LM358

LOW POWER DUAL OPERATIONAL AMPLIFIERS

LM358

Document number: DS35167 Rev. 2 - 2

6 of 14

www.diodes.com

February 2011

© Diodes Incorporated

+

Bandpass Active Filter

+

-

R1

390K

V

IN

C1

0.01?F

+

V

O

+

-

C2

0.01?F

C3

10?F

R2

620K

R3

680

R4

390K

R5

39K

R6

120K

R7

100K

R8

100K

f

Q = 25

Bandpass Active Filter

+

-

R1

390K

V

IN

C1

0.01?F

+

V

O

+

-

C2

0.01?F

C3

10?F

R2

620K

R3

680

R4

390K

R5

39K

R6

120K

R7

100K

R8

100K

f

Q = 25

+

-

+

-

+

-

+V

1

+V

2

R1

2K

GAIN ADJUST

R2

100K

R3

100K

R4

100K

R5

100K

R6

100K

R7

100K

V

O

As Shown: V

O

= 101(V

2

-V

1

)

V

O

=( 1+

)(V

2

-V

1

)

2R

2

R

1

If R1 = R5 & R3 = R 4 = R6 = R7 (CMRR depends on match)

High Input Z Adjustable-Gain

DC Instrumentation Amplifier

+

-

+

-

+

-

+V

1

+V

2

R1

2K

GAIN ADJUST

R2

100K

R3

100K

R4

100K

R5

100K

R6

100K

R7

100K

V

O

As Shown: V

O

= 101(V

2

-V

1

)

V

O

=( 1+

)(V

2

-V

1

)

2R

2

R

1

If R1 = R5 & R3 = R 4 = R6 = R7 (CMRR depends on match)

High Input Z Adjustable-Gain

DC Instrumentation Amplifier

+

-

+

-

+V

IN

+V

O

I

IN

I

B

I

B

I

B

I

B

0.001?F

I

B

R

1.5M

2R

3M

AUX AMP

INPU T CURRENT

COMPENSATION

Using Symmetrical Amplifiers to Reduce

Input Current (General Concept)

2N929*

*hi ? AT 50 nA

+

-

+

-

+V

IN

+V

O

I

IN

I

B

I

B

I

B

I

B

0.001?F

I

B

R

1.5M

2R

3M

AUX AMP

INPU T CURRENT

COMPENSATION

Using Symmetrical Amplifiers to Reduce

Input Current (General Concept)

2N929*

*hi ? AT 50 nA