Power Supplies; Pinout For Serial Control Connector P2; Power Supply Test Points - Texas Instruments ADS8380EVM User Manual

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Description
Chip Select
Serial Clock
Reserved
Frame Sync
Reserved
Reserved
Serial Data Out
BUSY
Convert Start
Power down
4

Power Supplies

The EVM accepts four power supplies:
• A dual ±Vs dc supply for the dual-supply operational amplifiers. The maximum recommended voltage
is ±12 Vdc.
• A single +5-Vdc supply for the analog section of the board (A/D + Reference).
• A single +5-Vdc or +3.3-Vdc supply for the digital section of the board (A/D + buffers).
There are two ways to provide these voltages. The first way is to connect the voltages to the test points
listed in Table 4.
Test Point Signal
TP1 +VA
TP2 –VA
TP3 +BVDD
TP4 +AVCC
The second way is to use the power connector J2 and derive the voltages elsewhere.
pinout for J2. If using this connector, set W1 jumper to connect +3.3VD or +5VD from J2 to +BVDD. Shunt
pins 1-2 to select +5VD, or pins 2-3 to select +3.3VD as the source for the digital buffer voltage supply
(+BVDD).
SLAU146 – December 2004
Table 3. Pinout for Serial Control Connector P2
Signal Name Connector Pin
CS P2.1 P2.2
SCLK P2.3 P2.4
N/A P2.5 P2.6
FS P2.7 P2.8
N/A P2.9 P2.10
N/A P2.11 P2.12
SDO P2.13 P2.14
BUSY P2.15 P2.16
CONVST P2.17 P2.18
PD P2.19 P2.20
Table 4. Power Supply Test Points
Description
Connect +12-Vdc supply for amplifier
Connect –12-Vdc supply for amplifier
Apply +3.3 Vdc or +5 Vdc. See ADC data sheet for full range.
Apply +5 Vdc
Table 5. Power Connector J2 Pinout
Signal
+VA(+12V)
+5VA
DGND
N/C
+3.3VD
Signal Name Description
SB/2C Straight binary or 2s complement output
DGND Ground
N/A Reserved
N/A Reserved
N/A Reserved
N/A Reserved
N/A Reserved
N/A Reserved
DGND Ground
N/A Reserved
J2 Pin Signal
1 2 –VA(–12 V)
3 4 N/C
5 6 AGND
7 8 N/C
9 10 +5VD
Power Supplies
Table 5 gives the
ADS8380EVM 5