The EVM accepts four power supplies.
- A dual ±Vs DC supply for the dual-supply op amps.
A ±12-V DC supply is recommended.
- A single +5.0-V DC supply for the analog section
of the board (ADC + reference).
- A single +5.0-V or +3.3-V DC supply for the
digital section of the board (ADC + address decoder + buffers).
There are two ways to provide these voltages.
- Wire in voltages, as listed in
Table 1-8, at test points on the EVM.
Table 1-8 Power-Supply Test
Points
| Test Point |
Signal |
Description |
| TP11 |
+BVDD |
Apply a +3.3-V DC or +5.0-V DC voltage. See the respective ADC
data sheet for the full range. |
| TP10 |
+AVCC |
Apply a +5.0-V DC voltage. |
| TP12 |
+VA |
Apply a +12.0-V DC voltage. Positive supply for the
amplifier. |
| TP14 |
–VA |
Apply a –12.0-V DC voltage. Negative supply for the
amplifier. |
- Use the power connector J1 and
derive the voltages elsewhere. Table 1-9 lists the pin out connections for J1. Set jumper W5 to short between pins 1-2
or pins 2-3 to short +3.3VD or +5VD, respectively, to be the buffer digital
supply (+BVDD).
Table 1-9 Power Connector, J1, Pin
Out
| Signal |
Power Connector -
J1 |
Signal |
| +VA (+12VA) |
1 |
2 |
–VA (–12VA) |
| +AVCC (+5VA) |
3 |
4 |
N/C |
| N/C |
5 |
6 |
AGND |
| N/C |
7 |
8 |
N/C |
| +3.3VD |
9 |
10 |
+5VD |