LM4832 Datasheet | National Semiconductor

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 m W (typ) into 8Ω or 90 m W (typ) into 32Ω with less than 1.0% THD. In addition, a two input microphone preamp stage, with volume control, capable of driving a 1 kΩ 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 . Boomer ® audio integrated circuits were designed specifically to provide high quality audio while requiring few external ponents. 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 puter applications. Key Specifications n Output Power at 10% into: 8Ω 32Ω n THD + N at 75 m W into 32Ω at 1 k Hz n Microphone Input Referred Noise n Supply Current n Shutdown Current 350 m W(typ) 100 m W(typ) 0.5%(max) 7 µV(typ) 13 m A(typ) 4 µA(max) Features n n n n n n Independent Left and Right Output Volume Controls Treble and Bass Control National 3D Sound I2C patible Interface Two Microphone Inputs with Selector Software Controlled Shutdown Function Applications n Multimedia Monitors n Portable and Desktop puters Block Diagram Connection Diagram DS100014-2 DS100014-1 FIGURE 1. LM4832 Block Diagram Top View Order Number LM4832N, LM4832M See NS Package Number N28B for DIP See NS Package Number M28B for SOIC Boomer ® is a registered trademark of National Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100014 .national. Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for...