LM324 datasheet(8/14 Pages) STMICROELECTRONICS

Part #	LM324

Description	LOW POWER QUAD OPERATIONAL AMPLIFIERS

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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R1

10k

Ω

R2

1M

Ω

1/4

LM124

10k

Ω

eI

eO

+5V

(mV)

0

AV =1 +

R2

R1

(As shown

= 101)

AV

NON-INVERTING DC GAIN

1/4

LM124

eO

e 4

e

3

e 2

e

1

100k

Ω

100k

Ω

100k

Ω

100k

Ω

100k

Ω

100k

Ω

eo =e1 +e2 -e3 -e4

where (e1 +e2)

≥ (e3 +e4)

to keep eo

≥ 0V

DC SUMMING AMPLIFIER

TYPICAL SINGLE - SUPPLY APPLICATIONS

1/4

LM124

R3

100k

Ω

e

O

1/4

LM124

R1

100k

Ω

e

1

1/4

LM124

R7

100k

Ω

R6

100k

Ω

R5

100k

Ω

e

2

R2

2k

Ω

Gain adjust

R4

100k

Ω

if R1 =R5 and R3 =R4 =R6 =R7

eo

= [1+

2R1

R2

]

(e2 − e1)

As shown eo = 101 (e2 -e1).

HIGH INPUT Z ADJUSTABLE GAIN DC

INSTRUMENTATION AMPLIFIER

1/4

LM124

1/4

LM124

I B

2N 929

0.001

µF

I B

3R

3M

Ω

I B

Input current

compensation

e o

I B

e

I

1/4

LM124

Zo

Z

I

C

1

µF

2I

B

R

1M

Ω

2I

B

* Polycarbonate or polyethylene

*

LOW DRIFT PEAK DETECTOR

LM124 - LM224 - LM324

8/14

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