Analog Devices is offering a pair of Class-D audio amplifiers the SSM2375 and SSM2380 designed to provide audio system designers with the option of fixed or programmable gain settings combined with low noise performance.

The SSM2380 incorporates an I²C interface, which allows gain stages to be set from 1dB to 24dB (plus mute) in 47 distinct steps with no other external components required.

The programmable interface also enables independent L/R channel shutdown, a variable low-EMI (electro-magnetic interference) emission control mode, and programmable ALC (automatic level control) functions for speaker protection.  

The SSM2375 is a Class-D amplifier with single-pin 5-level gain setting in 3dB stages from 0dB to 12dB.

Operating from a single 2.5V to 5V supply, the amplifier delivers 3W of continuous output power with less than 1% THD (total harmonic distortion) when driving a 3ohm load from a 5V supply.