DA7218

DA7218

Ultra low power stereo codec with single ended headphone driver

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High-performance, low-power audio codec

DA7218 is a high-performance, low-power audio codec optimized for use in portable applications or wearable devices. It has single-ended headphone outputs with headphone detect for use in accessories, offering excellent left to right channel separation and common mode noise rejection.

DA7218 also has a stereo DAC to headphone output path and ultra-low power operating modes to support always-on audio detect applications. It contains two analog microphone input paths, or up to four digital microphone input paths, or a combination of both. The other chip in this family, the DA7217 has differential headphone outputs without headphone detect, and has been designed for use inside headset devices.

Features

  • High performance stereo DAC to headphone playback path with 110 dB dynamic range
  • 4 mW stereo playback power consumption
  • DAC digital filters with audio and voice mode options, five-band equalizer and five programmable biquad stages
  • Dedicated low-latency digital sideband filter with three programmable biquad stages
  • High performance microphone to ADC record path with a 105 dB dynamic range
  • 2.5 mW stereo record power consumption
  • ADC digital filters with audio and voice mode options
  • 500µW always-on record mode with automatic level detection
  • Hybrid analog / digital automatic level control to dynamically control the record level
  • Shutdown mode offering current consumption during standby of 2.5µA
  • Two low-noise microphone bias regulators with programmable output voltage and ultralow power mode
  • Ability to differentiate between stereo and mono headsets
  • Automatic detection of headset removal and confirmation of headset insertion

Benefits

  • Superior hi-fidelity audio performance for immersive record and playback
  • Sub 500µW always-on power extends battery life for audio activity detection
  • Flexible programming filtering (sideband, voice) enhances voice and audio playback
  • Mixed sample rate support for wideband applications
  • Supports the latest generation of low power analog and digital microphones
  • Small package footprint with an optimized ballout conducive to low cost PCB manufacturing

Applications

  • Wired headsets
  • Wired headphones
  • Audio accessories
  • Portable gaming controller
  • Tablets and eReaders

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