Maxim Integrated Products has a zero-IF (ZIF) tuner for UHF-band MMDS applications. The device will receive QPSK signals in the 470MHz to 1000MHz range and then downconverts them to baseband for demodulation.

Specifically designed for China's UHF-band MMDS systems, the MAX2117 is compatible with most DVB-S demodulators.

A low 8dB (typ) noise figure, combined with a better than 25dB (typ.) adjacent-channel protection ratio (ACPR), makes this device ideal for MMDS applications.

The device operates from a single, 3.3V +/-5 per cent supply and consumes 330mW.

Though it has been designed to operate with a low-cost 4MHz crystal, an internal reference divider allows the user to select any crystal in the 4MHz to 8MHz range.

The MAX2117 is available in a 5x5mm, 28-pin TQFN package.