OPA4364-Q1 Datasheet, PDF (15/21 Pages) Texas Instruments – 1.8-V, 7-MHz, 90-dB CMRR, SINGLE-SUPPLY, RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER

OPA2364-Q1, OPA4364-Q1
www.ti.com
SGLS363A – JUNE 2006 – REVISED OCTOBER 2006
Active Filtering
APPLICATION INFORMATION (continued)
Low harmonic distortion and noise specifications plus high gain and slew rate make the OPAx364 optimal
candidates for active filtering. Figure 29 shows the implementation of a Sallen-Key, 3-pole, low-pass Bessel
filter.
220 pF
1.8 kΩ
19.5 kΩ 150 kΩ
V_IN = 1 V_rms
+
3.3 nF
47 pF ^OPAx364
–
V_OUT
Figure 29. OPAx364 Configured as 3-Pole, 20-kHz, Sallen-Key Filter
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