073. Any letter appended to the literature number corresponds to the document
revision that is current at the time of the writing of this document. Newer revisions may be available from
the TI web site at http://www.ti.com/, or call the Texas Instruments Literature Response Center at (800)
477-8924 or the Product Information Center at (972) 644-5580. When ordering, identify the document by
both title and literature number.
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Document Literature Number
PGA112/PGA113 Product Data Sheet SBOS424
SM-USB-DIG Platform User's Guide SBOU098
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2 EVM Hardware Setup
This section describes the overall system setup for the PGA112EVM and PGA113EVM. The SM-USB-DIG
Platform provides power and the digital signals used to communicate with the PGA112EVM or
PGA113EVM board through software installed on your PC. An input signal and multimeter can be
attached to the available connectors on the PGA112EVM and PGA113EVM boards. Figure 1 shows the
hardware setup.
EVM Hardware Setup
Figure 1. Hardware Setup
2.1 Theory of Operation for the PGA112 and PGA113 Hardware
A block diagram of the test-board hardware setup is shown in Figure 2. The EVM board provides test
points to the communication inputs. The EVM board also provides power and ground connections (from
the SM-USB-DIG Platform board or an external power supply; see Section 3.4). The EVM board also
provides test points for the analog inputs and output of the PGA112 (or PGA113) device. The
PGA112EVM and PGA113EVM feature a test point for the VREF input of the PGA112 and PGA113,
respectively. By default, VREF is shorted to ground, but can be disconnected with the removal of R2.
Figure 2. EVM Block Diagram
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TUSB3210
8052 mC
w/USB Interface
and UART
USB Bus
from
Computer
3.3-V
Regulator
+3.3 V
USB
+5.0 V
8K x 8 Byte
EEPROM
Buffers and
Level
Translators
Power
Switching
Vdut
(Hi-Z, 3.3 V, or 5 V)
Switched Power
I2C
SPI
Control Bits
Measure Bits
Power on
Reset
SM-USB-DIG Platform
To Test Board
To Computer and Power Supplies
+3.3 V
USB +5.0 V
EVM Hardware Setup
2.2 Signal Definitions of J1 (10-Pin Male Connector Socket)
Table 2 shows the pin out for the 10-pin connector socket used to communicate between the EVM and the
SM-USB-DIG. Note that the EVM uses only the I2C communication lines, VDUT (pin 6), GND (pin 8), and
CTRL/MEAS4 (pin 2).
Table 2. SM-USB-DIG Pin Definitions
Pin on U1 Signal Description
1 I2C_SCL I2C clock signal (SCL)
2 CTRL/MEAS4 GPIO. Control output or measure input
3 I2C_SDA1 I2C data signal (SDA)
4 CTRL/MEAS5 GPIO. Control output or measure input
5 SPI_DOUT1 SPI data output (MOSI)
6 VDUT
7 SPI_CLK SPI clock signal (SCLK)
8 GND Power return (GND)
9 SPI_CS1 SPI chip select signal (CS)
10 SPI_DIN1 SPI data input (MISO)
Switchable DUT power supply: +3.3 V, +5 V, Hi-Z (disconnected).
NOTE: When VDUT is Hi-Z, all digital I/O are also Hi-Z.
2.3 Theory of Operation for SM-USB-DIG Platform
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Figure 3 shows the block diagram for the SM-USB-DIG Platform. This platform is a general-purpose data
acquisition system that is used on several different Texas Instruments evaluation modules. The details of
its operation are included in the SM-USB-DIG Platform User's Guide (SBOU098). The block diagram
shown in Figure 3 is given as a brief overview of the platform.
Figure 3. SM-USB-DIG Platform Block Diagram
The primary component of the SM-USB-DIG Platform is the TUSB3210, an 8052 microcontroller with a
built-in USB interface. The microcontroller receives information from the host computer that is interpreted
into power, I2C, SPI, and other digital I/O methods. During the digital I/O transaction, the microcontroller
reads the response of any device connected to the I/O interface. The response from the device is sent
back to the PC, where it is interpreted by the host computer.
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Copyright © 2009–2012, Texas Instruments Incorporated
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3 EVM Hardware Overview
Using the PGA112EVM or PGA113EVM hardware requires connecting the SM-USB-DIG Platform and the
EVM together, applying power, connecting the USB cable, and providing the input signal. This section
presents the details of these procedures.
3.1 Electrostatic Discharge Warning
Many of the components on the PGA112EVM and PGA113EVM are susceptible to damage by
electrostatic discharge (ESD). Customers are advised to observe proper ESD handling precautions when
unpacking and handling the EVM, including the use of a grounded wrist strap at an approved ESD
workstation.
3.2 Connecting the Hardware
To connect the EVM board and the SM-USB-DIG Platform together, firmly slide the male and female ends
of the 10-pin connectors together, as shown in Figure 4. Make sure that the two connectors are
completely pushed together; loose connections may cause intermittent operation.
EVM Hardware Overview
Figure 4. Typical EVM Hardware Connections
3.3 Connecting the USB Cable to the SM-DIG-Platform
Figure 5 shows the typical response when connecting the SM-USB-DIG Platform board to a PC USB port
for the first time. Typically, the computer responds with a Found New Hardware, USB Device pop-up
dialog. The pop-up window then usually changes to Found New Hardware, USB Human Interface Device.
This pop-up indicates that the device is ready to be used. The SM-USB-DIG Platform uses the human
interface device drivers that are part of the Microsoft Windows™ operating system.
Figure 5. Confirmation of SM-USB-DIG Platform Driver Installation
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