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AMC7812EVM-PDK
User Manual
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Texas Instruments AMC7812EVM-PDK User Manual

User's Guide
SBAU177D–September 2010–Revised August 2014

AMC7812EVM-PDK User’s Guide

This user's guide describes the characteristics, operation, and use of the AMC7812 evaluation module (EVM). This user’s guide also discusses the proper setup and configuration of software and hardware and reviews various aspects of program operation. A complete circuit description, schematic diagram, and bill of materials are also included.
Contents
2 AMC7812EVM Hardware Setup........................................................................................... 4
3 AMC7812EVM Software Setup ............................................................................................ 7
4 AMC7812EVM Hardware Overview....................................................................................... 9
5 AMC7812EVM Software Overview ...................................................................................... 13
6 AMC7812EVM Documentation........................................................................................... 22
List of Figures
1 AMC7812EVM Hardware Setup........................................................................................... 4
2 AMC7812 Test Board Block Diagram..................................................................................... 4
5 AMC7812EVM Install Path ................................................................................................. 8
6 Typical Hardware Connections on the AMC7812EVM................................................................ 10
7 Confirmation of SDM-USB-DIG Platform Driver Installation.......................................................... 10
8 AMC7812EVM GUI Location ............................................................................................. 13
9 AMC7812EVM GUI – Power On ......................................................................................... 13
10 Software Reset Button..................................................................................................... 14
11 Low-Level Configuration Page............................................................................................ 14
12 ADC Page................................................................................................................... 15
13 ADC Block Activation Sequence ......................................................................................... 15
14 ADC Channel MUX ........................................................................................................ 15
15 ADC CH0 to CH3 Config.................................................................................................. 15
16 ADC External Ref Value................................................................................................... 16
17 ADC Report Window....................................................................................................... 17
18 DAC Page................................................................................................................... 17
19 Program DAC Registers................................................................................................... 17
20 DAC Gain Button........................................................................................................... 18
21 DAC External Ref Value................................................................................................... 18
22 DAC Clear and Latch Settings............................................................................................ 18
23 DAC Clear Triggers ........................................................................................................ 18
24 ALARMS Page.............................................................................................................. 19
25 Alarm LEDs ................................................................................................................. 19
26 Alarm LEDs Activated ..................................................................................................... 19
27 Alarm Control Registers................................................................................................... 20
28 GPIO + Temp Page........................................................................................................ 20
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29 Temperature Read......................................................................................................... 20
30 Threshold Limit Configuration ............................................................................................ 21
31 Temperature Conversion Rate ........................................................................................... 21
32 GPIO Page.................................................................................................................. 21
33 GPIO Write/Read........................................................................................................... 21
34 AMC7812EVM Schematic (1 of 3)....................................................................................... 22
35 AMC7812EVM Schematic (2 of 3)....................................................................................... 23
36 AMC7812EVM Schematic (3 of 3)....................................................................................... 24
37 AMC7812EVM PCB Components Layout............................................................................... 25
List of Tables
1 Contents of AMC7812EVM Kit............................................................................................. 3
4 Default Jumper Settings .................................................................................................... 9
5 AMC7812EVM Jumper and Shunt Resistor Settings.................................................................. 11
6 AMC7812EVM ADC Signal Connections ............................................................................... 11
7 AMC7812EVM DAC Signal Connections ............................................................................... 12
8 AMC7812EVM GPIO Signal Definition.................................................................................. 12
9 Conversion Rates .......................................................................................................... 16
10 Bill of Materials ............................................................................................................. 26
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AMC7812EVM-PDK User’s Guide SBAU177D–September 2010–Revised August 2014
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1 Overview

This EVM features the AMC7812, a highly-integrated, low-power, complete analog monitoring and control solution that includes a 16-channel (12-bit) ADC, 12-channel (12-bit) DAC, eight GPIOs, and two remote/one local temperature sensor channels. The device also features input out-of-range alarms, and configurable I2C-compatible/SPI interface with 5-V/3-V logic.

1.1 AMC7812EVM Kit Contents

Table 1 details the contents of the EVM kit. Contact the Texas Instruments Product Information Center
nearest you if any component is missing. TI highly recommends to check the TI website (www.ti.com) to verify that you have the latest versions of the related software.
Table 1. Contents of AMC7812EVM Kit
AMC7812EVM PCB evaluation board 1
SDM-USB-DIG platform PCB 1
USB extender cable 1
+24-V wall supply 1

1.2 Related Documentation from TI

The following document provides information regarding TI integrated circuits used in the assembly of the AMC7812EVM. This user's guide is available from the TI website, literature number SBAU177. Newer revisions may be available from the TI website at www.ti.com, or call the TI 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.
Overview
ITEM QUANTITY
Table 2. Related Documentation
Document Literature Number
AMC7812 Product Data Sheet SBAS513
SDM-USB-DIG Platform User’s Guide SBOU136
Microsoft, Windows are registered trademarks of Microsoft Corporation. All other trademarks are the property of their respective owners.
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Default:
LDO Regulated
Power
20-Pin
Conn. To
SDM-
USB-DIG
16-CH ADC
Input
8 GPIO
Connection
12-CH DAC
Vout
Optional:
External Power
(Terminal Blocks)
AMC7812
SPI
Power
AMC7812EVM
USB Bus
from
Computer
+24-V Wall Adapter
or
Optional External Power
20-Pin
Connector
SDM-USB-
DIG
J1 connection or
terminal blocks
Personal
Computer
(PC)
AMC7812EVM Hardware Setup

2 AMC7812EVM Hardware Setup

This section provides the overall system setup for the EVM. A PC runs software that communicates with the SDM-USB-DIG platform, which generates the power and digital signals used to communicate with the EVM board. The EVM includes a +24-V wall supply that provides power to on-board power regulators (LDOs) that regulate the analog and digital supplies. Connectors are also included on the EVM board for optional, external power supplies. Figure 1 displays the system setup for the AMC7812EVM.
Figure 1. AMC7812EVM Hardware Setup
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2.1 Theory of Operation for AMC7812 Hardware

Figure 2 shows a block diagram of the AMC7812EVM test board. The EVM board provides testpoints for
the supplies, internal reference, ground connections, SPI inputs, ADC inputs, and DAC outputs.
Figure 2. AMC7812 Test Board Block Diagram
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2.2 Signal Definitions of J1 (20-Pin Male Connector Socket)

The AMC7812EVM includes a 20-pin connector socket used to communicate between the EVM and the SDM-USB-DIG platform. The pin out of the J1 connector is shown in Table 3.
Table 3. J1 Signal Definition
Pin on J1 Signal Description
1 SCL I2C clock signal (SCL) 2 DIG_GPIO2 GPIO – Control output or measure input 3 DIG_GPIO0 GPIO – Control output or measure input 4 DIG_GPIO3 GPIO – Control output or measure input 5 SDA I2C data signal (SDA) 6 DIG_GPIO4 GPIO – Control output or measure input 7 DIG_GPIO1 GPIO – Control output or measure input 8 DIG_GPIO5 GPIO – Control output or measure input 9 MOSI SPI data output (MOSI) 10 DIG_GPIO6 GPIO – Control output or measure input
11 VDUT 12 DIG_GPIO7 GPIO – Control output or measure input
13 SCLK SPI clock signal (SCLK) 14 DIG_GPIO8 GPIO – Control output or measure input 15 GND Power return (GND) 16 DIG_GPIO9 GPIO – Control output or measure input 17 CS SPI chip select signal (/CS) 18 DIG_GPIO10 GPIO – Control output or measure input 19 MISO SPI data input (MISO) 20 DIG_GPIO11 GPIO – Control output or measure input
Switchable DUT power supply: +3.3 V, +5 V, Hi-Z (disconnected). Note: When VDUT is Hi-Z all digital I/O are Hi-Z as well.
AMC7812EVM Hardware Setup
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MSP430F5528
Microcontroller
USB Bus
from
Computer
3.3-V
Regulator
+3.3 V
USB
+5.0 V
Level
Translators
Power
Switching
Vdut
(Hi-Z, 3.3 V or 5 V)
Switched Power
I2C SPI
GPIO
Power on
Reset
SDM-USB-DIG
To Test Board
To Computer and Power Supplies
+3.3 V
USB +5.0 V
AMC7812EVM Hardware Setup

2.3 Theory of Operation for SDM-USB-DIG Platform

The SDM-USB-DIG platform is a general-purpose data acquisition system that is used on select TI EVMs. The core component of the platform is the MSP430F5528, an ultra-low power 16-bit MCU. The
microcontroller receives information from the host PC and translates it into I2C, SPI, or other digital I/O patterns. The connected device (in this case, the AMC7812 device) connects to the I/O interface of the platform. During digital I/O transactions, the platform obtains information from the AMC7812 device and sends it to the host PC for interpretation. Figure 3 shows a block diagram of the platform.
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Figure 3. SDM-USB-DIG Platform Block Diagram
AMC7812EVM-PDK User’s Guide SBAU177D–September 2010–Revised August 2014
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3 AMC7812EVM Software Setup

This section provides the procedure for EVM software installation.

3.1 Operating Systems for AMC7812EVM Software

The EVM software was tested on the Microsoft®Windows®XP and Windows 7 operating systems with the United States and European regional settings. The software should also be compatible with other Windows operating systems.

3.2 AMC7812EVM Software Installation

The software is available through the EVM product folder (AMC7812EVM) on the TI website. After the software is downloaded on the PC, navigate to the AMC7812EVM_Installer folder, and run the setup.exe file as shown in Figure 4. When the software is launched, an installation dialog opens and prompts the user to select an installation directory. If left unchanged, the software location defaults to C:\Program Files (x86)\AMC7812EVM (Windows 7), as shown in Figure 5. The software installation automatically copies the required drivers for the SDM-USB-DIG and AMC7812EVM to the PC. After the software is installed, connecting the SDM-USB-DIG to a USB port may launch a driver installation dialog. Choose the Install this driver software anyway option to continue with installation. (Note: On XP machines, choose to have the system automatically find the driver or software.)
AMC7812EVM Software Setup
Figure 4. AMC7812EVM Installer Directory
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AMC7812EVM Software Setup
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Figure 5. AMC7812EVM Install Path
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AMC7812EVM-PDK User’s Guide SBAU177D–September 2010–Revised August 2014
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4 AMC7812EVM Hardware Overview

The subsequent sections provide detailed information on the EVM hardware and jumper configuration settings. To use the +24-V wall supply, set the AVDDand IOVDDjumper connections to the default configuration listed in Table 4. The table also displays the default configurations of all jumper connections on the AMC7812EVM. Connect the USB extender cable from the SDM-USB-DIG to the PC, and the +24­V wall adapter to the J5 terminal.
Table 4. Default Jumper Settings
Jumper Default Position Function
JP1 Shunt on 1-2
JP2 Shunt on 1-2
JP3 Shunt on 1-2
JP4 Shunt on 1-2
JP5 Shunt on 1-2
JP6 Not installed
J7 Default OPA to GND for protection
Shunt on 5-6 Shunt on 7-8
AMC7812EVM Hardware Overview
Selecting bus
• 1~2: (Default) SPI
• 2~3: (I2C)
Selecting DAC reference
• 1~2: (REF-OUT to REF-DAC)
• 3~4: (DACREF to REF-DAC)
• 5~6: (2.5 V REF to REF-DAC)
Selecting AVDD/DVDDvoltage
• 1~2: Onboard 5-V supply
• 2~3: External supply
Selecting AVCCvoltage
• 1~2: (On board 14-V supply)
• 2~3: (External supply)
Selecting IOVDDvoltage
• 1~2: (On board VDUT)
• 2~3: (External supply)
• Installed: Onboard temp sensors
• Not installed: External temperature sensors

4.1 Electrostatic Discharge (ESD) Caution

Many of the components on the AMC7812EVM are susceptible to damage by ESD. Observe proper ESD handling precautions when unpacking and handling the EVM, including the use of a grounded wrist strap at an approved ESD workstation.

4.2 Connecting the Hardware

To connect the SDM-USB-DIG to the EVM board, align and firmly connect the female and male ends of the 20-pin connectors (see Figure 6). Verify the connection is snug, as loose connections may cause intermittent operation.
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AMC7812EVM Hardware Overview
Figure 6. Typical Hardware Connections on the AMC7812EVM
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4.3 Connecting the USB Cable to the SDM-USB-DIG

Figure 7 shows the typical response when connecting the SDM-USB-DIG platform to a USB port of a PC
for the first time. The PC usually responds with a Found New Hardware, USB Device popup dialog window. The popup window then changes to Found New Hardware, Virtual COM Port (CDC). This popup indicates that the device is ready for use. The CDC driver is used for communication between the SDM­USB-DIG and PC.
Figure 7. Confirmation of SDM-USB-DIG Platform Driver Installation
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AMC7812EVM-PDK User’s Guide SBAU177D–September 2010–Revised August 2014
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