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LM4834MS Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4834MS Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 12 page  LM4834 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp General Description The LM4834 is a monolithic integrated circuit that provides DC volume control, and a bridged audio power amplifier ca- pable of producing 1.75W into 4 Ω with less than 1.0% (THD). In addition, the headphone/lineout amplifier is ca- pable of driving 70 mW into 32 Ω with less than 0.1%(THD). The LM4834 incorporates a volume control and an input mi- crophone preamp stage capable of drivinga1k Ω load im- pedance. Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components in surface mount packaging. The LM4834 incorporates a DC volume control, a bridged audio power amplifier and a microphone preamp stage, making it optimally suited for multimedia monitors and desk- top computer applications. The LM4834 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance. Key Specifications n THD at 1.1W continuous average output power into 8 Ω at 1 kHz 0.5%(max) n Output Power into 4 Ω at 1.0% THD+N 1.75W(typ) n THD at 70mW continuous average output power into 32 Ω at 1 kHz 0.1%(typ) n Shutdown Current 1.0µA(max) n Supply Current 17.5mA(typ) Features n PC98 Compliant n “Click and Pop” suppression circuitry n Stereo line level outputs with mono input capability for system beeps n Microphone preamp with buffered power supply n DC Volume Control Interface n Thermal shutdown protection circuitry Applications n Multimedia Monitors n Desktop and Portable Computers Block Diagram Connection Diagram Boomer® is a registered trademark of NationalSemiconductor Corporation. DS100015-1 FIGURE 1. LM4834 Block Diagram SSOP Package DS100015-2 Top View Order Number LM4834MS See NS Package Number MSA028CB for SSOP November 1997 © 1997 National Semiconductor Corporation DS100015 www.national.com |
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