Anadigics has developed what is claims is the most integrated single-package dual-conversion RF data tuner for cable access.
Dubbed the PicoTuner, the device eliminates the need for up to 50 off-chip components that are required by competitors' recently announced IC-based tuner designs, according to Dave Donovan, marketing director for cable and broadcast products at Anadigics. It is compliant with the Data Over Cable Service Interface Specification (DOCSIS).
The 22 by 22mm multichip module implements a complete RF tuner front end, and incorporates an upconverter, downconverter, dual synthesiser, SAW filter, varactor DC/DC converter, tuning circuitry, and al the necessary passive functions. The device is manufactured using GaAs and CMOS. The GaAs parts are made at Anadigics' newly expanded 6in fab. It is designed for mounting on the printed circuit board with standard surface-mount equipment.
"The PicoTuner will drastically simplify cable modem design. It is a low cost , single chip drop-in alternative to existing bulky single conversion tuner boxes and IC based double conversion alternatives", said Donovan.
Anadigics plans to extend the PicoTuner range with a version for video and Internet Protocol telephony available in 2001 and a part that will integrate the tuner with a transceiver also in the pipeline. The first part is designed to operate at 5V with a typical supply current of 350mA. However, next-generation parts will be rated for 3.3V, to reduce power consumption to below 750mW. They will be optimised for tuner platforms such as IP telephony, digital TV, and cable set top boxes.