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LM4912 Datasheet Stereo 40mw Low Noise Headphone Amplifier

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM4912 Stereo 40mW Low Noise Headphone Amplifier June 2003 LM4912 Stereo 40mW Low Noise Headphone.

General Description

The LM4912 is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16Ω load or 25mW per channel into a 32Ω load at 1% THD form a 3V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components.

Since the LM4912 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.

Key Features

  • a low-power consumption shutdown mode and a power mute mode that allows for faster turn on time with less than 1mV voltage change at outputs on release. Additionally, the LM4912 features an internal thermal shutdown protection mechanism. The LM4912 is unity gain stable and may be configured with external gain-setting resistors. Key Specifications n PSRR at 217 Hz and 1kHz 65dB (typ) n Output Power at 1kHz with VDD = 2.4V, 1% THD+N into a 16Ω load 25mW (typ) n Output Power at 1kHz with VDD = 3V,.

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