D/A Converter - Rabbit RabbitCore RCM2200 User Manual

D.4 D/A Converter
The output will initially be 0 V to -10.05 V after the first inverting op-amp, and 0 V to
+10.05 V after the second inverting op-amp. All lows produce 0 V out, FF produces 10 V
out. The output can be scaled by changing the feedback resistors on the op-amps. For
example, changing 5.11 kΩ to 2.5 kΩ will produce an output from 0 V to -5 V. Op-amps
with a very low input offset voltage are recommended.
HC374
PA0–PA7
+5 V
47 kW
PE4 CLK
User's Manual
649 kW
324 kW
162 kW
80.6 kW
CT0–CT7
40.2 kW
+5 V
5.11 kW
47 kW
PE2
E
Figure D-5. Sample D/A Converter Connections
22 pF
5.11 kW
–
+
V+ > 12 V
1.19 kW
V– < –12 V
20 kW
10 kW
22 pF
10 kW
10 kW
–
V
o
+
4.99 kW
49