OPA111 Datasheet, PDF (12/14 Pages) Burr-Brown (TI) – Low Noise Precision Difet OPERATIONAL AMPLIFIER

3
–In
6
OPA111
2
R_F
5kΩ
R_G 101Ω
R_F
5kΩ
2
6
OPA111
3
+In
I_B = 1pA
Gain = 100
CMRR ≈ 106dB
R_IN = 10¹³â„¦
2 ^25kΩ
25kΩ
5
3 ^25kΩ
6
Output
25kΩ
Burr-Brown
INA105
Differential Amplifier
1
Differential Voltage Gain = 1 + 2R_F/R_G
FIGURE 17. FET Input Instrumentation Amplifier.
Input
≈10pF
IN914*
2
6
3 ^3507J
8
30pF
10kΩ
1MΩ
2N4117*
IN914*
*Reverse polarity for
negative peak detection.
2
8
6
3 ^OPA111
Output
0.01µF
Polystyrene
Droop ≈ 100µV/s
FIGURE 18. Low-Droop Positive Peak Detector.
®
OPA111
12