DOCSIS 3.0 compliant RF D/A konverter

Analog Devices nye 14-bit AD9129 og 11-bit AD9119 D/A konvertere kan syntisere det fulde kabelspektrum, hvilket reducerer antallet af nødvendige komponenter i kabel infrastruktur designs (in english).

Analog Devices has introduced two RF (radio frequency) D/A converters that are able to synthesise the entire downstream (transmit) cable spectrum from a single D/A converter port.

Supporting data rates up to 2.8 GSPS, the single-channel, 14-bit AD9129 and 11-bit AD9119 RF D/A converters allow cable operators to reduce the total system power and component count of CATV (CMTS)  infrastructure equipment, simplify system design, and lower total bill of material costs.

The new RF D/A converters support from one to as many as 158 CATV carriers and include an optional 2x interpolation filter that reduces output filtering complexity by effectively increasing the D/A converter update rate by a factor of two.

In its Mix-Mode super-Nyquist operation, the AD9129 can reconstruct spectrally-pure RF carriers in the 2nd and 3rd Nyquist zones, eliminating a mixing stage while still maintaining exceptional dynamic range at up to 4.2 GHz.

- The AD9129 RF D/A converter utilises ADI’s patented quad-switch architecture to synthesise the full DC-to-1.4 GHz baseband output spectrum, which will greatly simplify and improve downstream DOCSIS 3.0-compliant transmitter design, says Carlton Lane, marketing manager, High-speed D/A Converter group, Analog Devices.

- This D/A converter’s new level of performance and functionality enables cable infrastructure equipment manufacturers to implement the complete downstream signal chain in a smaller footprint, at one-third the power, and using fewer signal chain components. These are all important design considerations in today’s CMTS service environment.”

• Download data sheet, view product page, and request samples:  http://www.analog.com/AD9129 
http://www.analog.com/AD9119