LM4832

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LM4832 Features

• Independent Left and Right Output Volume Controls
• Treble and Bass Control
• National 3D Sound
• I²C Compatible Interface
• Two Microphone Inputs with Selector
• Software Controlled Shutdown Function

LM4832 Description

The LM4832 is a monolithic integrated circuit that provides volume and tone (bass and treble) controls as well as a stereo audio power amplifier capable of producing 250 mW (typ) into 8 or 90 mW (typ) into 32 with less than 1.0% THD. In addition, a two input microphone preamp stage, with volume control, capable of driving a 1 k load is implemented on chip.

The LM4832 also features National's 3D Sound circuitry which can be externally adjusted via a simple RC network. For maximum system flexibility, the LM4832 has an externally controlled, low-power consumption shutdown mode, and an independent mute for power and microphone amplifiers .

BoomerŪ audio integrated circuits were designed specifically to provide high quality audio while requiring few external components. Since the LM4832 incorporates tone and volume controls, a stereo audio power amplifier and a microphone preamp stage, it is optimally suited to multimedia monitors and desktop computer applications.

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