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AD1955ARSZ Datasheet(PDF) 1 Page - Analog Devices |
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AD1955ARSZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page REV. 0 a 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. 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 © Analog Devices, Inc., 2002 AD1955 High Performance Multibit - DAC with SACD Playback FEATURES 5 V Power Supply Stereo Audio DAC System Accepts 16-/18-/20-/24-Bit Data Supports 24-Bit, 192 kHz Sample Rate PCM Audio Data Supports SACD Bit Stream and External Digital Filter Interface Accepts a Wide Range of PCM Sample Rates Including: 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, and 192 kHz Multibit Sigma-Delta Modulator with "Perfect Differen- tial Linearity Restoration" for Reduced Idle Tones and Noise Floor Data Directed Scrambling DAC––Low Sensitivity to Jitter Supports SACD Playback with "Bit Expansion" Filter Differential Current Output for Optimum Performance 8.64 mA p-p Differential Output 120 dB SNR/DNR (not muted) at 48 kHz Sample Rate (A-Weighted Stereo) 123 dB SNR/DNR (Mono) –110 dB THD + N 110 dB Stop-Band Attenuation with 0.0002 dB Pass-Band Ripple 8 Oversampling Digital Filter On-Chip Clickless Volume Control Supports SACD-Mute Pattern Detection Supports 64 fS/128 fS DSD SACD with Phase Mode Internal Digital Filter Pass-Through for External Filter Master Clock: 256 fS, 512 fS, 768 fS Hardware and Software Controllable Clickless Mute Serial (SPI) Control for Serial Mode, Number of Bits, Sample Rate, Volume, Mute, De-Emphasis, Mono Mode Digital De-Emphasis for 32 kHz, 44.1 kHz, and 48 kHz Sample Rates Flexible Serial Data Port with Right-Justified, Left- Justified, I 2S, and DSP Modes 28-Lead SSOP Plastic Package APPLICATIONS High End DVD Audio SACD CD Home Theater Systems Automotive Audio Systems Sampling Musical Keyboards Digital Mixing Consoles Digital Audio Effects Processors FUNCTIONAL BLOCK DIAGRAM AUTO-CLOCK DIVIDER SPI CONTROL MASTER CLOCK INPUT CONTROL DATA INPUT 3 DIGITAL SUPPLY DSD BITSTREAM INPUT MUX SERIAL DATA INTERFACE EXTERNAL FILTER I/F DIGITAL FILTER ENGINE S/H MULTIBIT - MODULATOR NOISE-SHAPED SCRAMBLING 16-/20-/24-BIT AUDIO DATA/ EXTERNAL DIGITAL FILTER INPUT 3/4 DSD FILTER RESET MUTE ANALOG SUPPLY ZERO FLAGS I-DAC L-CH R-CH DIFFERENTIAL CURRENT OUTPUT I-DAC VOLTAGE REFERENCE 4 PRODUCT OVERVIEW The AD1955 is a complete, high performance, single-chip, stereo digital audio playback system. It is comprised of a multibit sigma- delta modulator, high performance digital interpolation filters, and continuous-time differential current output DACs. Other features include an on-chip clickless stereo attenuator and mute capability, programmed through an SPI compatible serial control port. The AD1955 is fully compatible with all known DVD audio formats including 192 kHz as well as 96 kHz sample frequencies and 24 bits. It is also backward compatible by supporting 50 µs/ 15 µs digital de-emphasis intended for “redbook” compact discs, as well as de-emphasis at 32 kHz and 48 kHz sample rates. The AD1955 has a very flexible serial data input port that allows for glueless interconnection to a variety of ADCs, DSPs, SACD decoders, external digital filters, AES/EBU receivers, and (continued on page 12) |
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