Two Operational Amplifier Instrumentation Amplifier

3-9

Example Circuits
Figure 3–6.Two Operational Amplifier Instrumentation Amplifier Wwith Single SupplyUsing Area 200
C206 C207
C209 C210
V2+
V2–
V2+
GND2
V2–
Power Supply Bypass
+
–
14
1
4
3
2
V2+
V2–
R212
C215
R216 C211
R221
R220
R218
R219
R217
R215
C212
C213
A2OUT
1/2 Dual Op Amp
A201–
A202–
A203+
A204+
+
–
R206
C202
R207 C203
R204
R203
R201
R202
R209
C204
C201
B2OUT
1/2 Dual Op Amp
B201–
B202–
B204+
B203+
R211 C
RA
U202
R213
Voltage Reference
U201A
U201B
V2+
VREF2 = 1.24 V
R210
13
11
12
+
–
Vin
Jumper
Jumper
R205
TLV431ACDBV5
Jumper
0.1 µF 10 µF
JumperJumper
VOUT = Vin(1+ + )+ VREF2
2R212
R220 R212
R221
Jumper A201 – to B2OUT
R212 = R206
R221 = R203
R202 = R206 II R203
or Short if Using Low Input
Bias Op Amp
Jumper VREF2 to B202–
Jumper
A202– to B201–
R217 = R212 II R220
or Short if Using Low Input
Bias Op Amp
2.2 kΩ
9B2/SD
B2 FLT
R208
C205
6A2/SD
A2 FLT
R214
C214
C208
10 µF