LMH6624_16 Datasheet, PDF (21/38 Pages) Texas Instruments – LMH6624 and LMH6626 Single/Dual Ultra Low Noise Wideband Operational Amplifier

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LMH6624, LMH6626
SNOSA42G – NOVEMBER 2002 – REVISED DECEMBER 2014
Feature Description (continued)
7.2.5 High-gain Sallen-key Active Filters
The LMH6624 and LMH6626 devices are well suited for high gain Sallen-Key type of active filters. Figure 53
shows the 2^nd order Sallen-Key low pass filter topology. Using component predistortion methods discussed in
Application Note OA-21, Component Pre-Distortion for Sallen Key Filters (SNOA369) will enable the proper
selection of components for these high-frequency filters.
C₁
R₁
R₂
C₂
+
-
R_F
R_G
Figure 53. Sallen-Key Active Filter Topology
7.2.6 Low Noise Magnetic Media Equalizer
The LMH6624 and LMH6626 devices implement a high-performance low noise equalizer for such application as
magnetic tape channels as shown in Figure 54. The circuit combines an integrator with a bandpass filter to
produce the low noise equalization. The circuit’s simulated frequency response is illustrated in Figure 55.
Figure 54. Low Noise Magnetic Media Equalizer
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