General Description
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.

KEY 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
■ 500 µW 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 2.5 µA
■ 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
■ Voice mode filtering up to 32 kHz
■ Flexible digital mixing from all seven inputs to
   all six outputs with independent gain on each
   mixer path
■ Ability to run the ADCs at a different sample
   rate to the DACs on a single I2S interface
■ Digital tone generator with built-in support for
   DTMF
■ System controller for simplified, pop-free startup and shutdown
■ Phase-locked loop with sample rate tracking
   supporting MCLK frequencies from 2 MHz to
   54 MHz
■ Automatic tuning of on-chip reference
   oscillator for clock-free operation in low-power
   modes
■ 4-wire digital audio interface with support for
   I2S, four-channel I2S, TDM and other audio
   formats
■ 2-wire I2C compatible control interface with
   support for High Speed mode up to 3.4 MHz
■ 24-bit data at up to 96 kHz sample rate
■ A high efficiency two-level, true-ground charge
   pump for generating class-G headphone
   supplies

APPLICATIONs
■ Wired headsets
■ Wired headphones
■ Audio accessories
■ Portable media players
■ Gaming console controllers
■ Tablets and eBooks