DA7218 Ultra-Low Power Stereo Codec 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. DA7218 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. Key Features High performance stereo DAC to headphone Flexible digital mixing from all seven inputs to playback path with 110 dB dynamic range all six outputs with independent gain on each mixer path 4 mW stereo playback power consumption Ability to run the ADCs at a different sample DAC digital filters with audio and voice mode 2 rate to the DACs on a single I S interface options, five-band equalizer and five programmable biquad stages Digital tone generator with built-in support for DTMF Dedicated low-latency digital sideband filter with three programmable biquad stages System controller for simplified, pop-free start- up and shutdown High performance microphone to ADC record path with a 105 dB dynamic range Phase-locked loop with sample rate tracking supporting MCLK frequencies from 2 MHz to 2.5 mW stereo record power consumption 54 MHz ADC digital filters with audio and voice mode Automatic tuning of on-chip reference options oscillator for clock-free operation in low-power 500 W always-on record mode with modes automatic level detection 4-wire digital audio interface with support for 2 2 Hybrid analog / digital automatic level control I S, four-channel I S, TDM and other audio to dynamically control the record level formats 2 Shutdown mode offering current consumption 2-wire I C compatible control interface with during standby of 2.5 A support for High Speed mode up to 3.4 MHz Two low-noise microphone bias regulators 24-bit data at up to 96 kHz sample rate with programmable output voltage and ultra- A high efficiency two-level, true-ground charge low power mode pump for generating class-G headphone Ability to differentiate between stereo and supplies mono headsets Voice mode filtering up to 32 kHz Automatic detection of headset removal and confirmation of headset insertion Applications Wired headsets Portable media players Wired headphones Gaming console controllers Audio accessories Tablets and eBooks Datasheet Revision 3.3 01-May-2018 CFR0011-120-00 1 of 169 2018 Dialog Semiconductor DA7218 Ultra-Low Power Stereo Codec System Diagram Single-Ended Output Microphone Inputs External DA7218 Headphone Analog or Headset or Headphone Digital detect Control Digital Audio Interface Interface Applications Processor Figure 1: DA7218 with Single-Ended Headset Outputs Datasheet Revision 3.3 01-May-2018 CFR0011-120-00 2 of 169 2018 Dialog Semiconductor