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AD1954YSTZ 数据表(PDF) 1 Page - Analog Devices |
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AD1954YSTZ 数据表(HTML) 1 Page - Analog Devices |
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1 / 36 page  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 other- wise 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 © 2003 Analog Devices, Inc. All rights reserved. AD1954 SigmaDSP™3-Channel, 26-Bit Signal Processing DAC FEATURES 5 V 3-Channel Audio DAC System Accepts Sample Rates up to 48 kHz 7 Biquad Filter Sections per Channel Dual Dynamic Processor with Arbitrary Input/Output Curve and Adjustable Time Constants 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 via SPI Port Parameter RAM Allows Complete Control of More Than 200 Parameters via SPI Port SPI Port Features Safe-Upload Mode for Transparent Filter Updates 2 Control Registers Allow Complete Control of Modes and Memory Transfers Differential Output for Optimum Performance 112 dB Signal-to-Noise (Not Muted) at 48 kHz Sample Rate (A-Weighted Stereo) 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, and 48 kHz Sample Rates Flexible Serial Data Port with Right-Justified, Left-Justified, I2S Compatible, and DSP Serial Port Modes Auxiliary Digital Input FUNCTIONAL BLOCK DIAGRAM SERIAL CONTROL INTERFACE MCLK MUX MCLK GENERATOR (256fS/512fS) DAC – L DAC – R DAC – SW DATA CAPTURE OUT AUDIO DATA MUX 26 22 DSP CORE DATA FORMAT: 3.23 (SINGLE PRECISION) 3.45 (DOUBLE PRECISION) RAM ROM 3 3 3 3 3 ANALOG OUTPUTS AD1954 MASTER CLOCK OUTPUT SERIAL DATA INPUTS MASTER CLOCK INPUTS SERIAL DATA OUTPUT SPI INPUT SPI DATA OUTPUT AUX SERIAL DATA INPUT DIGITAL OUTPUT Graphical Custom Programming Tools 44-Lead MQFP or 48-Lead LQFP Plastic Package APPLICATIONS 2.0/2.1 Channel Audio Systems (Two Main Channels plus Subwoofer) Multimedia Audio Automotive Sound Systems Minicomponent Stereo Home Theater Systems (AC-3 Postprocessor) Musical Instruments In-Seat Sound Systems (Aircraft, Motor Coaches) 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. 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. (Continued on 9) REV. A |
类似零件编号 - AD1954YSTZ |
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类似说明 - AD1954YSTZ |
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