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LM4910 Output Capacitor-less Stereo 35mW Headphone Amplifier


Package | PIN: DGK | 8
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.38
10-24 $1.23
25-99 $1.14
100-249 $0.98
250-499 $0.90
500-749 $0.74
750-999 $0.59
1000+ $0.53


  • Eliminates headphone amplifier output coupling capacitors
  • Eliminates half-supply bypass capacitor
  • Advanced pop & click circuitry eliminates noises during turn-on and turn-off
  • Ultra-low current shutdown mode
  • Unity-gain stable
  • 2.2V - 5.5V operation
  • Available in space-saving MSOP, LLP, and SOIC packages

  • Texas Instruments  LM4910MM/NOPB

    The LM4910 is an audio power amplifier primarily designed for headphone applications in portable device applications. It is capable of delivering 35mW of continuous average power to a 32Ω load with less than 1% distortion (THD+N) from a 3.3VDC power supply.

    The LM4910 utilizes a new circuit topology that eliminates output coupling capacitors and half-supply bypass capacitors. The LM4910 contains advanced pop & click circuitry which eliminates noises caused by transients that would otherwise occur during turn-on and turn-off.

    Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4910 does not require any output coupling capacitors, half-supply bypass capacitors, or bootstrap capacitors, it is ideally suited for low-power portable applications where minimal space and power consumption are primary requirements.

    The LM4910 features a low-power consumption shutdown mode, activated by driving the shutdown pin with logic low. Additionally, the LM4910 features an internal thermal shutdown protection mechanism. The LM4910 is also unity-gain stable and can be configured by external gain-setting resistors.

    Key Specifications

    PSRR at f = 217Hz

    65dB (typ)

    Power Output at VDD = 3.3V, RL = 32Ω, and THD 1%

    35mW (typ)

    Shutdown Current

    0.1µA (typ)