ADAU1966 Datasheet, PDF (1/52 Pages) Analog Devices – 16-Channel High Performance

16-Channel High Performance
Differential Output, 192 kHz, 24-Bit DAC
ADAU1966
FEATURES
118 dB DAC dynamic range and SNR
−98 dB THD + N
Differential voltage DAC output
2.5 V digital and 3.3 V or 5 V analog and IO supplies
299 mW total (19 mW/channel) quiescent power at AVDD = 3.3 V
PLL generated or direct MCLK master clock
Low EMI design
Linear regulator driver to generate digital supply
Supports 24-bit and 32 kHz to 192 kHz sample rates
Low propagation 192 kHz sample rate mode
Log volume control with autoramp function
Temperature sensor with digital readout ±3°C accuracy
SPI and I²C controllable for flexibility
Software-controllable clickless mute
Software power-down
Right-justified, left-justified, I²S, and TDM modes
Master and slave modes with up to 16-channel input/output
80-lead LQFP package
Qualified for automotive applications
APPLICATIONS
Automotive audio systems
Home theater systems
Digital audio effects processors
GENERAL DESCRIPTION
The ADAU1966 is a high performance, single-chip DAC that
provides 16 digital-to-analog converters (DACs) with differen-
tial output using the Analog Devices, Inc., patented multibit
sigma-delta (Σ-Δ) architecture. An SPI/I²C port is included,
allowing a microcontroller to adjust volume and many other
parameters. The ADAU1966 operates from 2.5 V digital and
3.3 V or 5 V analog supplies. A linear regulator is included to
generate the digital supply voltage from the analog supply volt-
age. The ADAU1966 is available in an 80-lead LQFP package.
The ADAU1966 is designed for low EMI. This consideration is
apparent in both the system and circuit design architectures.
By using the on-board PLL to derive the internal master clock
from an external LRCLK, the ADAU1966 can eliminate the
need for a separate high frequency master clock and can be
used with or without a bit clock. The DACs are designed using
the latest Analog Devices continuous time architectures to
further minimize EMI. By using 2.5 V digital supplies, power
consumption is minimized, and the digital waveforms are a
smaller amplitude, further reducing emissions.
FUNCTIONAL BLOCK DIAGRAM
DIGITAL AUDIO
INPUT
DIFFERENTIAL
ANALOG
AUDIO
OUTPUTS
ADAU1966
DAC
DAC
DAC
DAC
DAC
DAC
DIGITAL
FILTER
AND
VOLUME
CONTROL
DAC
DAC
PRECISION
VOLTAGE
REFERENCE
SERIAL DATA PORT
SDATA
IN
SDATA
IN
CLOCKS
TIMING MANAGEMENT
AND CONTROL
(CLOCK AND PLL)
SPI/I²C
CONTROL PORT
DAC
DAC
DIGITAL
FILTER
AND
VOLUME
CONTROL
DAC
DAC
DAC
DAC
DAC
DAC
INTERNAL
TEMP
SENSOR
DIFFERENTIAL
ANALOG
AUDIO
OUTPUTS
CONTROL DATA
INPUT/OUTPUT
Figure 1.
Rev. 0
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