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Sony Semiconductor Electronic Components Datasheet

CXA3275Q Datasheet

PLL/OSC/MIX IC for Digital Tuner

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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
IFVcc
Operating temperature
Topr
4.5 to 5.5
4.5 to 5.5
–40 to +80
V
V
°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


Sony Semiconductor Electronic Components Datasheet

CXA3275Q Datasheet

PLL/OSC/MIX IC for Digital Tuner

No Preview Available !

Block Diagram and Pin Configuration
CXA3275Q
30 29 28 27 26 25 24 23 22 21
PLLVcc 31
CP 32
VLMIX
VHMIX
UMIX
20 UIN2
19 Vcc
VT 33
18 MIXOUT1
XI 34
17 MIXOUT2
XO 35
PLLGND 36
LOCK 37
SDA 38
SCL 39
CE 40
Ref
OSC
Charge
Pump
Band
SW
Ref
Phase
Program
Div. Det
Div.
Bus
Interface
Lock
Det
IF Amp
VLOSC
VHOSC
16 GND
15 IFIN1
14 IFIN2
13 RFGND
12 UOSCB1
UOSC 11 UOSCE1
1 2 3 4 5 6 7 8 9 10
–2–


Part Number CXA3275Q
Description PLL/OSC/MIX IC for Digital Tuner
Maker Sony Corporation
Total Page 22 Pages
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