lm4883sqx National Semiconductor Corporation, lm4883sqx Datasheet - Page 2

• Manufacturer Part Number: lm4883sqx
• Description: Dual 2.1w Audio Amplifier Plus Stereo Headphone
• Manufacturer: National Semiconductor Corporation

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Typical Application
External Components Description
(Refer to Figure 1)
1.
2.
3.
4.
5.
Components
R1, 4, 5, 6
C1, 2, 3, 4
R2, 3, 7, 8
C6
C5
The inverting input resistance R1, along with R
form a high pass filter with f
The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. C
R
EXTERNAL COMPONENTS, for an explanation of determining the value of C
The feedback resistance, along with R
The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for
information about properly placing, and selecting the value of, this capacitor.
The capacitor, C
SELECTING PROPER EXTERNAL COMPONENTS section for information concerning proper
placement and selecting C
1
, create a highpass filter with f
FIGURE 1. Typical Audio Amplifier Application Circuit
5
, filters the half-supply voltage present on the BYPASS pin. Refer to the
5
’s value.
c
= 1/(2πR
c
= 1/(2πR
2
Functional Description
1
1
C
sets the closed-loop gain.
1
).
1
C
1
). Refer to the section, SELECTING PROPER
3
, set the closed-loop gain. R
1
, along with C
1
.
1
, along with
1
200887A1
,