AMC7832EVM Software Overview
17
SLAU544A – February 2014 – Revised September 2016
Copyright © 2014–2016, Texas Instruments Incorporated
AMC7832EVM User’s Guide
Figure 15. DAC Page
The 12 DAC channels are broken up into different DAC banks, where each channel within a bank shares
a common programmable voltage range, which is selectable through the Program Range column. The
default range upon startup is the 0-V to 10-V range, but it should be noted that this range is not fully
realizable because AV
CC
is connected to the +5-V LDO supply. For default operation, it is better to select
the 0-V to 5-V range. If the 0-V to 10-V range is desired, populate the correct shunt resistor for AV
CC
,
shown in
, to connect the AV
CC
supply to +12-V.
NOTE:
Special care must be taken when selecting the –10-V to 0-V range, as this requires an
external jumper modification and also requires that the user select the appropriate
Output
Reference
button. The
Output Reference 1
button sets the negative voltage range for DAC
Banks A and B, while the
Output Reference 2
button sets the negative range for DAC Banks
C and D. The DAC voltage range jumper settings are displayed in
. Ensure that the
AMC7832EVM board is powered off before selecting different jumper positions.
The DAC page also displays two input fields in the Program Values column (see
).
Figure 16. Program DAC Registers