DA7218 Datasheet, PDF (1/173 Pages) Dialog Semiconductor – Ultra-Low Power Stereo Codec

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
■ 4 mW stereo playback power consumption
mixer path
■
DAC digital filters with audio and voice mode
options, five-band equalizer and five
■
Ability to run the ADCs at a different sample
rate to the DACs on a single I²S interface
programmable biquad stages
■ Digital tone generator with built-in support for
■ Dedicated low-latency digital sideband filter
DTMF
with three programmable biquad stages
■ System controller for simplified, pop-free start-
■ High performance microphone to ADC record ^{up and shutdown}
path with a 105 dB dynamic range
■ Phase-locked loop with sample rate tracking
■ 2.5 mW stereo record power consumption
supporting MCLK frequencies from 2 MHz to
54 MHz
■ ADC digital filters with audio and voice mode
options
■ Automatic tuning of on-chip reference
oscillator for clock-free operation in low-power
■ 500 µW always-on record mode with
modes
automatic level detection
■ 4-wire digital audio interface with support for
■ Hybrid analog / digital automatic level control
I²S, four-channel I²S, TDM and other audio
to dynamically control the record level
formats
■ Shutdown mode offering current consumption _{■ 2-wire I}²_{C compatible control interface with}
during standby of 2.5 µA
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-
low power mode
■ A high efficiency two-level, true-ground charge
pump for generating class-G headphone
■ Ability to differentiate between stereo and
supplies
mono headsets
■ Automatic detection of headset removal and
confirmation of headset insertion
■ Voice mode filtering up to 32 kHz
Applications
■ Wired headsets
■ Wired headphones
■ Audio accessories
■ Portable media players
■ Gaming console controllers
■ Tablets and eBooks
Datasheet
CFR0011-120-00
Revision 2.5
1 of 173
01 Sep 2016
© 2016 Dialog Semiconductor