Texas Instruments AMC7834, Руководство пользователя, Страница: 4 / 32

Default:
External Power
(Terminal Blocks)
20-Pin
Conn. To
SDM-
USB-DIG
4-CH Ext ADC
Input (0
í
2.5-V Range)
4-GPIO
Connection
8 12-Bit
DACs
(4 Bipolar/ 4 Unipolar)
Optional:
LDO-Regulated
Power
AMC7834
SPI
Power
4 High-Side Current
Sense Channels
2 Remote Temp
Diode Drivers
AMC7834EVM
USB Bus
From
Computer
External Power
or
Optional 24-V Wall Adapter
20-Pin
Connector
SDM-USB-DIG
J7 Connection or
Terminal Blocks
Personal
Computer
(PC)
AMC7834EVM Hardware Setup
www.ti.com
4 SLAU608B – December 2014 – Revised May 2016
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AMC7834 Evaluation Module
2 AMC7834EVM Hardware Setup
This section provides the overall system setup for the EVM. A personal computer (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. An op24-V wall supply can provide power through the J7
connector to provide power to on-board power regulators (LDOs) that regulate the analog and digital
supplies. By default, on-board connectors are included on the EVM board for external supplies.
Figure 1
displays the system setup for the AMC7834EVM.
Figure 1. AMC7834EVM Hardware Setup
2.1 Theory of Operation for AMC7834 Hardware
A block diagram of the AMC7834EVM test board is displayed in Figure 2 . The EVM board provides test
points and connections for the supplies, internal reference, ground connections, SPI inputs, ADC inputs,
current sense inputs, external temp sensing diodes, and analog outputs of the DAC.
Figure 2. AMC7834 Test Board Block Diagram