LM2902DT(2007) Просмотр технического описания (PDF) - STMicroelectronics

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Компоненты Описание

производитель

LM2902DT
(Rev.:2007)

Low power quad operational amplifier

STMicroelectronics 

LM2902

Typical single-supply applications

Figure 25. High input Z, DC differential

amplifier

Figure 26. Low drift peak detector

R1

100kΩ

R2

100kΩ

+V1

+V2

1/4

LM2902

eo = [ 1 +

R4

R3

]

(e2

-

e1)

As shown eo = (e2 - e1)

R3

100kΩ

R4

100kΩ

1/4

LM2902

IB

1/4

1/4

I B LM2902

eo

LM2902

eI

C

1μF *

2I B

Zo

ZI

2N 929 0.001μF

Vo

2IB

IB

R

1MΩ

3R

3MΩ

IB

1/4

LM2902

Input current

compensation

* Polycarbonate or polyethylene

Figure 27. Using symmetrical amplifiers to

reduce input current (general

concept)

1/4

II

I B LM2902

eo

eI

IB

2N 929

IB

1.5MΩ

0.001μ F

IB

3MΩ

IB

1/4

LM2902

Aux. amplifier for input

current compensation

11/16

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