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4-1
Power Supply
Power Supply
The EVM accepts four power supplies.
- A dual ± Vs dc supply for the dual-supply op-amps.
- A single 5.0 V dc supply for the analog section of the ADC.
- A single 3.3 V to 5 V dc supply for the digital section of the ADC.
There are two ways to provide these voltages.
- Hook-up the test points on the EVM. The test points are clearly labeled
+Vdd (3.3 V to 5 V), +5VA, +Vs (up to 18 V depending upon the amplifiers)
and –Vs (up to –18 V depending upon the amplifiers).
- Use the power connector P5/J5 and derive the voltages elsewhere.
The pinout for this connector is shown in Table 4−1.
Table 4−1.Power Connector Pinout Description
Signal P5/J5 Pin Number Signal
+VA 1 2 −VA
+5VA 3 4 −5VA
AGND 5 6 DGND
+1.8VD 7 8 VD1
+3.3VD 9 10 +5VD
Chapter 4