Datasheet

LM4906, LM4906LDBD, LM4906MMBD
SNAS191E –APRIL 2003–REVISED MAY 2013 www.ti.com
The final design step is to address the bandwidth requirements which must be stated as a pair of −3dB
frequency points. Five times away from a −3dB point is 0.17dB down from passband response which is better
than the required ±0.25dB specified.
f
L
= 100Hz / 5 = 20Hz
f
H
= 20kHz * 5 = 100kHz
As stated in the External Components Description section, R
in
(20k) in conjunction with C
2
create a highpass
filter.
C
2
≥ 1 / (2π*20kΩ*20Hz) = 0.397µF; use 0.39µF
Figure 26. REFERENCE DESIGN BOARD SCHEMATIC
12 Submit Documentation Feedback Copyright © 2003–2013, Texas Instruments Incorporated
Product Folder Links: LM4906 LM4906LDBD LM4906MMBD