Class D audio amplifier

4 April 2012 Analogue, Mixed Signal, LSI

STMicroelectronics has introduced an analog class D audio amplifier that packs 320 W of total output power – 160 W on each channel – on an area of 100 mm². The TDA7498E enables the design of platform solutions where the speaker impedance can be simply changed – from 8 down to 2 Ω – without any power or current limitation. It includes built-in suppression of pop/click noises, standby and mute functionality, and balanced input for best TDMA noise rejection. The device embeds smart current protection, which recognises when the speaker requires a peak of current for a specific frequency range and automatically prevents any interruptions in the sound flow. It exhibits a signal-to-noise ratio of 100 dB and provides four selectable, fixed-gain settings at 23,8 dB, 29,8 dB, 33,3 dB and 35,8 dB.

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