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AD9853AS 数据表(PDF) 1 Page - Analog Devices |
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AD9853AS 数据表(HTML) 1 Page - Analog Devices |
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1 / 31 page  REV. C 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD9853 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 Programmable Digital QPSK/16-QAM Modulator FUNCTIONAL BLOCK DIAGRAM 10-BIT DAC SINE COSINE INTERPOLATION FILTER INV SYNC FILTER DDS PREAMBLE INSERTION RANDOMIZER CLOCK CONTROL FUNCTIONS 6 FIR FILTER FIR FILTER INTERPOLATION FILTER ENCODER: FSK QPSK DQPSK 16-QAM D16-QAM DATA DELAY & MUX XOR R-S FEC AD9853 10 10 AOUT GAIN CONTROL TO DRIVER AMP RESET TXENABLE FEC ENABLE/ DISABLE REF CLOCK IN SERIAL DATA IN SERIAL CONTROL BUS: 32-BIT OUTPUT FREQUENCY TUNING WORD INPUT DATA RATE/MODULATION FORMAT FEC/RANDOMIZER/PREAMBLE ENABLE/CONFIGURATION FIR FILTER COEFFICIENTS REF CLOCK MULTIPLIER ENABLE I/Q PHASE INVERT SLEEP MODE TO LP FILTER AND AD8320 CABLE DRIVER AMPLIFER FEATURES Universal Low Cost Solution for HFC Network Return-Channel TX Function: 5 MHz–42 MHz/ 5 MHz–65 MHz 165 MHz Internal Reference Clock Capability Includes Programmable Pulse-Shaping FIR Filters and Programmable Interpolating Filters FSK/QPSK/DQPSK/16-QAM/D16-QAM Modulation Formats 6 Internal Reference Clock Multiplier Integrated Reed-Solomon FEC Function Programmable Randomizer/Preamble Function Supports Interoperable Cable Modem Standards Internal SINx/x Compensation >50 dB SFDR @ 42 MHz Output Frequency (Single Tone) Controlled Burst Mode Operation +3.3 V to +5 V Single Supply Operation Low Power: 750 mW @ Full Clock Speed (3.3 V Supply) Space Saving Surface Mount Packaging APPLICATIONS HFC Data, Telephony and Video Modems Wireless LAN GENERAL DESCRIPTION The AD9853 integrates a high speed direct-digital synthesizer (DDS), a high performance, high speed digital-to-analog con- verter (DAC), digital filters and other DSP functions onto a single chip, to form a complete and flexible digital modulator device. The AD9853 is intended to function as a modulator in network applications such as interactive HFC, WLAN and MMDS, where cost, size, power dissipation, functional integra- tion and dynamic performance are critical attributes. The AD9853 is fabricated on an advanced CMOS process and it sets a new standard for CMOS digital modulator performance. The device is loaded with programmable functionality and provides a direct interface port to the AD8320, digitally- programmable cable driver amplifier. The AD9853/AD8320 chipset forms a highly integrated, low power, small footprint and cost-effective solution for the HFC return-path requirement and other more general purpose modulator applications. The AD9853 is available in a space saving surface mount pack- age and is specified to operate over the extended industrial temperature range of –40 °C to +85°C. |
类似零件编号 - AD9853AS |
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类似说明 - AD9853AS |
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