Datasheet

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SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004
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14
NOTE: FilterPro is a low-pass filter design program available for download at no cost from TI’s web site (www.ti.com). The program can be used
to determine component values for other cutoff frequencies or filter types.
DC Gain = 1
C
1
1nF
C
2
330pF
R
2
15.9k
Ω
R
1
1.93k
Ω
2.2nF
C
3
C
4
100pF
R
4
22.3k
Ω
R
3
2.07k
Ω
Cutoff Frequency = 50kHz
V
OUT
1/2
OPA2725
1/2
OPA2725
Figure 7. Four-Pole Butterworth Sallen-Key Low-Pass Filter