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