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Integrated audio click-and-pop suppressor

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MAXIM Integrated Products, represented by Arrow Electronics , has introduced the MAX9890, the world's first integrated, low-cost audio click-and-pop suppressor.

The MAX9890 enhances the performance of existing CODEC/headphone amplifier solutions by suppressing the audible click-and-pop noise commonly present on power and shutdown cycles.

The device requires only one additional small 0.1 microfarad capacitor to provide a complete solution. This low-cost, ultra-compact solution is ideal for compact, portable equipment such as notebook PCs, cell phones, portable DVD players, and PDAs.

The MAX9890 is offered in two versions to optimize the audio-click suppression based on the size of the dc-blocking capacitors in use.

The MAX9890A is optimized for use with dc-blocking capacitors of up to 100 microfarad and the MAX9890B is optimized for use with dc-blocking capacitors of up to 220 microfarad.

The MAX9890 operates over a 2.7V to 5.5V supply range, provides 23dB of click-and-pop suppression, requires only 20 microamps of supply current, and contributes less than 0.006% THD+N into a 32 ohm load.

The device includes ±8kV ESD (Human Body Model) protection circuitry on the outputs.

The MAX9890 is available in tiny 9-pin UCSP (1.5mm x 1.5mm x 0.6mm) and 8-pin TDFN (3mm x 3mm x 0.8mm) packages. The device is specified for operation over the -40ºC to +85ºC extended temperature range.

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