Rabbit RabbitCore RCM2200 User Manual - page 53
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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 k
Ω
to 2.5 k
Ω
will produce an output from 0 V to -5 V. Op-amps
with a very low input offset voltage are recommended.
Figure D-5. Sample D/A Converter Connections
+
–
+
–
649 kW
324 kW
162 kW
80.6 kW
40.2 kW
20 kW
10 kW
5.11 kW
CT0CT7
PA0PA7
HC374
47 kW
47 kW
CLK
E
+5 V
+5 V
PE2
PE4
1.19 kW
4.99 kW
10 kW
10 kW
5.11 kW
22 pF
22 pF
V
o
V+ > 12 V
V < 12 V