Datasheet

LM4950
www.ti.com SNAS174E –JULY 2003–REVISED MAY 2013
Figure 4. Typical Stereo Single-Ended (SE) Audio Amplifier Application Circuit
External Components Description
See Figure 1.
Components Functional Description
This is the inverting input resistance that, along with R
F
, sets the closed-loop gain. Input resistance R
IN
and input
1. R
IN
capacitance C
IN
form a high pass filter. The filter's cutoff frequency is f
c
= 1/(2πR
IN
C
IN
).
This is the input coupling capacitor. It blocks DC voltage at the amplifier's inverting input. C
IN
and R
IN
create a highpass
2. C
IN
filter. The filter's cutoff frequency is f
C
= 1/(2πR
IN
C
IN
). Refer to SELECTING EXTERNAL COMPONENTS, for an
explanation of determining C
IN
's value.
3. R
F
This is the feedback resistance that, along with R
i
, sets closed-loop gain.
The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING for information about properly placing, and
4. C
S
selecting the value of, this capacitor.
This capacitor filters the half-supply voltage present on the BYPASS pin. Refer to SELECTING EXTERNAL
5. C
BYPASS
COMPONENTS for information about properly placing, and selecting the value of, this capacitor.
Copyright © 2003–2013, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: LM4950