LM49200TLEVAL Datasheet | Texas Instruments

FEATURES - 2 Differential Mono Input and Stereo Single Ended Input - 32-Step Digital Volume Control (-80 to +18d B) - Three Independent Volume Channels (Left, Right, Mono) - Separate Headphone Volume Control - Flexible Output for Speaker and Headphone Output - True Ground Headphone Amplifier Eliminates Large DC Blocking Capacitors Reducing PCB Space and Cost - Receiver Pass-Through Capability - Soft Enable Function - RF Immunity Topology - “Click and Pop” Suppression Circuitry - Thermal Shutdown Protection - Micro-Power Shutdown - I2C Control Interface - Available in Space-Saving DSBGA Package KEY SPECIFICATIONS - Supply Voltage (VDD): 2.7V ≤ VDD ≤ 5.5V - I2C Supply Voltage: 1.7V ≤ I2CVDD ≤ 5.5V - Output power at VDD = 5V, 1% THD+N - RL = 8Ω speaker: 1.25W (typ) - RL = 32Ω headphone: 38m W (typ) - Output power at VDD = 3.3V, 1% THD+N - RL = 8Ω speaker: 520W (typ) - RL = 32Ω headphone: 38m W (typ) - PSRR: - VDD = 3.3V, 217Hz ripple, Mono In: 95d B (typ) - Shutdown power supply current 0.02μA (typ) APPLICATIONS - Portable Electronic Devices - Mobile Phones - PDAs DESCRIPTION The LM49200 is a fully integrated audio subsystem with a stereo power amplifier capable of delivering 500m W of continuous average power per channel into 8Ω with 1% THD+N using a 3.3V supply. The LM49200 includes a separate stereo headphone amplifier that can deliver 35m W per channel into 32Ω. The LM49200 has three input channels. A pair of single-ended inputs and a fully differential input channel. The LM49200 features a 32-step digital volume control on the input stage and an 8-step digital volume control on the headphone output stage. The digital volume control and output modes are programmed through a two-wire I2C patible interface that allows flexibility in routing and mixing audio...