Texas Instruments ADS7861 EVM, User Manual, Page: 15 / 20

4-1 Power Supplies
Power Supplies
The ADS7861 EVM board requires 5 V dc for both the analog and digital
sections of the ADC. While filters are provided for all power supply inputs,
optimal performance of the EVM requires a clean, well-regulated power
source. Positive 5-V dc power is applied to J3 and J4 (pin1 referenced to pin 2).
The ADS8361 requires 5 V dc for the analog supply located on J3, and 2.7 V
to 5.5 V dc for the digital supply located on J4.
An alternate power source can be applied via J6 located on the bottom side
of the printed-circuit board. If a variable digital supply voltage is desired,
completely remove the shunt jumper from W3. Apply a 100-mA current limited
dc voltage of not more than 5.5 V to J4
.
Note:
The shunt jumper at location W3 should be placed across pin 2 and pin
3 for proper operation of the ADS7861. This is the factory default condi-
tion for both the ADS7861 and ADS8361 EVMs.
Topic Page
4.1 Reference Voltage 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4