LM4934 Datasheet | National Semiconductor

.. LM4934 3D Audio Sub-System with Stereo Speaker, OCL/SE Stereo Headphone, Earpiece and Mono Line Level Outputs November 2005 LM4934 3D Audio Sub-System with Stereo Speaker, OCL/SE Stereo Headphone, Earpiece and Mono Line Level Outputs General Description The LM4934 is an integrated audio sub-system designed for stereo cell phone applications. Operating on a 3.3V supply, it bines a stereo speaker amplifier delivering 520m W per channel into an 8Ω load, a stereo headphone amplifier delivering 36m W per channel into a 32Ω load, a mono earpiece amplifier delivering 55m W into a 32Ω load, and a line output for an external powered handsfree speaker. It integrates the audio amplifiers, volume control, mixer, power management control, and National 3D enhancement all into a single package. In addition, the LM4934 routes and mixes the stereo and mono inputs into multiple distinct output modes. The LM4934 Features an I2S serial interface for full range audio and an I2C/SPI patible interface for control. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external ponents. Key Specifications j POUT, Stereo BTL, 8Ω, 3.3V, 1% THD+N j POUT HP, 32Ω, 3.3V, 1% THD+N j POUT Mono Earpiece, 32Ω, 3.3V, 520m W (typ) 36m W (typ) 55m W (typ) 0.6µA (typ) 95d B (typ) 1% THD+N j Shutdown current j DAC SNR Features n n n n n n n n n n n 18-bit stereo DAC Multiple distinct output modes Stereo speaker amplifier Stereo headphone amplifier Mono earpiece amplifier Mono Line Output for external handsfree carkit Independent Left, Right, headphone and Mono speaker volume controls National 3D enhancement with programmable effect level I2C/SPI (selectable) patible interface Ultra low shutdown current Click and Pop Suppression circuit Applications n Cell Phones n PDAs Boomer ® is a registered trademark of National Semiconductor Corporation. © 2005 National Semiconductor Corporation DS201669 .national....