Programming The Refdac Registers In The Adsxx53Evm - Texas Instruments ADS8353EVM-PDK User Manual

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.
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
selecting the 0 to V
The GUI displays the appropriate JP3 and JP4 jumper settings, as shown in
20
ADS8353EVM-PDK and ADS7853EVM-PDK
range mode or the 0 to 2 × V
ref
range. Uninstall jumpers JP3 and JP4 when selecting the 0 to 2 × V
ref
Figure 21. Selecting 0 to V
Copyright © 2014, Texas Instruments Incorporated
Figure 20
range mode. Install jumpers JP3 and JP4 when
ref
Range or 0 to 2 × V
ref ref
SBAU210A – June 2014 – Revised August 2014
www.ti.com
shows the internal reference Vref
range .
ref
Figure 21.
Range
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