Datasheet

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3 Digital Interface
Digital Interface
Table 2. Jumper Setting
Reference Pins/Pads
Description
Designator
1-2 2-3
SJP1 Buffer onboard reference (REF1004-2.5) Shorted
(1)
Open
Buffer user supplied reference voltage applied at P1 pin 20. Open Shorted
SJP2 Connect external reference directly to SJP4 Shorted
(1)
Open
Connect buffered external reference to SJP4 Open Shorted
SJP3 Connect U3 negative supply to ground Shorted Open
Connect U3 negative supply to –VCC Open Shorted
(1)
SJP4 Connect internal reference to REFIN Shorted
(1)
Open
Connect external reference to REFIN Open Shorted
SJP5 Connect common-mode voltage to VOCM pin of THS4131 Shorted
(1)
N/A
W1 Connect +5VD to BVDD Shorted
(1)
Open
Connect +3.3VD to BVDD Open Shorted
W3 Set power down signal (PD) high Shorted N/A
W4 Set frame sync signal (FS) high Shorted N/A
W5 Set chip select signal (CS) low Shorted
(1)
N/A
(1)
Factory Installed
The ADS8372EVM is designed for easy interfacing to multiple platforms. Samtec plug and socket
connectors provide a convenient dual row header/socket combination at P1 and P2 to plug into prototype
boards or ribbon cable over to user system boards.
The digital input and output signals for the converter is available at connector P2 on the ADS8372EVM,
see Table 3 for the connector pinout.
Table 3. Pinout for Serial Control Connector P2
Description Signal Name Connector Pin Signal Name Description
Chip Select CS P2.1 P2.2 N/A Reserved
Serial Clock SCLK P2.3 P2.4 DGND Ground
Reserved N/A P2.5 P2.6 N/A Reserved
Frame Sync FS P2.7 P2.8 N/A Reserved
Reserved N/A P2.9 P2.10 N/A Reserved
Reserved N/A P2.11 P2.12 N/A Reserved
Serial Data Out SDO P2.13 P2.14 N/A Reserved
BUSY BUSY P2.15 P2.16 N/A Reserved
Convert Start CONVST P2.17 P2.18 DGND Ground
Power down PD P2.19 P2.20 N/A Reserved
ADS8372EVM 4 SLAU160 – July 2005