Datasheet

LM4782, LM4782TABD
www.ti.com SNAS231B –FEBRUARY 2004–REVISED MARCH 2013
INVERTING AMPLIFIER APPLICATION
The inverting amplifier configuration may be used instead of the more common non-inverting amplifier
configuration shown in Figure 1. The inverting amplifier can have better THD+N performance and eliminates the
need for a large capacitor (Ci) reducing cost and space requirements. The values show in Figure 51 are only one
example of an amplifier with a gain of 20V/V (Gain = -R
f
/R
i
). For different resistor values, the value of R
B
should
be eqaul to the parallel combination of R
f
and Ri.
If the DC blocking input capacitor (C
IN
) is used as shown, the lower -3dB point is found using Equation 7 as
discussed in the PROPER SELECTION OF EXTERNAL COMPONENTS section.
Figure 51. Inverting Amplifier Application Circuit
Copyright © 2004–2013, Texas Instruments Incorporated Submit Documentation Feedback 25
Product Folder Links: LM4782 LM4782TABD