DA7212 Datasheet, PDF (27/129 Pages) Dialog Semiconductor – Ultra-low power stereo codec

DA7212
Ultra-low power stereo codec
Company confidential
13 Functional description
13.1 General description
DA7212 is an ultra-low-power audio CODEC with true ground headphone drivers, mixing capability,
and digital audio enhancement. It offers Hi-Fi audio quality with class-leading power consumption for
portable media and embedded applications.
Featuring a high efficiency headphone amplifier and minimum supply voltage of 1.6 V, the ultra-low
3.1 mW quiescent power consumption extends music playback time for battery-operated equipment.
Control and data interfaces are supplied from a dedicated VDD_IO rail. For compatibility with higher
I/O levels, an extended voltage range up to 3.6 V can be selected.
The integrated PLL uses a fractional-N architecture that supports frequencies from 2 MHz to 50 MHz.
Standard mobile phone/USB system clock frequencies are supported, and audio data
synchronisation is supported even when no master clock is available.
The DA7212 has a stereo pair of single-ended line inputs as well as two microphone inputs, each of
which can be configured as single-ended or differential. Both line and microphone signals can be
routed to the ADC or directly to the output mixers via a bypass path. In addition, the DA7212
supports both single and dual-channel digital microphone inputs by routing the digital signals directly
to the ADC digital filters.
Input and output mixers with stereo-to-mono conversion also support mono configurations such as
single speaker outputs.
Three output drivers are available in the output stage of the DA7212 . A stereo true-ground amplifier
directly drives standard 3-wire 16 ohm headphones while a differential mono speaker amplifer is
capable of driving 1.2 W into 8 ohms.
Audio enhancement functions are performed digitally including programmable high-pass filtering, 5-
band EQ, noise-gate and an AGC with configurable attack and decay parameters.
The multislot I2S/PCM Digital Audio Interface (DAI) supports all common sample rates between
8 kHz and 96 kHz in master or slave modes.
The CODEC register space can be accessed via the I2C interface of DA7212 on the default 7-bit
address 0x1A.
DA7212 implements a unique Smart Controller that enables easy configuration of the Codec for
different application scenarios, thereby reducing the number of register writes needed for each case.
The Smart Controller runs automatically once enabled, and is optimised to allow pop-free and
click-free power-up and power-down operation.
Datasheet
Revision 3c
27 of 129
24-Nov-2015
© 2015 Dialog Semiconductor