Features: Universal Low Cost Solution for HFC Network
Return-Channel TX Function: 5 MHz42 MHz/5 MHz65 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
63 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 PackagingApplicationHFC Data, Telephony and Video Modems
Wireless LANPinout
SpecificationsMaximum Junction Temperature . . . . . . . . . . . . . . . +150
VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6 V
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . .0.7 V to +VS
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . 5 mA
Storage Temperature . . . . . . . . . . . . . . . . 65 to +150
Operating Temperature . . . . . . . . . . . . . . . 40 to +85
Lead Temperature (10 sec Soldering) . . . . . . . . . . . +300
MQFP JA Thermal Impedance . . . . . . . . . . . . . . . . . 36 /WDescriptionThe 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 andprovides 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.
AD9853 Data Sheet
