Texas Instruments AMC7812EVM-PDK, User Manual

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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
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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
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
4 AMC7812EVM-PDK User’s Guide SBAU177D – September 2010 – Revised August 2014
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