D/A converter synthesises cable spectrum into single rf port
Analog Devices has announced a new 14bit D/A converter which it claims enables cable television and broadband operators to synthesise the entire cable spectrum up to 1GHz into a single rf port – while consuming a maximum power of 1.1W.
The AD9739A 2.5GSPS module features a wide bandwidth and dynamic range designed to enable cable operators to increase the quadrature amplitude modulation channel densities by 20 times compared to the densities found in other cable modems. It also includes the company's proprietary mix mode function, which supports the high fidelity digital synthesis of rf signals at up to 3.6GHz. The device has been designed for applications such as wireless communications equipment, instrumentation and defence electronics.
"The AD9739A converter allows cable head end equipment manufacturers to simplify and reduce their signal chain footprint while enabling operators to continue providing their customers with improved next generation services, such as interactive tv, high definition broadcasts and new specialty channels," said Chris Jacobs, product line director, high speed D/A converter group, Analog Devices.
