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CXA3125N
Band Tuner (VHF-CATV-UHF) availability this product, please contact sales office.
Description CXA3125N tuner which integrates local oscillator mixer circuits band, local oscillator mixer circuits band, amplifier onto single chip. This adopts 16-pin SSOP package suitable miniaturizing voltage synthesizer tuner. Features noise figure Superior cross modulation power consumption typ.) output selected from symmetrical asymmetrical SSOP 16-pin package Applications tuners tuners CATV tuners Structure Bipolar silicon monolithic SSOP (Plastic)
Absolute Maximum Ratings (Ta=25 Supply voltage -0.3 +5.5 Storage temperature Tstg +150 Allowable power dissipation (when mounted printed circuit board) Operating Conditions Supply voltage Operating temperature
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.
E97705A85-TE
CXA3125N
Block Diagram Configuration CXA3125N
UOSC2 UOSC1 VOSC2 VOSC1
IFout1
IFout2
IFSW
UHFOSC OUTPUT Buffer VHFOSC
VHFMIX Bias V.REG
UHFMIX
MIXout1
MIXout2
VHFin1
VHFin2
UHFin1
UHFin2
CXA3125N
Description Equivalent Circuit Symbol Typical voltage During reception During reception MIXout2 VHFin1 VHFin2 UHFin1 UHFin2 VOSC1
Equivalent circuit
Description Power supply.
MIXout1
Mixer outputs amplifier inputs. These pins output with open collector, they must connected power supply load.
GND.
inputs. Normally capacitor connected used input.
inputs. Symmetrical input Pins capacitor connected used input.
VOSC2
External resonance circuit connection oscillators.
CXA3125N
Symbol
Typical voltage
Equivalent circuit
Description Symmetrical/asymmetrical selection output. Asymmetrical output selected open state; symmetrical output, connecting GND. When used asymmetrical output, connect with capacitor.
IFSW
(when open)
UOSC1
External resonance circuit connection oscillators.
UOSC2
Band switching. operation when more voltage applied externally, operation when less voltage applied. outputs during symmetrical output. reverse phase signal output during symmetrical output. When asymmetrical output selected, signal output.
During symmetrical output IFout2 During asymmetrical output During symmetrical output IFout1 During asymmetrical output
outputs.
CXA3125N
Electrical Characteristics Item Symbol ICCVU
Electrical Characteristics Measurement Circuits (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=55 asymmetrical output operation fRF=360 asymmetrical output operation fRF=360 asymmetrical output operation fRF=800 asymmetrical output operation fRF=55 symmetrical output6 operation fRF=360 symmetrical output6 operation fRF=360 symmetrical output6 operation fRF=800 symmetrical output6 operation fRF=55 asymmetrical output operation fRF=360 asymmetrical output operation fRF=360 asymmetrical output operation fRF=800 asymmetrical output operation fD=55 fUD=±12 asymmetrical output operation fD=360 fUD=±12 asymmetrical output operation fD=360 fUD=±12 asymmetrical output operation fD=800 fUD=±12 asymmetrical output load, asymmetrical output operation operation operation operation operation operation operation operation operation operation fOSC=100 fOSC=405 fOSC=405 fOSC=845 fOSC=100 fOSC=405 fOSC=405 fOSC=845 Min. Typ. ±300 ±400 ±400 ±400 ±200 ±250 ±250 ±250 Max. 12.5 Unit
ICCVB ICCUU ICCUB CG1U CG2U CG3U CG4U Conversion gain CG1B CG2B CG3B CG4B Noise figure Circuit current Maximum output power Switch drift Pomax (sat) fsw1 fsw2 fsw3 fsw4 fst1 fst2 fst3 fst4 VSWV VSWU
cross modulation
drift
Band switch voltage
Input level dBm, Value measured with untuned input. Noise figure meter direct-reading value (DSB measurement). Value with desired reception signal input level dBm, interference signal interference signal level where S/I=46 measured with spectrum analyzer. Frequency variation from seconds minutes after switch Frequency variation when VCC=5 variation. Value which measured load impedance compensated loss resistor connected Pins
CXA3125N
Electrical Characteristics Measurement Circuit (asymmetrical output)
1.2k 3.3µ BAND 2.62.5t 1T363 0.5p 1T362 (UK) 1T363 0.5p 2.5t 6.5t
0.5p (UK)
1T363 (RH)
VOSC1
UOSC2
CXA3125N
MIXout1
MIXout2
UOSC1
VOSC2
IFout1
IFout2
IFSW
VHFin1
VHFin2
UHFin1
UHFin2
3.3µ
pentagonal coil t/4.5 without indication air-core coil diameter. These components value setting frequency variation range.
CXA3125N
Electrical Characteristics Measurement Circuit (symmetrical output)
1.2k 3.3µ BAND 2.62.5t 1T363 0.5p 1T362 (UK) 1T363 0.5p 2.5t 6.5t
0.5p (UK)
1T363 (RH)
VOSC1
UOSC2
CXA3125N
MIXout1
MIXout2
UOSC1
VOSC2
IFout1
IFout2
IFSW
VHFin1
VHFin2
UHFin1
UHFin2
3.3µ
pentagonal coil t/4.5 without indication air-core coil diameter. These components value setting frequency variation range.
CXA3125N
Description Operation (See Electrical Characteristics Measurement Circuit.) oscillator circuit This circuit differential amplifier type oscillator circuit. output input. Oscillation performed connecting resonance circuit including varicap coupled capacitance, inputting with feedback capacitance, applying positive feedback. Note that capacitance across Pins large, positive feedback applied parasitic capacitance causing undesired stray oscillation. mixer circuit mixer circuit employs double symmetrical mixer with little local oscillation signal leakage. signal input Pins During normal use, signal input while other connected GND. signal converted frequency signal supplied from oscillator then output Pins Pins open collectors, power must supplied externally. Connect through which configures external filter resistor. 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 varicap. Feedback capacitance built into resonance circuit including varicap connected between Pins coupled capacitance. mixer circuit This circuit employs double symmetrical mixer like mixer circuit. signal input Pins There symmetrical input differential from both edges secondary coil pre-stage double-tuned circuits, asymmetrical input with capacitor connected GND. Otherwise, conditions usage same those mixer circuit. amplifier circuit signals frequency converted mixer output from Pins same time coupled inside input amplifier. Single-tuned filters connected Pins order improve interference characteristics amplifier. signal amplified amplifier output with symmetrical asymmetrical output format. Selecting symmetrical asymmetrical performed Asymmetrical output when open state; symmetrical output when connected GND. During symmetrical output, filter direct connection possible during asymmetrical output, output stage drive capability increased drive load. During asymmetrical output, output performed from during symmetrical output, output performed from Pins output impedance approximately symmetrical output; asymmetrical output. When asymmetrical output selected, connect through capacitor. switch circuit operation chosen applying voltage more operation open.
CXA3125N
Notes Operation Care should taken grounding, etc. when placing external parts high operating frequencies present. pattern also serves heat dissipation pins, care should taken prevent heat problems. Care should also taken prevent electrostatic damage because using high frequency process.
CXA3125N
Example Representative Characteristics
Supply voltage Circuit current (for asymmetrical output) Reception frequency Conversion gain (for asymmetrical output)
Conversion gain [dB]
Circuit current [mA]
fIF=45MHz
Supply voltage
Reception frequency [MHz]
Reception frequency Noise figure (untuned input, asymmetrical output, display)
Reception frequency drift
Noise figure [dB]
fIF=45MHz
DRIFT [kHz]
-200
-400 Reception frequency [MHz] Reception frequency Next adjacent cross modulation (untuned input, asymmetrical output) 1000
Reception frequency [MHz]
characteristics (untuned input, asymmetrical output)
Cross modulation [dBµ]
fIF=45MHz 100kHz fUD=fD+12MHz fUD=fD-12MHz
output level [dBm]
fRF=100MHz (VHF) fRF=450MHz (UHF) both f=45 MHz. Reception frequency [MHz]
input level [dBm]
-10-
CXA3125N
Input Impedance
j100
VHFin1
50MHz 1000p
VHFin2
350MHz
-j25
-j100
-j50
Input Impedance
j100
UHFin1
1000p
UHFin2
350MHz
800MHz
-j25
-j100
-j50
-11-
CXA3125N
Output Impedance (symmetrical output)
j100
38MHz
45MHz
-j25
-j100
-j50
Output Impedance (asymmetrical output)
j100
38MHz
45MHz
-j25
-j100
-j50
-12-
CXA3125N
Package Outline
Unit
16PIN 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-16P-L01 SSOP016-P-0044 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER PALLADIUM PLATING 42/COPPER ALLOY 0.1g
-13-

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