DA7217 Datasheet, PDF (1/171 Pages) Dialog Semiconductor – Ultra-Low Power Stereo Codec

DA7217
Ultra-Low Power Stereo Codec
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 ■ 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 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
■ The headphone amplifier can be run directly
from the supply, thus eliminating the need for
■ A high efficiency two-level, true-ground charge _{charge pump capacitors}
pump for generating class-G headphone
supplies
■ Voice mode filtering up to 32 kHz
Applications
■ Hearables
■ Wireless and wired headphones
■ Wireless and wired headsets
Datasheet
CFR0011-120-00
Revision 2.5
1 of 171
01 Sep 2016
© 2016 Dialog Semiconductor