General Description
The DA7219 is an ultra low-power audio codec with Advanced Accessory Detection (AAD), which supports sample rates up to 96 kHz at 24-bit resolution. It contains a mono microphone to analog to digital converter (ADC) path, and a stereo digital to analog converter (DAC) to headphone (HP) path. 
AAD supports the detection and identification of 3-pole (headphone) and 4-pole (headset) jacks, and allows the automatic pin order switching of MIC/GND on CTIA or OMTP headsets. It also supports automatic multiple button detection.

KEY FEATUREs
■ Android Wired Headset v1.1 compliant
■ High performance mono microphone to ADC
   record path with 90 dB SNR
   □ ADC digital filters with Audio and Voice
      mode high-pass characteristics
   □ 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 cutoff and 5-band
      equalizer
■ Advanced Accessory Detect supports
   □ 3-pole and 4-pole jack detection
   □ MIC/GND polarity switching
   □ Multiple button detection
   □ Headphone impedance testing
■ Microphone input with automatic level control
■ Digital sidetone path with gain
■ Digital tone generator
■ System controller for simplified pop-free startup and shut-down
■ Mixed sample rates of 24 kHz ADC, 48 kHz
   DAC supported from a single digital interface
■ Sample rates of up to 96 kHz at 24-bit
   resolution
■ Shut-down mode for very low current
   consumption during standby
■ Phase locked loop with WCLK tracking to
   generate system clock
■ 4-wire digital audio interface with support for
   I2S, TDM and other audio formats
■ 2-wire I2C compatible interface with support
   for High Speed mode up to 3.4 MHz
■ 4.5 mm x 1.6 mm WLCSP RouteEasy™
   package for low cost PCB manufacture

APPLICATIONs
■ Chromebooks
■ Portable audio applications
■ Tablets and eBooks
■ All digital distributed systems
■ Headphone accessories
■ Remote controllers
■ Gaming controllers