Part # AD1954 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD1954 SigmaDSP 3-Channel 26-Bit Signal Processing DAC Data Sheet (REV. A)

Part Details:

SigmaDSPTM 3-Channel, 26-Bit Signal Processing DAC AD1954 FEATURES Graphical Custom Programming Tools 5 V 3-Channel Audio DAC System 44-Lead MQFP or 48-Lead LQFP Plastic Package Accepts Sample Rates up to 48 kHz7 Biquad Filter Sections per Channel APPLICATIONS Dual Dynamic Processor with Arbitrary Input/Output Curve 2.0/2.1 Channel Audio Systems (Two Main Channels plus and Adjustable Time Constants Subwoofer) 0 ms to 6 ms Variable Delay/Channel for Speaker Alignment Multimedia Audio Stereo Spreading Algorithm for Phat StereoTM Effect Automotive Sound Systems Program RAM Allows Complete New Program Download Minicomponent Stereo via SPI Port Home Theater Systems (AC-3 Postprocessor) Parameter RAM Allows Complete Control of More Than Musical Instruments 200 Parameters via SPI Port In-Seat Sound Systems (Aircraft, Motor Coaches) SPI Port Features Safe-Upload Mode for Transparent Filter Updates GENERAL DESCRIPTION 2 Control Registers Allow Complete Control of Modes and The AD1954 is a complete 26-bit single-chip 3-channel digital Memory Transfers audio playback system with built-in DSP functionality for speaker Differential Output for Optimum Performance equalization, dual-band compression/limiting, delay compensa- 112 dB Signal-to-Noise (Not Muted) at 48 kHz Sample Rate tion, and image enhancement. These algorithms can be used to (A-Weighted Stereo) compensate for real-world limitations of speakers, amplifi ers, and 70 dB Stop-Band Attenuation listening environments, resulting in a dramatic improvement of On-Chip Clickless Volume Control perceived audio quality. Hardware and Software Controllable Clickless Mute The signal processing used in the AD1954 is comparable to that Digital De-emphasis Processing for 32 kHz, 44.1 kHz, and found in high-end studio equipment. Most of the processing is 48 kHz Sample Rates done in full 48-bit double-precision mode, resulting in very good Flexible Serial Data Port with Right-Justifi ed, Left-Justifi ed, low-level signal performance and the absence of limit cycles or I2S Compatible, and DSP Serial Port Modes idle tones. The compressor/limiter uses a sophisticated two-band Auxiliary Digital Input algorithm often found in high-end broadcast compressors. (Continued on 9)

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AD1954.pdf Datasheet