PLL/OSC/MIX IC for Digital Tuner

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

Structure

Bipolar silicon monolithic IC

Absolute Maximum Ratings (Ta = 25°C)

• Supply voltage

Vcc, PLLVcc

–0.3 to +6.0

V

IFVcc

–0.3 to +6.0

V

• Storage temperature

Tstg

–55 to +150

°C

• Allowable power dissipation

1.58

W

(when mounted on a printed circuit board)

Operating Conditions

• Supply voltage

Vcc, PLLVcc

4.5 to 5.5

V

IFVcc

4.5 to 5.5

V

• Operating temperature

Topr

–40 to +80

°C

– 1 –

E00461-PS

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by

any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the

operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

CXA3275Q

40 pin QFP (Plastic)

This IC has pins whose electrostatic discharge strength is weak as a high-frequency process is used for this IC.

Take care when handling the IC.