DS856 is a high-speed Direct Digital Synthesizer (DDS) with a frequency tuning resolution of 32 bits, ROM phase resolution of 13-bit and a DAC amplitude resolution of 11 bits. Sine waves in the 1st Nyquist band can be generated up to near 1.6 GHz (at a 3.2-GHz clock rate). The initial phase can be reset to zero degrees to start with. The chip has a pair of complementary outputs with 50-? back terminations. The frequency of output waveforms can be controlled by thirty-two frequency control bits, Vi[0:31]. The DS856 accepts either differential clock inputs or a single- ended clock input and features 50-? on-chip back terminations with user-defined threshold. The frequency resolution bits accept LVTTL or CMOS input levels. Only a single –5V power supply is required.
Euvis Inc.中国办事处?
北京市海淀区知春路 118 号 3 层
Email: 8014367@163.com Web: www.zhongfa-ic.com
Tel.: +86-010-62610939 Fax: +86-010-62617378 QQ:247152003
"DS856 – High Speed 3GHz Direct Digital Synthesizer
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Euvis Inc.中国办事处?
北京市海淀区知春路 118 号 3 层
Email: 8014367@163.com Web: www.zhongfa-ic.com
Tel.: +86-010-62610939 Fax: +86-010-62617378 QQ:247152003
本部本提供美国euvis高端军用器件，型号为：DS856,"
Key Features
• 32-bit frequency tuning word & 13-bit phase resolution
• On chip DAC with 11 bit resolution
• Clock rate up to 3.2 GHz
• Sine wave generation up to 1.6 GHz
• Complementary analog waveform outputs with 50 ??
back terminations
• Worst SFDR > 50 dBc
• LVTTL/CMOS digital frequency word inputs
• Reset pin to initiate phase 0 starting state
• High speed strobe to update the frequency word and
DAC output frequency
• High speed strobe inputs to be controlled by micro- controller or DSP chips for real time chirping
• Frequency update rate as fast as 8 clock cycles
• 3.3 W power consumption with a single -5.0V power supply
Applications
• Radar design and testing
• Satellite communications
• VSAT
• Electronic warfare
• Wireless basestations
• RF signal source generation
• Instrumentation and semiconductor testers
• Advanced communication modulations
Description
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