V

O

V = 1 V

I

RMS

Device

150 kΩ

19.5 kΩ

220 pF

1.8 kΩ

3.3 nF

47 pF

V

(V+)

V

(V–)

C1

1 nF

C2

150 pF

R3

549 Ω

R1

549 Ω

R2

1.24 kΩ

V

(V+)

V

O

V

I

V

(V–)

Device

18

OPA2356-EP

SBOS955 – FEBRUARY 2019

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Copyright © 2019, Texas Instruments Incorporated

MFB and Sallen-Key, low-pass and high-pass filter synthesis is quickly accomplished using TI’s FilterPro™

program. This software is available as a free download at www.ti.com.

Figure 35. Second-Order Butterworth 500-kHz Low-Pass Filter

Figure 36. OPA2356-EP Configured as a Three-Pole, 20-kHz, Sallen-Key Filter