The LM49200 is a fully integrated audio subsystem with a stereo power amplifier capable
of delivering 500mW 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 35mW 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 compatible interface that allows flexibility in routing and mixing
The LM49200 is designed for cellular phone, PDA, and other portable handheld
applications. The high level of integration minimizes external components. The True Ground
headphone amplifier eliminates the physically large DC blocking output capacitors reducing required
board space and reducing cost.
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