Analog Devices MAX98050 Product Info

• Low-Latency Digital Filter Channels
  • 96kHz/192kHz/384kHz Sample Rate Options
  • Channel Support Applications Including Feed-Forward (FF) and Feedback (FB) ANC, Ambient/Voice Enhancement and Transparency, and Playback Compensation
  • Filters Allowing Smooth, Dynamic Transitions / Updates without Playback Disruption
• Mono Headphone Playback Channel
  • High-Efficiency Hybrid Class-AB/D Amplifier
  • 114dB Playback Dynamic Range
  • 2.55mW P_Q (f_S = 48kHz, No Noise Gate)
  • 1.9mW P_Q (f_S = 48kHz, With Noise Gate)
• Three Microphone Record Channels 
  • Analog or Digital Microphone Inputs
  • 107dB Dynamic Range (AMIC Single-Ended)
  • 113dB Dynamic Range (AMIC Differential))
  • 5.3mW P_Q (f_S = 16kHz, 2 AMIC Record)
  • 2.1mW P_Q (f_S = 16kHz, 2 DMIC Record)
• Playback with ANC Filter Profile (f_S = 192kHz)
  • 9.85mW P_Q (AMIC FF+FB Profile)
  • 6.7mW P_Q (AMIC FF Only Profile)
  • 7mW P_Q (DMIC FF+FB Profile)
• Full-Scale Playback Power at 1% THD+N:
  • 31mW into 32Ω (1V_RMS Full-Scale Mode)
  • 15mW into 32Ω (Reduced Swing Mode)
  • 61mW into 16Ω (1V_RMS Full-Scale Mode)
• Flexible I²S/TDM Digital Audio Interface
  • Support for 16/24/32-Bit Audio Data
  • Playback Sample Rates of 8kHz to 192kHz 
  • No High-Speed Master Clock Required 
• Audio CODEC Evaluation Platform Available
  
  

The MAX98050 is a low-power, high-performance audio CODEC with integrated low-latency digital filters for wireless hearables, headsets, and headphones.

The device features a mono playback channel with a 5-band biquad equalizer and a high-efficiency, fully differential hybrid class-AB/class-D headphone amplifier. The playback headphone amplifier is optimized for extremely low output noise levels and minimized quiescent power consumption while maximizing output power efficiency.

The device 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 (to the digital audio interface) 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 that can 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. In addition, 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 filter and use case transitions, the biquad filters and volume controls provide banked profiles that can be updated/swapped without disruption to audio playback.

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