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CXA3275Q

PLL/OSC/MIX IC for Digital Tuner

Sony Semiconductor 

PLL/OSC/MIX IC for Digital Tuner

CXA3275Q

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.

40 pin QFP (Plastic)

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

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

PD

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

Structure

Bipolar silicon monolithic IC

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.

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.

–1–

E00461-PS

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