Instrumentation Amplifier

An instrumentation circuit is shown in Figure 5. The

high CMRR of the CLC436 benefits this application.

The resistors are kept equal to improve the overall

CMRR.

Figure 5: Instrumentation Amplifier

2nd Order Sallen-Key Band-Pass Filter

The CLC436 is well suited for Sallen-Key type active

filters.

Figure 6 illustrates the band pass topology

and design equations. For optimum high frequency

performance:

and 500pF

Figure 6: Sallen-Key Active Filter

500

Ω

500

Ω

+

-

500

Ω

CLC436

500

Ω

-

+

500

Ω

CLC436

50

Ω

-

+

CLC436

500

Ω

500

Ω

CLC436

+

-

C

1

5

C

G1

R

R

, desired mid band gain

R2

Q

GC 2 f

, where f

desired center frequency

R

GR

1 4.8Q

2G G

1

4.8Q

2G G

R

5GR

1 4.8Q

2G G

G 1

4Q

21

f

g

1

1

2

1

22

22

3

1

22

2

=

=+

−

=

()

=

=

+−

+

+









−+

=

+−

+

+ −









π

http://www.national.com

6

Lit #150436-004

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sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can

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