DA7212
Stereo CODEC with enhanced automatic level controller
and 1.2W speaker driver
DA7212 is a high performance, low-power audio codec with
an enhanced hybrid ALC and a powerful speaker driver
targeting portable and embedded applications.
A key benefit of the DA7212 is that it operates from a single
supply and has an internal LDO that can be used to optimise
power consumption.
The audio front-end simultaneously supports stereo auxiliary
line inputs plus analogue and digital microphones with two
independent microphone biases. These inputs can be mixed into
the input and/or output mixer paths.
34 ball WL_CSP Package, 0.5mm pitch
The audio/voice capture path also integrates an enhanced ALC and noise gate function to ensure
the dynamic range of the stereo ADCs is maximised. Comprehensive analogue mixing and bypass
paths to the output drivers are available.
The playback path delivers 98dB into 16Ω stereo headphones whilst only consuming 6.9mW (under
JEITA conditions). The headphone driver is true-ground with built-in charge pump. A dedicated
mono speaker channel is available that can deliver 1.2W into 8Ω mini-speaker when supplied from
5.0V.
All High pass channel filtering is performed digitally. Other digital functions include programmable
5-band EQ, beep generator and wind noise filter.
The codec supports both master and slave mode operation using the internal PLL which may
be bypassed if not required. The low power fractional PLL has been optimised to support a wide
range of sample and reference clock frequencies. Internal suppression circuits help maintain audio
synchronisation in the presence of system noise on the external clock.
Digital audio transfer to and from the external processor is available via bidirectional I2S interface
which supports all common sample rates.
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Features
►
High performance 24-bit audio codec in
7.5mm2 footprint
►
Ultra low power consumption. Stereo
Playback: 6 .9mW, Stereo Record: 2.0mW
@1.8V
►
Supports upto four analogue microphones
with two switchable low noise microphone bias
outputs
►
Digital microphone interface supporting single
channel or dual channel options
►
Stereo auxiliary input channel
►
Flexible analogue and digital mixing paths
►
DSP for ALC, 5-band EQ, noise gate, beep
generator
►
System controller for pop/click free operation
and easy setup
►
Bidirectional I2S with sample-rate tracking
►
Mono lineout/mini Speaker driver: 400mW into
8Ω @ 3.0 V with pop/click suppression
– 65mW @ 1.2V, THD < 1%, R = 8Ω
– 80mW @ 1.5V, THD < 1%, R = 8Ω
– 350mW @ 3.0V, THD < 1%, R = 8Ω
– 1.2W @ 5.0V, THD < 10%, R = 8Ω
►
Integrated PLL supports common audio
sample rates between 8-96kHz from 2-54MHz
reference clock
►
Wide supply range (1.7V to 2.5V)
Applications
►
►
►
►
►
Personal Media Players
Audio headphone/headsets
Wearables
Embedded applications
Arduino compatible development systems
ALC & Noise Gate Timing
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Features highlights
►
Stereo Playback/Record: 6.9mW & 2.0mW @
1.8V
►
Hybrid Digital/Analogue ALC offering faster
reaction times and finer gain resolution
►
Built-in beep generator that outputs all DTMF
keypad tones
►
5-band EQ
Board Area highlights
►
7.5mm2 package footprint enabling PCB
space savings in area constrained applications
►
Capless headphone driver eliminates large AC
coupling capacitors
►
Optimised ball-out conducive for low cost PCB
manufacturing
Block Diagram
(2x
Digital Mics)
Mic 1
DA7212
Mic 2
L Headphone
Class G
Mic 3
Mic 4
2 ch
ADC
Mixer
Digital Mix & Route
Wind Noise Filters
Automatic Level Control
5 Band Equalizer
Volume Control
Beep Generator
Noise Gate
2-ch
DAC
R Headphone
Class G
Speaker
Aux L
Aux R
I
2
C
I
2
S
PLL
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).
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