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PDF ADAU1702 Data sheet ( Hoja de datos )
| Número de pieza | ADAU1702 | |
| Descripción | SigmaDSP 28-56-Bit Audio Processor | |
| Fabricantes | Analog Devices | |
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Data Sheet
SigmaDSP 28-/56-Bit Audio Processor
with Two ADCs and Four DACs
ADAU1702
FEATURES
28-/56-bit, 25 MIPS digital audio processor
2 ADCs: SNR of 100 dB, THD + N of −83 dB
4 DACs: SNR of 104 dB, THD + N of −90 dB
Complete standalone operation
Self-boot from serial EEPROM
Auxiliary ADC with 4-input mux for analog control
GPIOs for digital controls and outputs
Fully programmable with SigmaStudio graphical tool
28-bit × 28-bit multiplier with 56-bit accumulator for full
double precision processing
Clock oscillator for generating master clock from crystal
PLL for generating a master clock from 64 × fS, 256 × fS,
384 × fS, or 512 × fS clocks
Flexible serial data input/output ports with I2S-compatible,
left-justified, right-justified, and TDM modes
Sampling rates of up to 192 kHz are supported
On-chip voltage regulator for compatibility with 3.3 V systems
48-lead, plastic LQFP
APPLICATIONS
Multimedia speaker systems
MP3 player speaker docks
Automotive head units
Minicomponent stereos
Digital televisions
Studio monitors
Speaker crossovers
Musical instrument effects processors
In-seat sound systems (aircraft/motor coaches)
GENERAL DESCRIPTION
The ADAU1702 is a complete single-chip audio system with a
28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like
control interfaces. Signal processing includes equalization, cross-
over, bass enhancement, multiband dynamics processing, delay
compensation, speaker compensation, and stereo image widening.
This processing can be used to compensate for real-world
limitations of speakers, amplifiers, and listening environments,
providing dramatic improvements in perceived audio quality.
Its signal processing is comparable to that found in high end
studio equipment. Most processing is done in full 56-bit, double
precision mode, resulting in very good low level signal perfor-
mance. The ADAU1702 is a fully programmable DSP. The easy to
use SigmaStudio™ software allows the user to graphically configure
a custom signal processing flow using blocks such as biquad filters,
dynamics processors, level controls, and GPIO interface controls.
ADAU1702 programs can be loaded on power-up either from a
serial EEPROM through its own self-boot mechanism or from
an external microcontroller. On power-down, the current state
of the parameters can be written back to the EEPROM from the
ADAU1702 to be recalled the next time the program is run.
Two Σ-Δ ADCs and four Σ-Δ DACs provide a 98.5 dB analog
input to analog output dynamic. Each ADC has a THD + N of
−83 dB, and each DAC has a THD + N of −90 dB. Digital input
and output ports allow a glueless connection to additional
ADCs and DACs. The ADAU1702 communicates through an
I2C bus or a 4-wire SPI port.
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. 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 ©2007–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
ADAU1702
FUNCTIONAL BLOCK DIAGRAM
DIGITAL DIGITAL ANALOG ANALOG PLL PLL LOOP
VDD GROUND VDD GROUND MODE FILTER
CRYSTAL
3.3V
3
33
22
2
2-CHANNEL
ANALOG
INPUT
FILTA/
ADC_RES 2
1.8V
REGULATOR
STEREO
ADC
ADAU1702
PLL
28-/56-BIT, 25MIPS
AUDIO PROCESSOR CORE
10ms DELAY MEMORY
CLOCK
OSCILLATOR
DAC
DAC
2 FILTD/CM
4-CHANNEL
ANALOG
OUTPUT
RESET/
MODE
SELECT
CONTROL
INTERFACE
AND
SELFBOOT
8-CH
DIGITAL
INPUT
8-BIT
AUX
ADC
GPIO
8-CH
DIGITAL
OUTPUT
INPUT/OUTPUT MATRIX
5 333
RESET SELFBOOT I2C/SPI
DIGITAL IN AUX ADC DIGITAL OUT
AND WRITEBACK OR GPIO OR GPIO OR GPIO
Figure 1.
Data Sheet
Rev. D | Page 4 of 52
5 Page 
ADAU1702
ABSOLUTE MAXIMUM RATINGS
Table 7.
Parameter
DVDD to Ground
AVDD to Ground
IOVDD to Ground
Digital Inputs
Temperature Range
Storage
Operating (Ambient),
Functionally Guaranteed
Maximum Junction Temperature
Soldering (10 sec)
Rating
0 V to 2.2 V
0 V to 4.0 V
0 V to 4.0 V
DGND − 0.3 V, IOVDD + 0.3 V
−65°C to +150°C
0°C to +70°C
135°C
300°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
Data Sheet
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 8. Thermal Resistance
Package Type
48-Lead LQFP
θJA
72
θJC Unit
19.5 °C/W
ESD CAUTION
Rev. D | Page 10 of 52
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADAU1702.PDF ] | |
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