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LM4808 Datasheet

  • LM4808

  • Dual 105 mW Headphone Amplifier

  • 13頁(yè)

  • NSC

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LM4808 Dual 105 mW Headphone Amplifier
February 2000
LM4808
Dual 105 mW Headphone Amplifier
General Description
The LM4808 is a dual audio power amplifier capable of deliv-
ering 105 mW per channel of continuous average power into
a 16鈩?load with 0.1% (THD+N) from a 5V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components using surface mount packaging. Since
the LM4808 does not require bootstrap capacitors or snub-
ber networks, it is optimally suited for low-power portable
systems.
The unity-gain stable LM4808 can be configured by external
gain-setting resistors.
Key Specifications
n
THD+N at 1 kHz at 105 mW
continuous average output
power into 16鈩?/div>
n
THD+N at 1 kHz at 70 mW
continuous average output
power into 32鈩?/div>
n
Output power at 0.1% THD+N
at 1 kHz into 32鈩?/div>
0.1% (max)
0.1% (typ)
70 mW (typ)
Features
n
n
n
n
n
SOP and MSOP surface mount packaging
Switch on/off click suppression
Excellent power supply ripple rejection
Unity-gain stable
Minimum external components
Applications
n
Headphone Amplifier
n
Personal Computers
n
Microphone Preamplifier
Typical Application
Connection Diagram
SOP & MSOP Package
DS101276-2
Top View
Order Number LM4808M, LM4808MM
See NS Package Number M08A, MUA08A
DS101276-1
*Refer to the
Application Information
Section for information concerning
proper selection of the input and output coupling capacitors.
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2000 National Semiconductor Corporation
DS101276
www.national.com

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