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LM4809LDX/NOPB-LM4809MMX/NOPB
Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode
LM4809, LM4809LQBD
www.ti.com SNAS126F –FEBRUARY 2001–REVISED APRIL 2013
LM4809 Dual 105mW Headphone Amplifier with Active-
Low Shutdown Mode
Checkfor Samples: LM4809, LM4809LQBD
1FEATURES DESCRIPTIONThe LM4809isa dual audio power amplifier capable
Active-Low Shutdown Mode of delivering 105mW per channel of continuous
• "Click and Pop" Reduction Circuitry average power intoa 16Ω load with 0.1% (THD+N)
Low Shutdown Current froma 5V power supply.
WSON, MSOP, and SOIC Surface Mount Boomer audio power amplifiers were designed
Packaging specificallyto provide high quality output power witha
minimal amountof external components. Since the
• No Bootstrap Capacitors RequiredLM4809 does not require bootstrap capacitors or
• Unity-Gain Stable snubber networks,itis optimally suited for low-power
portable systems.
APPLICATIONSThe unity-gain stable LM4809 can be configured by
• Headphone Amplifier external gain-setting resistors.
• Personal Computers The LM4809 features an externally controlled, active-
• Microphone Preamplifier low, micropower consumption shutdown mode, as
PDA's well as an 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)
