Datasheet > EVAL-AD1954EB

EVAL-AD1954EB

更新时间： 2024-11-24 12:54:07

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
36页	1377K
描述
SigmaDSPâ¢ 3-Channel, 26-Bit Signal Processing DAC

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EVAL-AD1954EB 数据手册

SigmaDSP^™

3-Channel, 26-Bit

Signal Processing DAC

AD1954

URES

Graphical Custom ProgrammingTools

5V 3-Channel Audio DAC System

44-Lead MQFP or 48-Lead LQFP Plastic Package

Accepts Sample Rates up to 48 kHz

7 Biquad Filter Sections per Channel

Dual Dynamic Processor with Arbitrary Input/Output Curve

and AdjustableTime Constants

0 ms to 6 msVariable Delay/Channel for Speaker Alignment

Stereo Spreading Algorithm for Phat Stereo™ Effect

Program RAM Allows Complete New Program Download

via SPI Port

APPLIC

IONS

2.0/2.1 Channel Audio Systems (Two Main Channels plus

Subwoofer)

Multimedia Audio

Automotive Sound Systems

Minicomponent Stereo

HomeTheater Systems (AC-3 Postprocessor)

Musical Instruments

In-Seat Sound Systems (Aircraft, Motor Coaches)

Parameter RAM Allows Complete Control of MoreThan

200 Parameters via SPI Port

SPI Port Features Safe-Upload Mode forTransparent Filter

Updates

2 Control Registers Allow Complete Control of Modes and

MemoryTransfers

Differential Output for Optimum Performance

112 dB Signal-to-Noise (Not Muted) at 48 kHz Sample Rate

(A-Weighted Stereo)

GENERAL DESCRIPTION

The AD1954 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.

70 dB Stop-Band Attenuation

On-Chip ClicklessVolume Control

The signal processing used in the AD1954 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.

Hardware and Software Controllable Clickless Mute

Digital De-emphasis Processing for 32 kHz, 44.1 kHz, and

48 kHz Sample Rates

Flexible Serial Data Port with Right-Justiﬁed, Left-Justiﬁed,

²S Compatible, and DSP Serial Port Modes

Auxiliary Digital Input

(

Continued on 9

)

FUNCTIONAL BLOCK DIAGRAM

SERIAL DATA

OUTPUT

AD1954

26  22

DSP CORE

AUDIO DATA

MUX

SERIAL DATA

INPUTS

DAC – L

DAC – R

DATA FORMAT:

3.23 (SINGLE PRECISION)

3.45 (DOUBLE PRECISION)

MASTER CLOCK

OUTPUT

ANALOG

OUTPUTS

MCLK

GENERATOR

MASTER

CLOCK INPUTS

MCLK

MUX

DAC – SW

(256f /512f )

AUX SERIAL

DATA INPUT

DATA CAPTURE

OUT

DIGITAL

OUTPUT

SPI DATA

OUTPUT

SERIAL CONTROL

INTERFACE

SPI INPUT

RAM

ROM

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed byAnalog 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 other-

wise under any patent or patent rights ofAnalog 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

Fax: 781/326-8703

www.analog.com

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