OPA604

10

SBOS019A

www.ti.com

FIGURE 5. Three-Pole Generalized Immittance Converter (GIC) Low-Pass Filter.

FIGURE 4. Three-Pole Low-Pass Filter.

R

5

2k

Ω

V

O

C

3

1000pF

Low-pass

3-pole Butterworth

f

R

1

6.04k

Ω

V

IN

R

2

4.02k

Ω

R

2

4.02k

Ω

C

2

1000pF

C

1

1000pF

R

4

5.36k

Ω

See Application Bulletin AB-026

for information on GIC filters.

1

2

OPA2604

1

2

OPA2604

OPA604

FIGURE 6. Differential Amplifier with Low-Pass Filter.

R

4

22k

Ω

R

3

10k

Ω

V

O

C

2

2000pF

R

2

22k

Ω

C

1

3000pF

R

1

2.7k

Ω

V

IN

f

C

3

100pF

OPA604

V

O

G = 1

100pF

–

V

IN

+

7.87k

Ω

7.87k

Ω

10k

Ω

10k

Ω

10k

Ω

10k

Ω

100kHz Input Filter

OPA604

1

2

OPA2604

1

2

OPA2604