Satellite Tuner Device Includes On-Chip VCOs

Claimed as the industry's most highly integrated zero IF tuners for satellite set-top boxes, the MAX2116 and MAX2118 comprise a complete satellite receiver front-end, requiring only a few external passive components to complete the design. Targeted for use with most satellite demodulators, the devices include fully integrated VCOs. Operation is guaranteed over the full frequency range of 950 to 2,150 MHz. The MAX2116 has single-ended I and Q outputs, while the MAX2118 has differential outputs. Both are controlled by a 2-wire command interface. The devices eliminate the need for a 30V regulator, varactors and discrete inductors and capacitors and are said to offer distinct advantages over satellite set-top box designs that use external VCO tank circuits--namely, they save board space and cost and eliminate the difficult tank circuit design task. More importantly, the high level of integration of the MAX2116 and MAX2118 makes it possible to place the tuner directly on the main board, eliminating the need for costly tuner modules. According to the company, the on-chip architecture offers guaranteed DSS- and DVB-compatible performance while minimizing the RF engineering support needed in production. The devices are housed in a 6 mm x 6 mm, 40-pin QFN package and operate from a 5V supply over a 0°C to +85°C temperature range. Prices start at $4.98 each/1,000. Evaluation kits are available. MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.