General Description
DA7217 is a high-performance, low-power audio codec optimized for use in headsets or wearable devices. It has differential headphone outputs for use inside headset devices, offering excellent left to right channel separation and common mode noise rejection. DA7217 also has a stereo DAC to headphone output path and ultra-low power operating modes to support always-on audio detect applications.
DA7217 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 DA7218, has single-ended headphone outputs, and has been designed with headphone detect for use in accessories.

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 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
■ A high efficiency two-level, true-ground charge
   pump for generating class-G headphone
   supplies
■ 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
■ The headphone amplifier can be run directly
   from the supply, thus eliminating the need for
   charge pump capacitors

APPLICATIONs
■ Hearables
■ Wireless and wired headphones
■ Wireless and wired headsets