5
Power Supplies
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Power Supplies
Table 6. TSW1100 Connector (continued)
Description
Signal Name
Connector.Pin#
Signal Name
Description
Ground
Ground
J7.27
J7.28
D11
Data Bit 11
Ground
Ground
J7.29
J7.30
D12
Data Bit 12
Ground
Ground
J7.31
J7.32
D13
Data Bit 13
Ground
Ground
J7.33
J7.34
D14
Data Bit 14
Ground
Ground
J7.35
J7.36
D15
Data Bit 15
Ground
Ground
J7.37
J7.38
N/C
Not Connected
Ground
Ground
J7.39
J7.40
INTc
Trigger Clock
This evaluation module provides direct access to all the analog-to-digital converter input control and output
signals via connector J6, see
Table 7. Pin out for Converter Control Connector, J6
Description
Signal Name
Connector.Pin#
Signal Name
Description
Chip Select Signal
CS
J6.1
J6.2
GND
Ground
Read Signal
RD
J6.3
J6.4
GND
Ground
Convert Start Signal
CONVST
J6.5
J6.6
GND
Ground
Byte Signal
BYTE
J6.7
J6.8
GND
Ground
RESERVED
RESERVED
J6.9
J6.10
GND
Ground
Busy Signal
BUSY
J6.11
J6.12
GND
Ground
The EVM accepts four power supplies.
•
A dual
±
VA DC supply for the dual supply op-amps. Recommend
±
6VDC supply.
•
A 5.0 V DC supply for analog section of the board (A/D + Reference).
•
A 5.0V or +3.3V DC supply for digital section of the board (A/D + address d buffers).
There are two ways to provide these voltages.
1. Wire in the voltages at test points on the EVM. See
Table 8. Power Supply Test Points
Test Point
Signal
Description
TP6
+BVDD
Apply +3.3VDC or +5.0VDC. See ADC datasheet for full range.
TP3
+AVCC
Apply +5.0VDC.
TP4
+VA
Apply +6.0VDC. Positive supply for amplifier.
TP5
–VA
Apply -6.0VDC. Negative supply for amplifier.
2. Use the power connector J5, and derive the voltages elsewhere. The pinout for this connector is
shown in
. If using this connector, then set W1 jumper to c3.3VD or +5VD from
connector to +BVDD. Short between pins 1-2 to 5VD, or short between pins 2-3 to select
+3.3VD as the source for the digital buffer voltage supply (+BVDD).
Table 9. Power Connector, J5, Pin Out
Signal
Power Connector – J5
Signal
+VA(+6V)
1
2
–VA (-6V)
+5VA
3
4
N/C
DGND
5
6
AGND
N/C
7
8
N/C
+3.3VD
9
10
+5VD
SLAU203 – February 2007
ADS8472EVM
7
