AD1953 Analog Devices, AD1953 Datasheet
AD1953
Manufacturer Part Number
AD1953
Description
SigmaDSP Digital Audio Processor
Manufacturer
Analog Devices
Datasheet
1.AD1953.pdf
(36 pages)
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a
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. 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 companies.
FEATURES
5 V 3-Channel Audio DAC System
Digital Audio Output (2-Channel or 6-Channel
Accepts Sample Rates up to 48 kHz
7 Biquad Filter Sections per Channel
Dual Dynamic Processor with Arbitrary Input/Output
0 ms to 6 ms Variable Delay/Channel for Speaker Alignment
Stereo Spreading Algorithm for Phat Stereo™ Effect
Program RAM Allows Complete New Program Download
Parameter RAM Allows Complete Control of More Than
SPI Port Features Safe-Upload Mode for Transparent
2 Control Registers Allow Complete Control of Modes
Differential Output for Optimum Performance
112 dB Signal-to-Noise (Not Muted) at 48 kHz Sample
70 dB Stop-Band Attenuation
On-Chip Clickless Volume Control
Hardware and Software Controllable Clickless Mute
Digital De-emphasis Processing for 32 kHz, 44.1 kHz, 48 kHz
Flexible Serial Data Port with Right-Justified, Left-Justified,
Auxiliary Digital Input
Graphical Custom Programming Tools
48-Lead LQFP Plastic Package
CLOCK INPUTS
Packed Mode)
Curve and Adjustable Time Constants
via SPI Port
200 Parameters via SPI Port
Filter Updates
and Memory Transfers
Rate (A-Weighted Stereo)
Sample Rates
I
2
SERIAL DATA
S Compatible, and DSP Serial Port Modes
MASTER CLOCK
SERIAL DATA
MASTER
AUX SERIAL
DATA INPUT
INPUTS
SPI INPUT
SPI DATA
OUTPUT
OUTPUT
OUTPUT
3
3
3
3
3
MCLK
MUX
SERIAL CONTROL
AUDIO DATA
INTERFACE
MUX
GENERATOR
FUNCTIONAL BLOCK DIAGRAM
(256/512 f
MCLK
S
)
3.45 (DOUBLE PRECISION)
3.23 (SINGLE PRECISION)
PRODUCT OVERVIEW
The AD1953 is a complete 26-bit, single-chip, 3-channel digital
audio playback system with built-in DSP functionality for speaker
equalization, dual-band compression/limiting, delay compensa-
tion, and image enhancement. These algorithms can be used to
compensate for real-world limitations of speakers, amplifiers,
and listening environments, resulting in a dramatic improvement
of perceived audio quality.
The signal processing used in the AD1953 is comparable to that
found in high end studio equipment. Most of the processing is
done in full 48-bit double-precision mode, resulting in very good
low level signal performance and the absence of limit cycles or
idle tones. The compressor/limiter uses a sophisticated two-band
algorithm often found in high end broadcast compressors.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
RAM
APPLICATIONS
2.0/2.1 Channel Audio Systems (2 Main Channels
Multichannel Automotive Sound Systems
Multimedia Audio
Mini Component Stereo
Home Theater Systems (AC-3 Postprocessor)
Musical Instruments
In-Seat Sound Systems (Aircraft, Motor Coaches)
DATA FORMAT:
SigmaDSP
DSP CORE
Plus Subwoofer)
26
22
ROM
Signal Processing DAC
© 2003 Analog Devices, Inc. All rights reserved.
™
DATA CAPTURE
OUT/TDM OUT
AD1953
DAC – SW
3-Channel, 26-Bit
DAC – R
DAC – L
(continued on page 9)
AD1953
www.analog.com
DIGITAL
OUTPUT
ANALOG
OUTPUTS
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