LM4834 Datasheet | National Semiconductor

Description The LM4834 is a monolithic integrated circuit that provides DC volume control, and a bridged audio power amplifier capable of producing 1.75W into 4Ω with less than 1.0% (THD). In addition, the headphone/lineout amplifier is capable of driving 70 m W into 32Ω with less than 0.1%(THD). The LM4834 incorporates a volume control and an input microphone preamp stage capable of driving a 1 kΩ load impedance. Boomer ® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external ponents 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 desktop puter 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 8Ω at 1 k Hz n Output Power into 4Ω at 1.0% THD+N n THD at 70m W continuous average output power into 32Ω at 1 k Hz n Shutdown Current n Supply Current 0.5%(max) 1.75W(typ) 0.1%(typ) 1.0µA(max) 17.5m A(typ) Features n PC98 pliant 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 puters Block Diagram Connection Diagram SSOP Package DS100015-2 DS100015-1 FIGURE 1. LM4834 Block Diagram Top View Order Number LM4834MS See NS Package Number MSA028CB for SSOP Boomer ® is a registered trademark of National Semiconductor Corporation. © 1997 National Semiconductor Corporation DS100015 .national. Absolute Maximum Ratings (Note 2) Infrared (15 sec.) 220˚C If Military/Aerospace specified devices are required, please contact...