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


Package | PIN: DGK | 8
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.11
10-24 $0.99
25-99 $0.92
100-249 $0.78
250-499 $0.72
500-749 $0.59
750-999 $0.47
1000+ $0.42


  • Active-Low Shutdown Mode
  • Click and Pop Reduction Circuitry
  • Low Shutdown Current
  • WSON, MSOP, and SOIC Surface Mount Packaging
  • No Bootstrap Capacitors Required
  • Unity-Gain Stable

Key Specifications

  • THD+N at 1kHz at 105mW Continuous Average Power into 16Ω 0.1% (typ)
  • THD+N at 1kHz at 70mW Continuous Average Power into 32Ω 0.1% (typ)
  • Shutdown Current 0.4µA (typ)

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Texas Instruments  LM4809MM/NOPB

The LM4809 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16Ω 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. Since the LM4809 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.

The unity-gain stable LM4809 can be configured by external gain-setting resistors.

The LM4809 features an externally controlled, active-low, micropower consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.