cxa3235n

Manufacturer Part Numbercxa3235n
DescriptionAll Band Tv Tuner Ic With On-chip Pll - Sony Corporation
ManufacturerSony Electronics
cxa3235n datasheet
 


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All Band TV Tuner IC with On-chip PLL
Description
The CXA3235/3236N is a monolithic TV tuner IC
which integrates local oscillator and mixer circuits for
VHF band, local oscillator and mixer circuits for UHF
band, an IF amplifier and a tuning PLL onto a single
chip, enabling further miniaturization of the tuner.
The PLL on this IC supports the I
2
C bus format.
Features
• Low noise figure
• Low power consumption (5 V, 54 mA typ.)
• On-chip tuning PLL (I
C bus format)
2
• Selection of frequency steps 31.25 kHz, 50 kHz
and 62.5 kHz
• On-chip 4-output band switch
Applications
• TV tuners
• VCR tuners
• CATV tuners
Structure
Bipolar silicon monolithic IC
Note) Electrostatic discharge strength is weak, and care should be taken in handling this 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.
CXA3235/3236N
30 pin SSOP (Plastic)
Absolute Maximum Ratings (Ta = 25 °C)
• Supply voltage
V
1,V
CC
CC
V
3
CC
• Storage temperature
Tstg
• Allowable power dissipation
P
D
(when mounted on a substrate)
Operating Conditions
• Supply voltage V
1, V
CC
CC
V
3
CC
• Operating temperature
Topr
—1—
2
–0.3 to +5.5
V
–0.3 to +10.0
V
–55 to +150
°C
880
mW
2
4.75 to 5.30
V
4.75 to 9.45
V
–25 to +75
°C
E97943A81-TE

cxa3235n Summary of contents

  • Page 1

    All Band TV Tuner IC with On-chip PLL Description The CXA3235/3236N is a monolithic TV tuner IC which integrates local oscillator and mixer circuits for VHF band, local oscillator and mixer circuits for UHF band amplifier and a ...

  • Page 2

    Block Diagram and Pin Configuration 1 SCL BUS 2 SDA Receiver ADSW 3 4 FMT Band 5 BVL SW Driver 6 BVH BU 7 USW V.REG CC IF AMP 9 MIXout1 MIXout2 10 11 ...

  • Page 3

    Pin Description Pin Symbol Equivalent circuit No SCL SDA ADSW 4 FMT 30 5 BVL BVH MIXout1 10 ...

  • Page 4

    Pin Symbol Equivalent circuit No VHFin UHFin1 UHFin2 VOSC1 600 VOSC2 15p 17 GND 19 UOSCB1 UOSCE1 UOSCE2 ...

  • Page 5

    Pin Symbol Equivalent circuit No GND2 8 25 IFOUT 25 26 LOCK 27 CPE 28 CPO 60k 29 29 REFOSC Pin voltage (V) — — — — ...

  • Page 6

    Electrical Characteristics See the Electrical Characteristics Measurement Circuit. Circuit Current Item Symbol V Circuit current A AI CCV open during VHF operation V AI CCU open during UHF operation Circuit current OSC/MIX/IF Amplifier Block Item Symbol ...

  • Page 7

    Measured value for untuned inputs Noise figure is the direct-reading value of NF meter in DSB. Desired signal (f ) input level is –30 dBm. Undesired signal ( The measurement value is undesired signal level, it ...

  • Page 8

    Electrical Characteristics Measurement Circuit 8200p 47k 0.047µ LOCK IF OUT XTAL 4MHz 100p SCL SDA ADSW FMT BVL +30V 22k 33p +5V 47k 2SC2785 3.3µ 1n 2.5ø2.5t 0.5p 0.5p ...

  • Page 9

    Description of Functions The CXA3235/3236N is a terrestrial wave broadcast tuner IC which converts frequencies order to tune and detect only the desired reception frequency of VHF, CATV and UHF band signals. In addition to the mixer, ...

  • Page 10

    Description of Analog Block Operation VHF oscillator circuit • This circuit is a differential amplifier type oscillator circuit. Pin 18 is the output and Pin 16 is the input. Oscillation is performed by connecting an LC resonance circuit including a ...

  • Page 11

    Description of PLL Block The PLL on this IC supports the I Symbol Description ADSW Address selection SCL SCL input SDA SDA I/O 1) Mode Setting Method The modes for each frequency step are set according to the MS pin ...

  • Page 12

    ... The variable frequency division ranges of M and S are as follows, and are set as binary 1023 (32 M 511 for B-1 mode 3-1) The CXA3235N control format is as follows. 3-1-1 : B-0/B-1/B-2/B-3 Modes Write-mode : Slave Receiver MSB MODE bit7 Address byte 1 Divider byte 1 ...

  • Page 13

    ... The CXA3236N control format is as follows. The BU and FMT data order is switched for the CXA3235N. 3-2-1 : B-0/B-1/B-2/B-3 Modes Write-mode : Slave Receiver MSB MODE bit7 Address byte 1 Divider byte 1 0 Divider byte 2 M2 Control byte 1 Band SW byte Don’t care M9 is “0” for B-1 mode. ...

  • Page 14

    Reference Divider Frequency Division Ratio Table Don’t care 3-3) The read data format is as shown below. Read-mode : Slave Transmitter MODE bit7 Address byte 1 Status byte PR A ...

  • Page 15

    I C Bus Timing Chart 2 t WSTA SDA t SSTA SCL t HSTA START t =Start setup time SSTA t =Start waiting time WSTA t =Start hold time HSTA t =LOW clock pulse width LOW t =HIGH clock pulse ...

  • Page 16

    Circuit current vs. Supply voltage 4.7 4.8 4.9 5.0 5.1 5 Supply voltage [V] CC Band SW output voltage vs. Output current (BU, BVH, BVL) 9.2 9.0 V 3=9V CC 8.8 8.6 5.0 ...

  • Page 17

    Conversion gain vs. Reception frequency (Untuned input =45MHz UHF VHF (Low) VHF (High 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] Next adjacent cross ...

  • Page 18

    Tuning Response Time VHF (Low) 95MHz –90,0000ms –90,0000ms VHF (High) 395MHz T=70ms 10,0000ms 20.0ms/div UHF 413MHz UHF 847MHz T=70ms 10,0000ms 20.0ms/div —18— CXA3235/3236N 5.0V/div offset 10.0V 110,000ms 5.0V/div offset 10.0V 110,000ms ...

  • Page 19

    CENTER 45.0MHz RES BW 1.0kHz CENTER 45.0MHz RES BW 1.0kHz IF output spectrum RF input level : –40dBm VBW 10Hz IF output spectrum RF input level : –40dBm VBW 10Hz —19— CXA3235/3236N RL=0dBm 10dB/div VHF (Low) f =55MHz RF f ...

  • Page 20

    CENTER 45.0MHz RES BW 1.0kHz IF output spectrum RF input level : –40dBm VBW 10Hz —20— CXA3235/3236N RL=0dBm 10dB/div UHF (Low) f =800MHz RF f =845MHz LO SPAN 100.0kHz SWP 30.0s ...

  • Page 21

    VHF Input Impedance j25 0 –j25 UHF Input Impedance j25 0 –j25 j50 j100 50MHz 50 350MHz –j100 –j50 j50 j100 50 350MHz 800MHz –j100 –j50 —21— CXA3235/3236N 12 13 1000p S11 14 15 1000p S11 ...

  • Page 22

    IF output Impedance j25 0 –j25 j50 j100 45MHz 50 –j100 –j50 —22— CXA3235/3236N ...

  • Page 23

    Package Outline Unit : 0.1 0.22 – 0.05 NOTE: Dimension “ ” does not include mold protrusion. SONY CODE EIAJ CODE JEDEC CODE NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). ...