lm2902wyd STMicroelectronics, lm2902wyd Datasheet - Page 10

• Manufacturer Part Number: lm2902wyd
• Description: Low Power Quad Operational Amplifier
• Manufacturer: STMicroelectronics

Typical single-supply applications
10/17
Figure 24. High input Z, DC differential
Figure 26. Using symmetrical amplifiers to
+V1
+V2
eo = [ 1 +
As shown eo = (e2 - e1)
1.5MΩ
e
100k Ω
I
I
I
R1
B
B
R4
R3
I
I
amplifier
] (e2 - e1)
reduce input current (general
concept)
2N 929
I
LM2902
B
100k Ω
1/4
LM2902
R2
3MΩ
1/4
I
0.001 μ F
I
B
B
LM2902
100k Ω
1/4
R3
Aux. amplifier for input
current compensation
e
o
LM2902
100k Ω
1/4
R4
V
o
Figure 25. Low drift peak detector
* Polycarbonate or polyethylene
e
I
Z
I
LM2902
1/4
I
B
1 μ F
1MΩ
R
2I
B
*
C
2N 929
2I
I
B
B
LM2902
3MΩ
1/4
3R
I
I
B
0.001 μ F
B
LM2902
Z
1/4
o
Input current
compensation
LM2902W
e
o