The LM4855 is an audio power amplifier system capable of delivering 1.1W (typ) of
continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and 115mW (typ) per
channel of continuous average power into stereo 32Ω BTL loads with 0.5% THD+N, using a 5V power
The LM4855 features a 32 step digital volume control and eight distinct output modes. The
digital volume control and output modes are programmed through a three-wire SPI serial control
interface, that allows flexibility in routing and mixing audio channels.
The LM4855 is designed for cellular phone, PDA, and other portable handheld applications.
It delivers high quality output power from a surface-mount package and requires only six external
The industry leading DSBGA package only utilizes 2mm x 2.3mm of PCB space, making the
LM4855 the most space efficient audio sub system available today.
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