Texas Instruments PGA112 Evaluation Module Rev B PGA112EVM-B PGA112EVM-B Datenbogen
Produktcode
PGA112EVM-B
EVM Hardware Setup
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.
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.
shows the
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
. 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
the SM-USB-DIG Platform board or an external power supply; see
). 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.
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
3
SBOU073A – February 2009 – Revised May 2012
PGA112EVM and PGA113EVM User’s Guide
Copyright © 2009–2012, Texas Instruments Incorporated