DESCRIPTION

· The TDA7427 is a PLL frequency synthesizer with an integrated IF counting system, designed for complete PLL radio tuning in conventional and high-speed RDS tuners.

FEATURES

· On-chip reference oscillator and programmable IF counter.
· VHF input and precounter for frequencies up to 290MHz, suitable for DAB applications.
· HF input for frequencies up to 64MHz, ideal for shortwave bands.
· In-lock detector for search/stop station functionality.
· Stand-by mode for reduced power consumption.
· High current source for a 0.5ms lock-in time.
· Digital port extension with two outputs for application flexibility.
· Fully programmable via I2C bus.

APPLICATIONS

· Suitable for use in AM/FM radio frequency synthesizers and IF counters in radio tuning systems.