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.
32 ball WLCSP package, 0.5 mm
pitch
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
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►
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
I
2
S, four-channel I
2
S, TDM and other audio
formats
►
2-wire I
2
C 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
►
Gaming Console Controller
►
Audio Accessories
►
Portable Media Player
►
Tablet & ebooks
Block Diagram
DA7218
(2X Digital Mics)
Mic 1
Digital Filters
Volume Control
5 Band Equalizer
Automatic Level Control
Sidetone Filtering
Programmable Biquad
Filtering
Dynamic Range Extension
Headphone Detection
Tone Generator
Mic 2
Mic 3
2 ch
ADC
2 ch
DAC
L Headphone
Class G
R Headphone
Class G
Mic 4
(2X Digital Mics)
I
2
C
I
2
S
PLL
Feature highlights
►
Superior hi-fidelity audio performance for
immersive record and playback
►
Sub 500 μW always-on power extends battery
life for audio activity detection
►
Flexible programming filtering (sideband,
voice) enhances voice and audio playback
►
Mixed sample rate support for wideband
applications
►
Supports the latest generation of low power
analog and digital microphones
►
Small package footprint with an optimized ball-
out conducive to low cost PCB manufacturing
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Audio System diagram
Dialog Semiconductor Worldwide Sales Offices
-
www.dialog-semiconductor.com
United Kingdom
Phone: +44 1793 757700
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Phone: +49 7021 805-0
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Singapore
Phone: +65 648 499 29
Hong Kong
Phone: +852 3769 5200
email: info@diasemi.com
Korea
Phone: +82 2 3469 8200
China (Shenzhen)
Phone: +86 755 2981 3669
China (Shanghai)
Phone: +86 21 5424 9058
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