參數(shù)資料
型號(hào)： ADAU1702JSTZ
廠商： ANALOG DEVICES INC
元件分類： 消費(fèi)家電
英文描述： SigmaDSP 28-56-Bit Audio Processor with Two ADCs and Four DACs
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： ROHS COMPLIANT, PLASTIC, MS-026BBC, LQFP-48
文件頁(yè)數(shù)： 1/52頁(yè)
文件大?。?/td> 773K
代理商： ADAU1702JSTZ
SigmaDSP
28-/56-Bit Audio Processor
with Two ADCs and Four DACs
ADAU1702
FEATURES
28-/56-bit, 25 MIPS digital audio processor
Two ADCs: SNR of 100 dB, THD + N of 83 dB
Four 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 master clock from 64 × f
S
, 256 × f
S
,
384 × f
S
, or 512 × f
S
clocks
Flexible serial data input/output ports with I
2
S-compatible,
left-justified, right-justified, and TDM modes
Sampling rates up to 192 kHz supported
On-chip voltage regulator for compatibility with 3.3 V systems
48-lead, plastic LQFP
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
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
and can be used to compensate for real-world limitations of
speakers, amplifiers, and listening environments, providing a
dramatic improvements of 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
performance. 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
I
2
C bus or a 4-wire SPI port.
FUNCTIONAL BLOCK DIAGRAM
3
2
3
3
3
3
2
2
GPIO
INPUT/OUTPUT MATRIX
DIVDD
3.3V
DIGITAL
AVDD
ANALOG
PLL
FIPLL
CRYSTAL
0
A10ms DELAY MEMORY
2-ANALOG
INPUT
REG1.8V
SADC
ADFILTA/
MODE
SELECT
ICONTROL
SEAND
INPUT
D8-CH
AUX
ADC
RESET
SELF
DIGOR
GPIO
Figure 1.
AUOR
GPIO
DIGIOR
GPIO
I
2
WRIC/SPI
4
5
4
4
DAC
DAC
4-CHANNEL
FILTD/CM
PLL
OSCLOCK
ADAU1702
相關(guān)PDF資料
PDF描述
ADAU1702JSTZ-RL SigmaDSP 28-56-Bit Audio Processor with Two ADCs and Four DACs
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