The MAX3570/MAX3571/MAX3573 low-cost, broadband, dual-conversion tuner ICs are designed for use in digital television receivers. Each IC integrates all necessary RF functions, including an integrated HI-IF filter, fully integrated VCOs, and an integrated IF VGA. The operating frequency range extends from 50MHz to 878MHz while providing over 60dB RF/IF gain-control range. The MAX3570/MAX3571 have an IF frequency centered at 44MHz, while the MAX3573 has an IF output centered at 36MHz. These devices include a variable-gain front-end, achieving an overall 8dB noise figure. A dual synthesizer generates both local oscillator (LO) frequencies, providing superior phase noise performance of -86dBc/Hz at 10kHz. The integrated HI-IF filter achieves 55dBc (typ) of image rejection. Only an IF SAW filter, passive loop filters, and a crystal are needed to complete a single-chip tuner. Device programming and configuration are accomplished with a 3-wire serial interface for the MAX3570, and with a 2-wire serial interface for the MAX3571/MAX3573.