General description
The DA7219 is an audio codec with Advanced Accessory Detection (AAD).
DA7219 contains a mono microphone to ADC path, and a stereo DAC to HP path.
The AAD block supports three-pole (headphone) and four-pole (headset) jacks, and allows the automatic pin order switching of MIC/GND on CTIA or OMTP headsets. It also supports automatic button detection.

KEY FEATUREs
■ High performance mono microphone to ADC
   record path with 90 dB SNR
   □ ADC digital filters with audio and voice
      mode high-pass characteristics
   □ A low-noise microphone bias regulator
      with programmable output
■ High performance stereo DAC to headphone
   playback path with 100 dB SNR
   □ DAC digital filters with audio and voice
      mode high-pass cut-off and 5-band
      equaliser
■ Advanced Accessory Detection supports
   □ Three/four pole jack detection
   □ MIC/GND polarity switching
   □ Multiple button detection
   □ Headphone impedance testing
■ A microphone input with ALC (automatic
   level control)
■ Digital Sidetone path with gain
■ Digital tone generator
■ System controller for simplified pop-free
   start-up and shutdown
■ Single interface 24 kHz ADC/48 kHz DAC
   mixed sample rates supported
■ Shutdown mode for very low current
   consumption during standby
■ Phase locked loop with sample rate
   tracking to generate system clock
■ 4-wire digital audio interface with support
   for I2S, TDM and other audio formats
■ 2-wire I2C compatible with support for
   High Speed mode up to 3.4 MHz
■ WL-CSP RouteEasy™ package for low
   cost PCB manufacture