ADSxx53EVM-PDK Kit Operation
3. The ADSxx53 device incorporates two internal programmable 2.5-V reference sources. When selecting
the dual, internal programmable reference, independently change the voltages at VREF_A and
VREF_B by writing to user-programmable registers REFDAC_A and REFDAC_B. The
Vref Value-ADC
A
and
Vref Value-ADC B
control panels contain the REFDAC_x register settings. The reference
voltage can be programmed in the range of 2.5 V to 2.0 V by entering the REFDAC_x register value in
the control panel and clicking the
Write REFDAC_x
button.
shows the internal reference
Vref
Value-ADC x
control panels on the
ADSxx53EVM Settings
page of the GUI.
Figure 20. Programming the REFDAC Registers in the ADSxx53EVM
4. Scroll down in the
ADSxx53EVM Settings
page and find the
Input Range Selection [CFR, Bit[9]]
button
to select the 0 to V
ref
range mode or the 0 to 2 × V
ref
range mode. Install jumpers JP3 and JP4 when
selecting the 0 to V
ref
range. Uninstall jumpers JP3 and JP4 when selecting the 0 to 2 × V
ref
range .
The GUI displays the appropriate JP3 and JP4 jumper settings, as shown in
.
Figure 21. Selecting 0 to V
ref
Range or 0 to 2 × V
ref
Range
20
ADS8353EVM-PDK and ADS7853EVM-PDK
SBAU210A – June 2014 – Revised August 2014
Copyright © 2014, Texas Instruments Incorporated