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OPA2111 Datasheet, PDF (11/15 Pages) Burr-Brown (TI) – Dual Low Noise Precision Difet OPERATIONAL AMPLIFIER | |||
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IB = ±4pA max
1/2 OPA2111BM
3
Gain = 100
âIn
2
1
CMRR â 106dB
RIN â 1013â¦
RF
5kâ¦
2
25kâ¦
25kâ¦
5
RG
101â¦
RF
5kâ¦
25kâ¦
3
6
Output
1/2 OPA2111BM
6
25kâ¦
Burr-Brown
INA105
7
Differential
5
Amplifier
1
+In
Differential Voltage Gain = 1 + 2RF/RG
FIGURE 9. FET Input Instrumentation Amplifier.
10kâ¦
Input
â10pF
(1)
IN914
1/2
2
OPA2111AM
1
3
1Mâ¦
(1)
(1)
IN914
2N4117A
NOTE: (1) Reverse polarity for
negative peak detection.
1/2
6
OPA2111AM
7
5
Output
Droop â 0.5mV/s
0.01µF
Polystyrene
FIGURE 10. Low-Droop Positive Peak Detector.
6.3Mâ¦
944kâ¦
6.3Mâ¦
7.8Mâ¦
1.6Mâ¦
In
1.6Mâ¦
0.01µF
NPO
2
1
1/2 OPA2111
3
1.6Mâ¦
1.6Mâ¦
0.01µF
NPO
0.01µF
NPO
6
7
1/2 OPA2111
5
Out
0.01µF
NPO
NOTE: Lower value resistors will have lower
thermal noise but capacitors must
be scaled larger.
FIGURE 11. 10Hz Fourth-Order Butterworth Low-Pass Filter.
AV = 2.6
fO = 10Hz
â24dB/Octave
®
11
OPA2111
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