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
