Low-cost satellite TV tuner suits DVB-S, free-to-air apps

Maxim Integrated Products has introduced the MAX2120, a low-cost, zero-IF, direct-conversion tuner for satellite TVs. This tuner receives QPSK signals in the 925MHz to 2,150MHz range and downconverts them to baseband for demodulation. Its low 8dB noise figure eliminates the need for an external LNA, while its VCO autotuner function ensures ease of use. The MAX2120 is suitable for DVB-S and free-to-air applications in which low cost and ease of use are key requirements.

The MAX2120 operates from a single 3.3V supply and consumes only 330mW. It is designed to function using a low-cost 4MHz crystal, but an internal reference divider allows the user to select any crystal in the 4MHz to 8MHz range.

Fully specified over the 0 to 70°C commercial temperature range, the MAX2120 is available in a 5mm x 5mm 28-pin TQFN package. Prices start at $3.50 for at least 1,000 pieces, FOB USA. Evaluation kits and reference designs are available to speed designs.