Band Tuner (VHF-CATV-UHF) Description CXA3225N tuner monolithic w
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CXA3225N
Band Tuner (VHF-CATV-UHF)
Description CXA3225N tuner monolithic which integrates local oscillator mixer circuits band, local oscillator mixer circuits band, amplifier onto single chip. This adopts 20-pin SSOP package suitable miniaturizing voltage synthesizer tuner. Features power consumption typ.) Single power supply Superior cross modulation Balance-type oscillator with good oscillation stability pins) output selected from symmetrical asymmetrical Double-tuned filter connected output SSOP 20-pin package Applications tuners tuners CATV tuners Structure Bipolar silicon monolithic SSOP (Plastic)
-Absolute Maximum Ratings (Ta=25 Supply voltage VCC1 -0.3 +5.5 Storage temperature Tstg +150 Allowable power dissipation (when mounted printed circuit board) Operating Conditions Supply voltage Operating temperature
VCC1 Topr
4.75 5.30
Sony reserves right change products specifications without prior notice. This information does convey license implication otherwise under patents other right. Application circuits shown, any, typical examples illustrating operation devices. Sony cannot assume responsibility problems arising these circuits.
E98950-TE
CXA3225N
Block Diagram Configuration
BANDSW UOSCB2 UOSCE2 UOSCE1 UOSCB1 VOSCB2 VOSCB1 UHFIN2 VOSCC IFOUT1 IFOUT2
Bias
Buffer
Buffer
IFIN1
IFIN2
MIXOUT1
MIXOUT2
IFSW
VHFIN
UHFIN1
CXA3225N
Description Equivalent Circuit Symbol Typical voltage
Equivalent circuit
Description
IFIN1
amplifier input.
IFIN2
during reception MIXOUT1 during reception during reception MIXOUT2 during reception
Power supply.
Mixer outputs. These pins output with open collector, they must connected power supply load.
IFSW
(when open)
GND. Switching input ground symmetrical/ asymmetrical output. Asymmetrical output selected open state; symmetrical output grounding. When used asymmetrical output, ground this with capacitor.
during reception VHFIN during reception during reception during reception during reception during reception
IFSW
inputs. Input format asymmetrical input.
UHFIN1
UHFIN2
inputs. Input signal Pins symmetrically ground with capacitor input
CXA3225N
Symbol
VOSCB1
VOSCB2
VOSCC
UOSCB1
UOSCE1
UOSCE2
UOSCB2
Typical voltage during reception during reception during reception during reception during reception during reception during reception during reception during reception during reception during reception during reception during reception during reception
Equivalent circuit
Description
External resonance circuit connection oscillators. grounded with capacitor.
External resonance circuit connection oscillators.
BANDSW
100k
Band switching. operation more, operation less open state.
during symmetrical output IFOUT2 during asymmetrical output
output during symmetrical output. opposite phase signal output during symmetrical output. When asymmetrical output selected, signal output.
CXA3225N
Symbol
Typical voltage during symmetrical output
Equivalent circuit
Description
IFOUT1 during asymmetrical output
output.
CXA3225N
Electrical Characteristics Item Symbol ICCVU
Electrical Characteristics Measurement Circuit (Ta=25 VCC=5 Measurement conditions operation asymmetrical output input signal operation symmetrical output input signal operation asymmetrical output input signal operation symmetrical output input signal operation fRF=50 asymmetrical output operation fRF=430 asymmetrical output operation fRF=430 asymmetrical output operation fRF=850 asymmetrical output operation fRF=50 symmetrical output operation fRF=430 symmetrical output operation fRF=430 symmetrical output operation fRF=850 symmetrical output operation fRF=50 asymmetrical output operation fRF=430 asymmetrical output operation fRF=430 asymmetrical output operation fRF=850 asymmetrical output operation fD=50 fUD=±12 asymmetrical output operation fD=430 fUD=±12 asymmetrical output operation fD=430 fUD=±12 asymmetrical output operation fD=850 fUD=±12 asymmetrical output load, asymmetrical output operation fOSC=100 from seconds minutes after switch operation fOSC=470 from seconds minutes after switch operation fOSC=470 from seconds minutes after switch operation fOSC=895 from seconds minutes after switch Min. Typ. ±300 ±600 ±350 ±350 Max. Unit
ICCVB ICCUU ICCUB CG1U CG2U CG3U CG4U Conversion gain CG1B CG2B CG3B CG4B Circuit current Noise figure Maximum output power Pomax (sat) fsw1 fsw2 Switch drift fsw3 fsw4
cross modulation
Value measured with untuned input. meter direct-reading value (DSB measurement). Value with desired reception signal input level dBm, interference signal kHz/30 interference signal level where S/I=46 measured with spectrum analyzer. Value which measured load impedance compensated loss resistor connected Pins
CXA3225N
Item
Symbol fst1 fst2 fst3 fst4
Supply voltage drift
Band switching voltage
VSWV VSWU
Measurement conditions operation fOSC=100 when variation operation fOSC=470 when variation operation fOSC=470 when variation operation fOSC=895 when variation operation operation
Min.
Typ.
Max. ±200 ±250 ±150 ±150
Unit
CXA3225N
Description Operation (See Electrical Characteristics Measurement Circuit.) oscillator circuit This circuit differential amplifier-type oscillator circuit. output, input GND. Oscillation performed connecting resonance circuit including variable capacitance diode, coupled capacitance, inputting with feedback capacitance, applying positive feedback. Note that capacitance across Pins large, positive feedback applied parasitic capacitance causing undesired stray oscillation. resistor connected prevents parasitic oscillation. mixer circuit mixer circuit employs double balanced mixer with little local oscillation signal leakage. input format base input type. grounded signal input signal converted frequency signal supplied from oscillator then output Pins Pins open collectors, power must supplied externally. electric potential Pins this time must more. oscillator circuit This oscillator circuit designed that collector ground type Colpitts oscillators perform differential oscillation operation resonance circuit including variable capacitance diode. resonance capacitors which configure Colppits oscillator connected between Pins resonance circuit including variable capacitance diode connected between Pins mixer circuit This circuit employs double balanced mixer like mixer circuit. signal input Pins There input methods; symmetrical input where signal input Pins differentially other asymmetrical input where grounded capacitor signal input Pins mixer outputs. Pins open collectors, power must supplied externally. electric potential Pins this time must more. amplifier circuit signals frequency converted mixer output from Pins then they input input Pins external tuned circuit. tuned circuit, single-tuned circuit shown Electrical Characteristics Measurement Circuit double-tuned circuits connected. When used single-tuned filter, sure connect capacitor that voltage applied Pins signal amplified amplifier output with symmetrical asymmetrical output format. Selecting symmetrical asymmetrical performed Asymmetrical output when grounded capacitor; symmetrical output when directly grounded. During symmetrical output, filter direct connection possible during asymmetrical output. During asymmetrical output, output performed from during symmetrical output, output performed from Pins output impedance approximately switch circuit operation chosen applying voltage more operation open.
CXA3225N
Notes Operation Care should taken grounding, etc. when placing external parts operating frequencies high. sure design printed circuit board considering radiation heat placing pattern bottom Care should also taken prevent electrostatic damage because using high frequency process.
CXA3225N
Example Representative Characteristics
Supply voltage Circuit current (asymmetrical output)
Supply voltage Circuit current (symmetrical output) ICC-Circuit current [mA]
ICC-Circuit current [mA]
VCC-Supply voltage VCC-Supply voltage
Reception frequency Conversion gain (asymmetrical output) fIF=38MHz
Reception frequency Next adjacent cross modulation (untuned input, asymmetrical output)
CG-Conversion gain [dB] (Low) (High) CM-Cross modulation [dBµ]
fIF=38MHz fUD=fD+12MHz fUD=fD-12MHz (100kHz,
1000 Reception frequency [MHz]
Reception frequency [MHz]
-10-
CXA3225N
Reception frequency Noise figure (untuned input, asymmetrical output, display) fIF=38MHz
characteristics (untuned input, asymmetrical output)
(High) NF-Noise figure [dBm] (Low) output level [dBm]
fRF=100MHz (VHF) fRF=500MHz (UHF) both f=38MHz
Reception frequency [MHz]
input level [dBm]
characteristics (untuned input, symmetrical output)
Supply voltage fluctuation oscillation frequency VCC+5% VCC-5% (VCC=5V)
output level [dBm]
(Low) (High) drift [kHz]
fRF=100MHz (VHF) fRF=500MHz (UHF) both f=38MHz
-100
-200
-300
-400 Oscillation frequency [MHz] input level [dBm]
-11-
CXA3225N
Electrical Characteristics Measurement Circuit (asymmetrical output)
3.3µ 21.5t 0.5p (UK) 1T363 IFOUT1 IFOUT2 BANDSW UOSCB2 UOSCE2 UOSCE1 UOSCB1 VOSCC VOSCB2 VOSCB1 100p (RH) 1T362 100p 1T362 1T363 1.5t 0.5p (UK) 680p 6.5t
U/VSW
CXA3225N MIXOUT1 MIXOUT2
UHFIN1
5.5t
5.5t
3.3µ
-12-
UHFIN2
VHFIN
IFSW
IFIN1
IFIN2
CXA3225N
Electrical Characteristics Measurement Circuit (symmetrical output)
3.3µ 21.5t 0.5p (UK) 1T363 IFOUT1 IFOUT2 BANDSW UOSCB2 100p (RH) 1T362 100p UOSCE2 UOSCE1 UOSCB1 VOSCC VOSCB2 VOSCB1 1T362 1T363 1.5t 0.5p (UK) 680p 6.5t
U/VSW
CXA3225N MIXOUT1 MIXOUT2
UHFIN1
5.5t
5.5t
3.3µ
-13-
UHFIN2
VHFIN
IFSW
IFIN1
IFIN2
CXA3225N
Input Impedance
j100
50MHz 1000p
VHFin UHFin2
350MHz
-j25
-j100 500MHz
-j50
Input Impedance
j100
1000p
350MHz
800MHz -j25
-j100
-j50
-14-
UHFin1
IFSW
CXA3225N
Output Impedance (symmetrical output)
j100
45MHz 38MHz
-j25
-j100
-j50
Output Impedance (asymmetrical output)
j100
38MHz
45MHz
-j25
-j100
-j50
-15-
CXA3225N
Package Outline
Unit
20PIN SSOP (PLASTIC)
1.25
0.65 0.05 0.15 0.02
0.22 0.05
0.13
DETAIL NOTE: Dimension does include mold protrusion.
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SSOP-20P-L01 SSOP020-P-0044 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER PALLADIUM PLATING 42/COPPER ALLOY 0.1g
NOTE PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
-16-
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