Description

The CXA3275Q is a monolithic tuner IC for single conversion system digital broadcast tuners. This IC integrates three sets of local oscillator and mixer circuits (VHF Low Band/ VHF High Band/UHF Band), an IF amplifier and a tuning PLL onto a single chip, enabling further miniaturization of the tuner.

Features

• Balanced oscillators with low-phase noise and excellent oscillation stability (UHF: 4 pins, VHF: 2 pins)

• High linearity mixer and IF amplifier

• IF output switchable between balanced and unbalanced

• Low-phase noise PLL synthesizer (3-wire bus format)

• Reference frequency programmable in 4 bits

• On-chip high voltage drive transistor for charge pump

• On-chip 4-output band switch (PNP transistor on/off)

• 40-pin QFP package

Applications

Digital CATV tuners