CXA3225N All Band TV Tuner IC (VHF-CATV-UHF) Description The CXA3225N is a TV tuner monolithic IC which integrates local oscillator and mixer circuits for VHF band, local oscillator and mixer circuits for UHF band, and an IF amplifier onto a single chip. This IC adopts a 20-pin SSOP package and is suitable for miniaturizing voltage synthesizer tuner. Features • Low power consumption (5 V, 46 mA typ.) • Single 5 V power supply • Superior cross modulation • Balance-type UHF oscillator with good oscillation stability (4 pins) • IF output can be selected from symmetrical or asymmetrical • Double-tuned filter can be connected to MIX output • SSOP 20-pin package Applications • TV tuners • VCR tuners • CATV tuners 20 pin SSOP (Plastic) -Absolute Maximum Ratings (Ta=25 °C) • Supply voltage VCC1 –0.3 to +5.5 V • Storage temperature Tstg –55 to +150 °C • Allowable power dissipation PD 465 mW (when mounted on a printed circuit board) Operating Conditions • Supply voltage • Operating temperature VCC1 Topr 4.75 to 5.30 –20 to +75 V °C Structure Bipolar silicon monolithic 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— E98950-TE CXA3225N IFOUT1 IFOUT2 BANDSW UOSCB2 UOSCE2 UOSCE1 UOSCB1 VOSCC VOSCB2 VOSCB1 Block Diagram and Pin Configuration 20 19 18 17 16 15 14 13 12 11 IF AMP UHF OSC VHF OSC Buffer Buffer VHF MIX UHF MIX Bias 1 2 3 4 5 6 7 8 9 10 IFIN1 IFIN2 VCC MIXOUT1 MIXOUT2 GND IFSW VHFIN UHFIN1 UHFIN2 V. REG —2— CXA3225N Pin Description and Equivalent Circuit Pin No. Symbol Typical pin voltage (V) Equivalent circuit Description 3 1 IFIN1 2.4 1 2 5k 2 IFIN2 3 VCC 4 5 6 5k 2.4 5.0 4.4 during VHF reception MIXOUT1 4.3 during UHF reception 4.4 during VHF reception MIXOUT2 4.3 during UHF reception GND 0 Power supply. 4 5 Mixer outputs. These pins are output with open collector, and they must be connected to the power supply via the load. GND. Switching of VHF input ground and IF symmetrical/ asymmetrical output. Asymmetrical output is selected for open state; symmetrical output for grounding. When used as an asymmetrical output, ground this pin with a capacitor. 3 20k 7 IFSW 0.8 (when open) 7 500 3 2.4 during VHF reception 8 VCC 8 VHFIN 7 3k 3k IFSW 2.6 during UHF reception 9 10 UHFIN1 UHFIN2 IF amplifier input. 2.6 during VHF reception 2.3 during UHF reception 2.6 during VHF reception 2.3 during UHF reception VHF inputs. Input format is asymmetrical input. 3 9 10 3k 3k —3— UHF inputs. Input the signal to Pins 9 and 10 symmetrically or ground Pin 10 with a capacitor and input to Pin 9. CXA3225N Pin No. Symbol 11 VOSCB1 12 VOSCB2 13 VOSCC 14 UOSCB1 15 16 17 UOSCE1 UOSCE2 UOSCB2 Typical pin voltage (V) 2.1 during VHF reception 2.2 during UHF reception 2.1 during VHF reception 2.2 during UHF reception 4.2 during VHF reception 5 during UHF reception 2.3 during VHF reception 2.1 during UHF reception 1.8 during VHF reception 1.5 during UHF reception 1.8 during VHF reception 1.4 during UHF reception 2.3 during VHF reception 2.1 during UHF reception Equivalent circuit Description 3 400 VCC 13 50 12 11 3k 3k External resonance circuit connection for VHF oscillators. Pin 12 is grounded with a capacitor. 3 VCC 14 15 16 17 3k External resonance circuit connection for UHF oscillators. 3k VCC 3 18 BANDSW — Band switching. UHF operation for 3.0 V or more, and VHF operation for 0.5 V or less or open state. 10k 18 100k 2.8 during symmetrical output 19 3 VCC 15 IFOUT2 19 4.5 during asymmetrical output —4— IF output during symmetrical output. The opposite phase signal to Pin 20 is output during symmetrical output. When asymmetrical output is selected, the signal is not output. CXA3225N Pin No. Symbol Typical pin voltage (V) 2.8 during symmetrical output 20 Equivalent circuit 3 VCC 15 IFOUT1 2.8 during asymmetrical output Description 20 —5— IF output. CXA3225N Electrical Characteristics Symbol ICCVU Item ICCVB ICCUU ICCUB CG1U CG2U CG3U CG4U Conversion gain CG1B ∗4 ∗1 CG2B ∗4 CG3B ∗4 CG4B ∗4 Circuit current Noise figure ∗1, ∗2 NF1 NF2 NF3 NF4 CM1 1 % cross modulation CM2 ∗1 ∗3 CM3 CM4 Maximum output power See the Electrical Characteristics Measurement Circuit (Ta=25 °C, VCC=5 V) Measurement conditions VHF operation asymmetrical output no input signal VHF operation symmetrical output no input signal UHF operation asymmetrical output no input signal UHF operation symmetrical output no input signal VHF operation fRF=50 MHz asymmetrical output VHF operation fRF=430 MHz asymmetrical output UHF operation fRF=430 MHz asymmetrical output UHF operation fRF=850 MHz asymmetrical output VHF operation fRF=50 MHz symmetrical output VHF operation fRF=430 MHz symmetrical output UHF operation fRF=430 MHz symmetrical output UHF operation fRF=850 MHz symmetrical output VHF operation fRF=50 MHz asymmetrical output VHF operation fRF=430 MHz asymmetrical output UHF operation fRF=430 MHz asymmetrical output UHF operation fRF=850 MHz asymmetrical output VHF operation fD=50 MHz fUD=±12 MHz asymmetrical output VHF operation fD=430 MHz fUD=±12 MHz asymmetrical output UHF operation fD=430 MHz fUD=±12 MHz asymmetrical output UHF operation fD=850 MHz fUD=±12 MHz asymmetrical output Pomax (sat) 50 Ω load, asymmetrical output ∆fsw1 VHF operation fOSC=100 MHz ∆f from 3 seconds to 3 minutes after switch ON VHF operation fOSC=470 MHz ∆f from 3 seconds to 3 minutes after switch ON UHF operation fOSC=470 MHz ∆f from 3 seconds to 3 minutes after switch ON UHF operation fOSC=895 MHz ∆f from 3 seconds to 3 minutes after switch ON ∆fsw2 Switch ON drift ∆fsw3 ∆fsw4 Min. 35 47 39 51 20 20 23 23 29 29 32 32 Typ. 46 58 50 62 23 23 26 26 32 32 35 35 12 13 10 12 Max. 55 67 59 71 26 26 29 29 35 35 38 38 16 17 13 15 Unit mA mA mA mA dB dB dB dB dB dB dB dB dB dB dB dB 99 103 dBµ 96 100 dBµ 96 100 dBµ 95 99 dBµ 7 10 dBm ±300 kHz ±600 kHz ±350 kHz ±350 kHz ∗1 Value measured with untuned input. ∗2 NF meter direct-reading value (DSB measurement). ∗3 Value with a desired reception signal input level of –30 dBm, an interference signal of 100 kHz/30 % AM, and an interference signal level where S/I=46 dB measured with a spectrum analyzer. ∗4 Value which is measured as 420 Ω load impedance and compensated loss by 180 Ω resistor connected to Pins 19 and 20. —6— CXA3225N Item Symbol ∆fst1 Supply voltage drift ∆fst2 ∆fst3 ∆fst4 Band switching voltage VSWV VSWU Measurement conditions VHF operation fOSC=100 MHz ∆f when VCC 5 V ± 5 % variation VHF operation fOSC=470 MHz ∆f when VCC 5 V ± 5 % variation UHF operation fOSC=470 MHz ∆f when VCC 5 V ± 5 % variation UHF operation fOSC=895 MHz ∆f when VCC 5 V ± 5 % variation VHF operation UHF operation —7— Min. 0 3 Typ. Max. Unit ±200 kHz ±250 kHz ±150 kHz ±150 kHz 0.5 5.5 V V CXA3225N Description of Operation (See the Electrical Characteristics Measurement Circuit.) VHF oscillator circuit This circuit is a differential amplifier-type oscillator circuit. Pin 13 is the output, Pin 11 is the input and Pin 12 is the GND. Oscillation is performed by connecting an LC resonance circuit including a variable capacitance diode, to Pin 13 via coupled capacitance, inputting to Pin 11 with feedback capacitance, and applying positive feedback. Note that if the capacitance across Pins 11 and 13 is too large, positive feedback may be applied via a parasitic capacitance causing undesired stray oscillation. The resistor connected Pin 11 prevents the parasitic oscillation. VHF mixer circuit The mixer circuit employs a double balanced mixer with little local oscillation signal leakage. The input format is the base input type. Pin 7 is grounded and the RF signal is input to Pin 8. The RF signal is converted to IF frequency by the signal supplied from the oscillator and then output to Pins 4 and 5. Pins 4 and 5 are open collectors, so the power must be supplied externally. The electric potential of Pins 4 and 5 at this time must be DC 4.0 V or more. UHF oscillator circuit This oscillator circuit is designed so that two collector ground type Colpitts oscillators perform the differential oscillation operation via an LC resonance circuit including a variable capacitance diode. The resonance capacitors which configure the Colppits oscillator are connected between Pins 14 and 15, 15 and 16, 16 and 17. The LC resonance circuit including the variable capacitance diode Di is connected between Pins 14 and 17. UHF mixer circuit This circuit employs a double balanced mixer like the VHF mixer circuit. The RF signal is input to Pins 9 and 10. There are two input methods; one is the symmetrical input where the signal is input to Pins 9 and 10 differentially and the other is the asymmetrical input where Pin 9 is grounded via a capacitor and the signal is input to Pin 10. Pins 4 and 5 are the mixer outputs. Pins 4 and 5 are open collectors, so the power must be supplied externally. The electric potential of Pins 4 and 5 at this time must be DC 4.0 V or more. IF amplifier circuit The signals frequency converted by the mixer are output from Pins 4 and 5, and then they are input to the IF input Pins 1 and 2 via the external tuned circuit. As the IF tuned circuit, the single-tuned circuit shown in the Electrical Characteristics Measurement Circuit or double-tuned circuits can be connected. When used as the single-tuned filter, be sure to connect it via the capacitor so that the DC voltage may not be applied to Pins 1 and 2. The signal amplified by the IF amplifier is output with symmetrical or asymmetrical output format. Selecting symmetrical or asymmetrical is performed at Pin 7. Asymmetrical output when Pin 7 is grounded via the capacitor; symmetrical output when it is directly grounded. During symmetrical output, SAW filter direct connection is possible and during asymmetrical output. During asymmetrical output, output is performed from Pin 20, and during symmetrical output, output is performed from Pins 19 and 20. The output impedance is approximately 30 Ω. U/V switch circuit UHF operation is chosen by applying voltage of 3 V or more to Pin 18, VHF operation for 0 V or open. —8— CXA3225N Notes on Operation 1. Care should be taken for grounding, etc. when placing external parts as the operating frequencies are high. 2. Be sure to design the printed circuit board considering the radiation of heat by placing the GND pattern at the bottom of the IC. 3. Care should also be taken to prevent electrostatic damage because of using high frequency process. —9— CXA3225N Example of Representative Characteristics Supply voltage vs. Circuit current (symmetrical output) 70 Supply voltage vs. Circuit current (asymmetrical output) 68 54 66 UHF 52 UHF ICC-Circuit current [mA] ICC-Circuit current [mA] 64 50 48 VHF 46 62 VHF 60 58 56 44 54 42 52 50 40 4.7 4.8 4.9 5 5.1 5.2 5.3 4.7 5.4 4.8 4.9 5 5.1 5.2 5.3 5.4 VCC-Supply voltage [V] VCC-Supply voltage [V] Reception frequency vs. Next adjacent cross modulation (untuned input, asymmetrical output) 140 Reception frequency vs. Conversion gain (asymmetrical output) 40 fIF=38MHz 120 CM-Cross modulation [dBµ] CG-Conversion gain [dB] 30 UHF VHF (Low) VHF (High) 20 100 80 fIF=38MHz fUD=fD+12MHz fUD=fD–12MHz (100kHz, 30% AM) 60 40 10 20 0 0 0 100 200 300 400 500 600 700 800 900 1000 Reception frequency [MHz] 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] —10— CXA3225N Reception frequency vs. Noise figure (untuned input, asymmetrical output, DSB display) I/O characteristics (untuned input, asymmetrical output) 20 20 fIF=38MHz 15 0 IF output level [dBm] NF-Noise figure [dBm] VHF (High) UHF VHF (Low) 10 5 –20 fRF=100MHz (VHF) fRF=500MHz (UHF) fIF is both f=38MHz –40 0 0 –60 –60 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] –40 –20 0 RF input level [dBm] I/O characteristics (untuned input, symmetrical output) 40 Supply voltage fluctuation of oscillation frequency 400 VCC+5% VCC–5% (VCC=5V) 300 20 200 100 0 fRF=100MHz (VHF) fRF=500MHz (UHF) fIF is both f=38MHz +B drift [kHz] IF output level [dBm] VHF (Low) VHF (High) UHF 0 –100 –20 –200 –300 –40 –60 –400 –40 –20 0 0 RF input level [dBm] 100 200 300 400 500 600 700 800 900 Oscillation frequency [MHz] —11— CXA3225N Electrical Characteristics Measurement Circuit (asymmetrical output) 1n VT 1k BVL 3.3µ 3.2φ 6.5t 33p 47k 51 47k 51 +5V U/VSW BVH 47k ON : UHF OFF : VHF 1n 1n 47k 3φ 1.5t 2φ1.5t IF OUT 0.5p (UK) 680p 0.5p (UK) 1T363 1T363 12p (RH) 10k 1T362 1T362 47k 100p 47k 100p 47k 1n 100 20p VOSCB2 UHFIN1 UHFIN2 2 3 4 5 6 7 8 9 10 VOSCB1 VOSCC 1 UOSCE1 47k 11 VHFIN 12 UOSCB1 UOSCE2 13 IFSW UOSCB2 14 GND BANDSW 15 MIXOUT2 16 MIXOUT1 17 VCC 18 15p IFIN2 19 12p 6p IFIN1 20 IFOUT2 3p IFOUT1 16p CXA3225N 1n 12p 12p 1n 1n 1n 2k 5.5t 5.5t 56p 56p 100 1n VHF IN 3.3µ 1n +5V —12— UHF IN CXA3225N Electrical Characteristics Measurement Circuit (symmetrical output) 1n VT 1k BVL 3.3µ 3.2φ 6.5t 33p 47k 51 47k 51 +5V U/VSW BVH 47k ON : UHF OFF : VHF 1n 1n 47k 3φ 1.5t 2φ1.5t 0.5p (UK) 680p 0.5p (UK) 1T363 180 1T363 12p (RH) 10k 180 100p 47k 1T362 1T362 47k 100p 47k 1n 100 20p UHFIN2 2 3 4 5 6 7 8 9 10 VOSCB1 VOSCB2 UHFIN1 1 UOSCE1 47k 11 VOSCC 12 VHFIN 13 UOSCB1 UOSCE2 14 IFSW UOSCB2 15 GND 16 MIXOUT2 17 MIXOUT1 18 15p VCC 19 12p 6p IFIN2 20 BANDSW 3p IFOUT2 16p IFOUT1 1n IFIN1 IF OUT CXA3225N 1n 12p 12p 1n 1n 1n 1n 2k 5.5t 5.5t 56p 56p 100 1n VHF IN 3.3µ 1n +5V —13— UHF IN CXA3225N VHF Input Impedance j50 j25 VHFin 50MHz 50 IFSW 0 j100 7 8 1000p S11 350MHz –j100 –j25 500MHz –j50 UHF Input Impedance j50 j25 UHFin2 50 UHFin1 0 j100 9 10 1000p S11 350MHz 800MHz –j100 –j25 –j50 —14— CXA3225N IF Output Impedance (symmetrical output) j50 j25 j100 45MHz 0 50 38MHz –j100 –j25 –j50 IF Output Impedance (asymmetrical output) j50 j25 j100 38MHz 0 45MHz 50 –j100 –j25 –j50 —15— CXA3225N Package Outline Unit : mm 20PIN SSOP (PLASTIC) + 0.2 1.25 – 0.1 ∗6.5 ± 0.1 0.1 11 20 1 6.4 ± 0.2 ∗4.4 ± 0.1 A 10 + 0.05 0.15 – 0.02 0.65 + 0.1 0.22 – 0.05 0.13 M 0.5 ± 0.2 0.1 ± 0.1 0° to 10° DETAIL A NOTE: Dimension “∗” does not include mold protrusion. PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SOLDER / PALLADIUM PLATING SONY CODE SSOP-20P-L01 LEAD TREATMENT EIAJ CODE SSOP020-P-0044 LEAD MATERIAL 42/COPPER ALLOY PACKAGE MASS 0.1g JEDEC CODE NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). —16—