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 U2 negative supply to ground Shorted Open
Connect U2 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 U4 negative supply to ground Shorted Open
Connect U4 negative supply to –VCC Open Shorted
(1)
SJP6 Connect DC offset voltage to U4 Shorted
(1)
N/A
SJP7 Connect -IN pin to analog ground Shorted
(1)
N/A
W1 Connect +5VD to BVDD Shorted
(1)
Open
Connect +3.3VD to BVDD Open Shorted
W2 Set signal straight binary/2s complement ( SB/2C) high Shorted N/A
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 N/A
(1)
Factory Installed
The ADS8380EVM 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 through ribbon cable to user system boards.
The digital input and output signals for the converter is available at connector P2 on the ADS8380EVM;
see Table 3 for the connector pinout.
4 SLAU146 – December 2004ADS8380EVM