SPI programmable 32 step digital volume control (-40.5dB to +6dB)
Eight distinct SPI programmable output modes
micro-SMD and LLP surface mount packaging
"Click and pop" suppression circuitry
Thermal shutdown protection
Low shutdown current (0.1µA, typ)
Description
The LM4851 is an audio power amplifier system capable of delivering 1.1W (typ) of continuous average power into a mono 8 bridged-tied load (BTL) with 1% THD+N and 115mW (typ) per channel of continuous average power into stereo 32 BTL loads with 0.5% THD+N, using a 5V power supply.
The LM4851 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 LM4851 has 3 inputs: one pair for a two-channel stereo signal and the third for a single-channel mono input.
The LM4851 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 five external components.
The industry leading micro SMD package utilizes only 2mm x 2.3mm of PCB space, making the LM4851 the most space efficient audio sub system available today.
bridged-tied load (BTL) with 1% THD+N and 115mW (typ) per channel of continuous average power into stereo 32
