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ADAU1979 Datenblatt(PDF) 1 Page - Analog Devices

Teilenummer ADAU1979
Bauteilbeschribung  Quad Analog-to-Digital Converter (ADC)
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Quad Analog-to-Digital Converter (ADC)
Data Sheet
ADAU1979
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
Four 4.5 V rms (typical) differential inputs
On-chip phase-locked loop (PLL) for master clock
Low electromagnetic interference (EMI) design
109 dB (typical) analog-to-digital converter (ADC) dynamic
range
Total harmonic distortion + noise (THD + N): −95 dB (typical)
Selectable digital high-pass filter
24-bit stereo ADC with 8 kHz to 192 kHz sample rates
Digital volume control with autoramp function
I2C/SPI controllable for flexibility
Software-controllable clickless mute
Software power-down
Right justified, left justified, I2S, and TDM modes
Master and slave operation modes
40-lead LFCSP package
Qualified for automotive applications
APPLICATIONS
Automotive audio systems
Active noise cancellation systems
GENERAL DESCRIPTION
The ADAU1979 incorporates four high performance, analog-to-
digital converters (ADCs) with 4.5 V rms capable ac-coupled
inputs. The ADCs use a multibit sigma-delta (Σ-Δ) architecture
with continuous time front end for low EMI. An I2C/serial
peripheral interface (SPI) control port is included that allows a
microcontroller to adjust volume and many other parameters.
The ADAU1979 uses only a single 3.3 V supply. The device
internally generates the required digital DVDD supply. The low
power architecture reduces the power consumption. The on-
chip PLL can derive the master clock from an external clock
input or frame clock (sample rate clock). When fed with the
frame clock, it eliminates the need for a separate high frequency
master clock in the system. The ADAU1979 is available in a
40-lead LFCSP package.
Note that throughout this data sheet, multifunction pins, such
as SCL/CCLK, are referred to either by the entire pin name or
by a single function of the pin, for example, CCLK, when only
that function is relevant.
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
AVDDx
BG
REF
PLL
AGNDx
DVDD
IOVDD
LRCLK
BCLK
SDATAOUT1
SDATAOUT2
3.3V TO 1.8V
REGULATOR
ADAU1979
SCL/CCLK
SDA/COUT
ADDR1/CIN
ADDR0/CLATCH
PD/RST
I2C/SPI
CONTROL
AGNDx
AGNDx
AIN1
AIN1
AIN2
AIN2
AIN3
AIN3
AIN4
AIN4
ADC
ADC
ADC
ADC
AVDDx


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