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LM4831 Folha de dados(PDF) 1 Page - National Semiconductor (TI) |
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LM4831 Folha de dados(HTML) 1 Page - National Semiconductor (TI) |
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1 / 12 page ![]() LM4831 Multimedia Computer Audio Chip General Description The LM4831 is a monolithic integrated circuit that provides a stereo three input mixer, two stereo input analog multiplexer, a stereo line out and a dual 1W bridged audio power ampli- fier. In addition, a low noise microphone preamp is included on-chip. The LM4831 is ideal for multimedia computers since it incor- porates an input mixer, analog multiplexer, and configurable stereo audio power amplifier, as well as a microphone preamp stage. This combination allows for all of the analog audio processing to be enclosed in a 44-pin TQFP package. The LM4831 features an externally controlled, low-power consumption shutdown mode, as well as both headphone and docking station modes. To temporarily override the shut- down mode and allow audio signals to be amplified, the LM4831 provides four “beep” pins. Key Specifications n THD+N at 1W into 8 Ω 0.6% (typ) n Microphone Input Referred Noise 10µV (typ) n Supply Current - Bridged Mode 16mA (typ) n Shutdown Current 2µA (typ) Features n Stereo 1W audio power amplifier n “Click and pop” suppression circuitry n Stereo three input mixer n Shutdown mode n Multiple operating modes — bridged, single-ended and docking station modes n Internal mux for switching in/out external filter n Beep circuitry for “wake-up” while in shutdown n 44 Pin TQFP Packaging Applications n Portable and Desktop Computers Block Diagram Connection Diagram Boomer® is a registered trademark of National Semiconductor Corporation. TRI-STATE® is a registered trademark of National Semiconductor Corporation. DS100057-1 FIGURE 1. LM4831 Block Diagram DS100057-3 Top View Order Number LM4831VF See NS Package Number VEJ44A November 1998 © 1998 National Semiconductor Corporation DS100057 www.national.com |
Nº de peça semelhante - LM4831 |
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Descrição semelhante - LM4831 |
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