2.8kΩ
VO
LA
RG/2
INA114
Ref
RA
2.8kΩ
G = 10
390kΩ
1/2
OPA2604
1/2
OPA2604
10kΩ
RL
390kΩ
FIGURE 10. ECG Amplifier With Right-Leg Drive.
–
VO
+10V
VIN
+
RG
INA114
Ref
R1
1MΩ
C1
0.1µF
G = 500
Bridge
VO
RG
100Ω
INA114
Ref
1
f–3dB
=
2πR1C1
OPA602
= 1.59Hz
FIGURE 11. Bridge Transducer Amplifier.
FIGURE 12. AC-Coupled Instrumentation Amplifier.
VIN
R
–
R1
IO
=
• G
VIN
+
RG
INA114
Ref
IB
A1
IO
Load
A1
IB Error
OPA177
OPA602
OPA128
±1.5nA
1pA
75fA
FIGURE 13. Differential Voltage-to-Current Converter.
®
12
INA114