Quad Operational Amplifier Instrumentation Amplifier
3-11
Example Circuits
Figure 3–7.Quad Operational Amplifier Instrumentation Amplifier With Dual Supply Using Area 300+
–
4
1
13
3
2
V3+
V3–
R302
C301
R304 C302
R301
R303
R305
R306
R308
R307
C304
C303
A3 OUT
A301–
A302–
A303+
A304+
U301A
C305
R309 A3 FLT
AB3/SD
8
+
–7
5
6
R318
C308
R314 C310
R310
R312
R317
R313
R315
R311
C307
C309
B3 OUT
B301–
B302–
B303+
B304+
U301B
C306
R316
B3 FLT
+
–10
12
11
R325
C316
R323 C317
R322
R324
R326
R327
R329
R328
C318
C319
C3 OUT
C301–
C302–
C303+
C304+
U301C
C320
R330
CD3/SD
9
+
–16
14
15
R339
C321
R331 C324
R332
R333
R334
R335
R336
R337
C322
C325
D3 OUT
D301–
D302–
D303+
D304+ U301D
C323
R338
C3 FLT
D3 FLT
C313 C314
C311 C312
V3+
V3–
GND3
Power Supply Bypass
2.5 = V3+
2.5 = V3–
10 µF
10 µF
0.1 µF
0.1 µF
R320
U302
R319
Voltage Reference
V3+ VREF3
R321
C315
10 kΩ
10 kΩ
10 kΩ
10 kΩ
5 kΩ
5 kΩ
100 Ω
Jumpers
Jumpers
Jumpers
Jumper
Jumper
+
–
VINA
+
–
VINB
+
–
Vadj