Texas Instruments Modular Evaluation Module MSOP8 - Manual (Page 15)

4-1 Power Supplies
Power Supplies
The Modular MSOP8 EVM board requires 5 V dc for the analog section. This
includes the voltage reference (U2), the reference buffer (U4), and optionally,
the ADC installed on the EVM (via JMP1). Supply voltages of 1.8 V to 5 V dc
for the digital section are also required. When used in combination with one
of the DAP Interface boards, J3 provides connection to the common power bus
described in document SLAU104. Table 4 - 1 shows the pin out of J3.
Table 4 - 1. Power Supply Pin Out
Signal Pin Number Signal
Unused 1 2 Unused
+5VA 3 4 Unused
DGND 5 6 AGND
+1.8VD 7 8 +VD1
+3.3VD 9 10 +5VD
When power is supplied to J3, JMP3 allows for one of four different dc voltages
to be applied to the digital sections of the ADC. See the schematic and PWB
silkscreen for details.
Topic Page
4.1 ADC Power 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Stand Alone Operation 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Reference Voltage 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4