INA120 Datasheet, PDF (9/12 Pages) Texas Instruments – INSTRUMENTATION AMPLIFIER

Input Stage Offset Adjustment for High Gains (see text).
V+
V+
R₁
100kΩ
43 6 7
12
2
5
A₁
8
G = 10
V_IN
9
A₃
1
V_O
V+
10
A₂
11
14 15 16
13
FIGURE 4. Offset Adjustment Circuits.
17
V–
100µA
18
1/2 REF200
OPA27
10kΩ
±10mV
100Ω
100Ω
Output Offset Adjustment
for low gains (see text).
100µA
1/2 REF200
V–
Microphone,
Hydrophone
etc.
47kΩ
47kΩ
INA120
Thermocouple
10kΩ
INA120
V+
R_S
R_S
INA120
R_S used to limit input
current to 100mA.
Diodes:1N4148
V–
FIGURE 6. Input Protection Circuit.
INA120
Center-tap provides
bias current return.
FIGURE 5. Providing an Input Bias Current Path.
9
®
INA120