DA7211
Ultra low power 1.8V stereo audio codec with True-GND
headphone driver
The DA7211 is a high denition audio codec in a 3x3mm
footprint with integrated true-ground capless headphone
driver suitable for a variety of low power, digital portable
audio products.
Featuring a high eciency but powerful 40mW/channel
headphone amplier the device may be operated from a single
1.8V supply to simplify interfacing to digital processors. Total
device consumption is only 2.5mW which helps extend music
playback time for battery operated
equipment. The fully integrated fractional PLL has been power-
optimised designed to support a wide range of input and output
frequencies.
Internal suppression circuits help maintain audio
synchronisation in the presence of system noise on the
external clock.
Available in 3x3mm WL-CSP36, 0.5mm ball
pitch
Six analogue input pins allow multiple audio sources to be internally mixed, eliminating the need for
external switches. Both single-ended and fully-dierential line and microphone inputs are supported
with built-in variable gain ampliers to optimize dynamic range prior to digitisation. This provides
hardware support for ambient noise cancellation.
DA7211 provides two volume controlled dierential/single-ended stereo line out drivers and ground
centered stereo ampliers to directly drive standard 3-wire 16ohm headphones. For example the dc-
coupled, dedicated pop-free drivers may be connected to stereo headphones, stereo
speaker or mono line out, simultaneously and without external switches.
All ltering functions are performed digitally including 5-band EQ and a digital input AGC with
programmable attack and decay parameters. A congurable signal processing engine allows various
audio enhancements and eects i.e. acoustic ltering, transducer equalisation, wind noise
suppression and 3D sound.
The multi-slot I2S/PCM interface supports all common sample rates between 8-96kHz in master or
slave mode operation.
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Features
►
High performance audio codec with integrated
PLL
►
True-GND capless Class G 40mW headphone
driver with integrated charge pump
►
Single supply operation: 1.8 – 2.5V
►
Flexible clocking capability to minimise master
clock circuit board routing
►
Pop & Click suppression circuitry
►
Multi mode audio routing, mixing & volume
control
►
DSP 5 Band EQ, Input ALC, programmable
noise and acoustic enhancement filters
►
2-wire software control
Key Parameters
►
Stereo Playback/Record: 2.5mW & 3.5mW @
1.8V (into stereo headphone load including PLL
consumption)
►
Audio performance@ 2.5V
– DAC: 100dB/-85db THD
– ADC: 96db SNR/-89dB THD
►
Sample rates up to 96kHz supported via multi-
slot I2S/PCM interface
►
Stereo fully-differential microphone amplifiers
with 5uV input noise and bias
Power Saving Highlights
►
Low power Multi-bit DAC/ADC
►
Stereo Playback/Record: 2.5mW & 3.5mW @
1.8V
►
Class G Headphone driver
►
1.8V operation from external DC/DC
Board Area highlights
►
Small 3x3mm footprint
►
Capless headphone driver eliminates
►
Large AC coupling capacitors
Audio Performance highlights
►
24bit/96kHz Max Sample rate
►
Stereo 5uV balanced Microphone amplifiers
and low noise bias
►
Low distortion differential outputs 40mW 16Ω
headphone driver
Digital Processing highlights
►
5-band EQ
►
Independent volume control
►
Fully digital ALC
►
Programmable acoustic filters for audio
enhancements and 3D effects
►
Wind Noise Suppression
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Block Diagram
DA7211
L Headphone
Class G
Mic 1
Mic 2
2 ch
ADC
Line
Stereo
DIGITAL FILTERS
Acoustic Filtering,
Wind/Zoom
Noise Suppresssion,
5 Band Equalizer,
Automatic Gain Control
R Headphone
Class G
2 ch
DAC
Line Out
Line Out
I
2
C
I
2
S
PLL
Target Applications
►
Personal Media Players
►
Portable Consumer Devices, such as Digital
Radio
►
Music Handsets
►
Personal Navigation Devices
Dialog Semiconductor Worldwide Sales Offices
-
www.dialog-semiconductor.com
United Kingdom
Phone: +44 1793 757700
Germany
Phone: +49 7021 805-0
The Netherlands
Phone: +31 73 640 88 22
North America
Phone: +1 408 845 8500
Japan
Phone: +81 3 5425 4567
Taiwan
Phone: +886 281 786 222
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
This publication provides outline information only, which unless agreed by Dialog Semiconductor may not
be used, applied or reproduced for any purpose, or be regarded as a representation relating to products.
Please refer to Dialog standard supply terms on the company website (www.dialog-semiconductor.com).
© Dialog Semiconductor 2015. All rights reserved. 0415XXX
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