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LM4809LDNSN/a50860avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809LDXNSN/a35887avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809LQNSN/a8428avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809LQXNSN/a7547avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809MANSN/a191avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809MAXNSCN/a203avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809MMNSCN/a25000avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809MMXNSCN/a3500avaiLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode


LM4809LD ,LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModeApplicationsn Headphone Amplifiern Personal Computersn Microphone Preamplifiern PDA’sTypical Applic ..
LM4809LDX ,LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModeFeaturessuited for low-power portable systems.n Active-low shutdown modeThe unity-gain stable LM480 ..
LM4809LDX/NOPB ,LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode 8-WSON -40 to 85Maximum Ratings indicate limits beyond which damage to the device may occur.(2) If Military/Aerospa ..
LM4809LQ ,LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModeLM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModeApril 2004LM4809Dual 105mW Headp ..
LM4809LQX ,LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModeApplicationsn Headphone Amplifiern Personal Computersn Microphone Preamplifiern PDA’sTypical Applic ..
LM4809MA ,LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown ModeElectrical Characteristics V =5V (Notes 2, 3)DDThe following specifications apply for V = 5V unless ..
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LM4809LD-LM4809LDX-LM4809LQ-LM4809LQX-LM4809MA-LM4809MAX-LM4809MM-LM4809MMX
LM4809 Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809
Dual 105mW Headphone Amplifier with Active-Low
Shutdown Mode
General Description

The LM4809isa dual audio power amplifier capableof
delivering 105mWper channelof continuous average power
intoa 16Ω load with 0.1% (THD+N) froma5V power supply.
Boomer audio power amplifiers were designed specificallyto
provide high quality output power witha minimal amountof
external components. Since the LM4809 does not require
bootstrap capacitorsor snubber networks,itis optimally
suitedfor low-power portable systems.
The unity-gain stable LM4809 canbe configuredby external
gain-setting resistors.
The LM4809 featuresan externally controlled, active-low,
micropower consumption shutdown mode,as wellasan
internal thermal shutdown protection mechanism.
Key Specifications
THD+Nat 1kHzat 105mW continuous average power
into 16Ω 0.1% (typ) THD+Nat 1kHzat 70mW continuous average power
into 32Ω 0.1% (typ) Shutdown Current 0.4µA (typ)
Features
Active-low shutdown mode "Click and Pop" reduction circuitry Low shutdown current LLP, MSOP, and SO surface mount packaging No bootstrap capacitors required Unity-gain stable
Applications
Headphone Amplifier Personal Computers Microphone Preamplifier PDA’s
Typical Application

*Refertothe Application Information Sectionfor information concerning proper selectionofthe inputand output coupling capacitors.
FIGURE1. Typical Audio Amplifier Application Circuit

April 2004
LM4809
Dual
105mW
Headphone
Amplifier
with
Active-Low
Shutdown
Mode
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