Q U I C K R E F E R E N C E G U I D E
Data Device Corporation
RD-19230EX-300 / RD-19240EX-300
User’s
Guide
8
Using DC Inputs
When using DC inputs the synthesized reference feature of the RD converter
must be disabled. This can be accomplished by installing an 8
Ω
resistor in
the R33 location that will connect the RD converter
DSR
pin to ground.
Power Requirements
The evaluation board is pre-configured for +5Vdc only operation. The card
can be reconfigured for use with 2 power supplies of +5Vdc and
–5Vdc.
Power Supply inputs are connected to the board via P1 (See Figure 2,
location 1). Additionally, TB2 must be set to the applicable power supply input
configuration (See Figure 2, location 14):
+5vdc only “charge pump mode” TB2 – J1, J2 jumpers installed
+5vdc and –5vdc supplies used TB2 – Remove J1, J2
Evaluation board optional digital input / output (P3) connector:
The evaluation board has provisions for an optional digital input / output
connector to be mounted on the board with all digital input / output signals
already routed to the connector pin-outs. (See Figure 2, location 9) The P3
connector footprint is a 30-pin dual row header with .100-inch centers. One
vendor source for available mounting connectors is Samtec Inc.,
www.samtec.com web site, reference p/n TSW-115-07-S-D.
Summary of Contents for RD-19230EX-300
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