Analog Devices Inc. MAX98050 Audio CODEC

The MAX98050 includes three microphone input channels capable of supporting voice, ambient, and anti-noise record use cases. Each channel can individually record from either an external analog or digital microphone and then can route audio data to both the record channels and the internal low-latency digital filter channels. A fourth record channel to the digital audio interface is provided to allow the host to monitor the playback channel output digital data.

Two low-latency digital filter channels are provided to support a variety of use cases. These include noise cancellation applications (feed-forward, feedback, and hybrid filter profiles), both voice and ambient enhancement and transparency applications, and sidetone applications. Each channel provides a 12-band digital biquad filter, a DRC or Limiter stage, a digital volume control block, and an ultrasound filter. Also, a third internal digital filter channel is provided in the playback channel that is structured for playback compensation and/or general feedback compensation filters. This channel includes a 10-band biquad filter and a digital volume control block. To support dynamic or adaptive filters and use case transitions, the biquad filters and volume controls provide banked profiles that can be updated/swapped without disruption to audio playback.

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 requires external bit and frame clocks but eliminates the need for a high-speed external master clock.

The Analog Devices MAX98050 Audio CODEC is available in a small 6.7mm² WLP32 package with a low 0.5mm height ideal for tight form factors. The device operates over an extended -40°C to +85°C temperature range.