Audio CODEC optimised for extremely low output noise levels

Maxim Integrated MAX98050 Audio CODEC, available now from Mouser, is a high-performance, low-power device with integrated low-latency digital filters for wireless hearables, headsets, and headphones. The device provides a mono playback channel with a five-band biquad equaliser and a high-efficiency, fully differential hybrid class-AB/class-D headphone amplifier. The playback headphone amplifier is optimised for exceptionally low output noise levels and minimised quiescent power consumption while maximising output power efficiency.

The device includes three microphone input channels able to support voice, ambient, and anti-noise record use cases. Each channel can record individually from either an external analog or digital microphone and can then route audio data to the record channels and the internal low-latency digital filter channels. A fourth record channel to the digital audio interface is offered to enable the host to monitor the playback channel output digital data.

The flexible digital audio interface supports common PCM audio data formats such as I2S, left-justified, and TDM timing with 16-bit, 24-bit, or 32-bit data word and channel lengths. The PCM interface supports playback sample rates from 8kHz to 192kHz and record sample rates from 8kHz to 48kHz. The device needs external bit and frame clocks but removes the requirement for a high-speed external master clock.

The audio CODEC is offered in a small 6.7mm2 WLP32 package with a low 0.5mm height excellent for tight form factors. The device operates over the extended -40C to +85C temperature range.