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AD1940 Datasheet(PDF) 1 Page - Analog Devices |
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AD1940 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 36 page  SigmaDSP Multichannel 28-Bit Audio Processor AD1940/AD1941 Rev. B 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. Specifications subject to change without notice. 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 owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113©2004–2010 Analog Devices, Inc. All rights reserved. FEATURES 16-channel digital audio processor Accepts sample rates up to 192 kHz 28-bit × 28-bit multiplier with full 56-bit accumulator Fully programmable program RAM for custom program download Parameter RAM allows complete control of 1,024 parameters Control port features safeload for transparent parameter updates and complete mode and memory transfer control Target/slew RAM for click-free volume control and dynamic parameter updates Double precision mode for full 56-bit processing PLL for generating MCLK from 64 × fS, 256 × fS, 384 × fS, or 512 × fS clocks Hardware-accelerated DSP core 21 kB (6,144 words) data memory for up to 128 ms of audio delay at fs = 48 kHz Flexible serial data port with I2S-compatible, left-justified, and right-justified serial port modes 8- and 16-channel TDM input/output modes On-chip voltage regulator for compatibility with 3.3 V and 5 V systems Programmable low power mode Fast start-up and boot time from power-on or reset 48-lead LQFP plastic package APPLICATIONS Automotive sound systems Digital televisions Home theater systems (Dolby digital/DTS postprocessor) Multichannel audio systems Mini-component stereos Multimedia audio Digital speaker crossover Musical instruments In-seat sound systems (aircrafts/motor coaches) FUNCTIONAL BLOCK DIAGRAM VOLTAGE REGULATOR AD1940/AD1941 28 × 28 DSP CORE DATA FORMAT: PLL SERIAL CONTROL INTERFACE SERIAL DATA/ TDM INPUTS MASTER CLOCK INPUT SPI/I2C I/O RAM ROM SERIAL DATA/ TDM OUTPUTS 2 4 4 2 2 5.23 (SINGLE PRECISION) 10.46 (DOUBLE PRECISION) Figure 1. GENERAL DESCRIPTION The AD1940/AD1941 are a complete 28-bit, single-chip, multi- channel audio SigmaDSP ™ for equalization, multiband dynamic processing, delay compensation, speaker compensation, and image enhancement. These algorithms can be used to compen- sate for the real world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality. The signal processing used in the AD1940/AD1941 is comparable to that found in high end studio equipment. Most of the processing is done in full, 56-bit double-precision mode, resulting in very good, low level signal performance and the absence of limit cycles or idle tones. The dynamics processor uses a sophisticated, multiple-breakpoint algorithm often found in high end broadcast compressors. The AD1940/AD1941 are a fully programmable DSP. Easy to use software allows the user to graphically configure a custom signal processing flow using blocks such as biquad filters, dyna- mics processors, and surround sound processors. An extensive control port allows click-free parameter updates, along with readback capability from any point in the algorithm flow. The AD1940/AD1941’s digital input and output ports allow a glueless connection to ADCs and DACs by multiple, 2-channel serial data streams or TDM data streams. When in TDM mode, the AD1940/AD1941 can input 8 or 16 channels of serial data, and can output 8 or 16 channels of serial data. The input and output port configurations can be individually set. The AD1940 is controlled by a 4-wire SPI ® port; the AD1941 is controlled by a 2-wire I2C ® bus. Other than the control interface, the functions of the two parts are identical. |
Número de pieza similar - AD1940_15 |
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