CXA3025N All Band TV Tuner IC (VHF-CATV-UHF) Description The CXA3025N is a single chip TV tuner IC which performs as a mixer, oscillator for UHF and VHFCATV bands. An IF amplifier is also provided. This IC adopts a 24-pin SSOP package (0.8mm pitch) in response to the trend towards miniaturizing the tuner and automatic IC mounting. 24 pin SSOP (Plastic) Features • Low noise figure • Superior cross modulation • Low spurious • Stable oscillating characteristics • Local oscillator output for PLL • Double tune filter connectable to MIX output • Low thermal resistance package Absolute Maximum Ratings (Ta = 25°C) 10.5 V • Supply voltage VCC • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation PD 1200 mW (when mounted on a board) Operating Conditions • Supply voltage • Operating temperature Structure Bipolar silicon monolithic IC VCC Topr 9.0 ± 0.9 –20 to +75 V °C Applications • TV tuner • CATV tuner • VCR tuner IFOUT BANDSW PLLOUT UOSCB2 UOSCE2 GND GND UOSCE1 UOSCB1 VOSCC NC VOSCB Block Diagram and Pin Configuration (Top View) 24 23 22 21 20 19 18 17 16 15 14 13 UHF OSC OSC BUFF VHF OSC BAND SW VHF MIX IFIN2 VCC MIXOUT1 MIXOUT2 7 8 9 10 11 12 UHFIN2 IFIN1 6 UHFIN1 5 NC 4 VHFIN2 3 VHFIN1 2 GND 1 UHF MIX GND REG IF AMP 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– E95Y06-ST CXA3025N Pin Description and Equivalent Circuit Pin No. 1 Symbol Pin voltage typ. (V) Equivalent circuit Description During VHF reception — IFIN1 During UHF reception — 2 1 8k 8k IF amplifier inputs. — 2 IFIN2 — 3 VCC 9.0 Power supply. 7.4 4 MIXOUT1 VCC 3 7.2 450 450 4 5 Mixer outputs. 7.4 5 MIXOUT2 7.2 3.2 8 VHFIN1 3.4 8 9 6k 6k 3.2 9 VHF inputs. Normally a capacitor is connected at Pin 8 to GND and Pin 9 is used for input. VHFIN2 3.4 10 No connected. NC 3.4 11 UHFIN1 3.2 12 6k 11 6k 3.4 12 UHFIN2 UHF inputs. Balanced input to Pins 11 and 12 or a capacitor is connected at Pin 11 to GND and Pin 12 is used for input. 3.2 3.3 13 15 3 VCC VOSCB 1k 3.5 13 3k 3k VHF oscillators. 6.3 15 VOSCC 9.0 14 NC No connected. –2– CXA3025N Pin No. Symbol 16 UOSCB1 17 UOSCE1 20 UOSCE2 21 UOSCB2 Pin voltage typ. (V) Equivalent circuit 3.5 3.3 21 20 17 16 3.0 2.5 UHF oscillators. 3.0 2.5 6, 7 GND 18 19 3.5 3.3 0 GNDs. 3 5.8 22 Description PLLOUT VCC PLL IC oscillator output. 30 22 3.2k 5.7 3 0 VCC 900 23 BANDSW 1.6k 23 20k 3.0 Band switching. UHF operation when 3V or more voltage is applied externally, and VHF operation when OPEN or 0.5V or less voltage is applied. VCC Under VHF operation : 4.5 24 3 47 IFOUT 24 Under UHF operation : 4.5 –3– IF output. CXA3025N Electrical Characteristics Item Circuit current Conversion gain∗1 Noise figure∗1 ∗2 1% cross modulation ∗1 ∗3 Max. output power Switch ON drift∗4 +B drift∗5 See Electrical Characteristics Measurement Circuit. (Ta = 25°C, VCC = 9V) Symbol Measurement conditions Min. Typ. Max. Unit IccV VHF operation; no signal 38 53 63 mA IccU UHF operation; no signal 37 51 62 mA CG1 VHF operation; fRF = 55MHz; Input level –40dBm 17 20 23 dB CG2 VHF operation; fRF = 360MHz; Input level –40dBm 18 21 24 dB CG3 UHF operation; fRF = 360MHz; Input level –40dBm 23 26 29 dB CG4 UHF operation; fRF = 800MHz; Input level –40dBm 23 26 29 dB NF1 VHF operation; fRF = 55MHz 13 16 dB NF2 VHF operation; fRF = 360MHz 12 15 dB NF3 UHF operation; fRF = 360MHz 9 13 dB NF4 UHF operation; fRF = 800MHz 9 13 dB CM1 VHF operation; fD = 55MHz; fUD = ±12MHz 99 102 dBµ CM2 VHF operation; fD = 360MHz; fUD = ±12MHz 97 100 dBµ CM3 UHF operation; fD = 360MHz; fUD = ±12MHz 91 94 dBµ CM4 UHF operation; fD = 800MHz; fUD = ±12MHz 89 92 dBµ +8 +10 dBm Pomax 50Ω load (sat) ∆fsw1 VHF operation; fOSC = 100MHz ±200 kHz ∆fsw2 VHF operation; fOSC = 405MHz ±300 kHz ∆fsw3 UHF operation; fOSC = 405MHz ±300 kHz ∆fsw4 UHF operation; fOSC = 845MHz ±300 kHz ∆fst1 VHF operation; fOSC = 100MHz ±100 kHz ∆fst2 VHF operation; fOSC = 405MHz ±200 kHz ∆fst3 UHF operation; fOSC = 405MHz ±150 kHz ∆fst4 UHF operation; fOSC = 845MHz ±150 kHz PLL OUT output power PoscV VHF operation; 50Ω load –20 –10 dBm PoscU UHF operation; 50Ω load –20 –10 dBm Band switch voltage VswV VHF operation 0 0.5 V VswU UHF operation 3 10.5 V ∗1 Measured value for untuned inputs. ∗2 Noise figure is the directly-read value of the NF meter in DSB. ∗3 Desired signal (fD) input level is –33dBm. Undesired signal (fUD) is 100kHz, 30% AM at ±12MHz. The measurement value is the undesired signal level, measured with a spectrum analyzer at S/I = 46dB. ∗4 Frequency variation from 3 seconds to 3 minutes after switch ON. ∗5 Frequency variation when VCC = 9V ± 5% variation. –4– CXA3025N Electrical Characteristics Measurement Circuit 100 +9V PLL OUT 1n VC 15µ 1n +9V 0.5φ 3.2φ 5.5t 47k BAND SW ON: UHF OFF: VHF 1T363 0.5φ 2.6φ 1.5t 47k IF OUT 47k 0.5φ 3.2φ 2.5t 0.5p (UK) 1n 56p 3.3k 4p 14p 56p VL 51 51 VH 1n 1n 10k 3.3k 47k 0.5p (UK) 47k 1T363 68p (RH) 1n 1T362 16p 4p 2p 1n 47k 13 UHFIN1 UHFIN2 4 5 6 7 8 9 10 11 12 VHFOSCB NC 3 VHFOSCC UHFOSCB1 2 GND 1 GND VHFIN2 NC 14 UHFOSCE1 UHFOSCE2 15 16 VHFIN1 UHFOSCB2 17 GND PLLOUT 18 GND BANDSW 19 MIXOUT2 20 MIXOUT1 21 VCC 22 IFIN2 23 22 IFIN1 24 IFOUT 1p (UK) CXA3025N 1n 1n 1n 1n L1 51p 4.7µ 51p VHF IN 1n UHF IN +9V Inductance constant L without indication is an air-core coil of 0.5mm diameter. –5– VL/VH SW CXA3025N Application Circuit 100 +9V PLL OUT 1n VC 15µ 1n +9V 47k BAND SW ON: UHF OFF: VHF 1T363 51 0.5p (UK) 47k 47k 0.5φ 3.2φ 2.5t 1n 15p 3.3k 4p 7p VH 1n 1n 47k 10k VL 51 1T363 0.5p (UK) IF OUT 3.3k 0.5φ 3.2φ 5.5t 0.5φ 3.8φ 1.5t 47k 0.5p (UK) 47k 15p 1T363 68p (RH) 1n 2p 1T362 4p 16p 47k 1p (UK) 13 UHFIN1 UHFIN2 2 3 4 5 6 7 8 9 10 11 12 VHFOSCB NC 1 VHFOSCC UHFOSCB1 VHFIN2 NC 14 UHFOSCE1 15 VHFIN1 GND UHFOSCE2 16 GND UHFOSCB2 17 GND PLLOUT 18 GND BANDSW 19 MIXOUT2 20 MIXOUT1 21 VCC 22 IFIN2 23 22 IFIN1 24 IFOUT 1n CXA3025N 4.7k 1n 27P 1n 1n 1n 150P 12.5t 4φ VHF IN 3.5t 4φ 4.7µ 1n UHF IN Inductance constant L without indication is an air-core coil of 0.5mm diameter. +9V Circuit when using two varicap diodes for the UHF oscillator, improving the oscillator stability and frequency variable range, and using a double tune circuit for the IF tune circuit. Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. –6– CXA3025N Description of Operation (See Electrical Characteristics Measurement Circuit.) VHF oscillator circuit This is a differential amplifier type oscillator circuit with an output at Pin 15 and an input at Pin 13. Connect an LC resonance circuit comprising a varicap diode to Pin 15 through a coupling capacitor, and input the positive feedback from this resonance circuit to Pin 13 through a feedback capacitor to execute oscillation. Note that if the capacitance across Pins 13 and 15 is too large, positive feedback may be applied via a parasitic capacitance causing undesired stray oscillation. The resistance connected to Pin 13 is for preventing parasitic oscillation, and is inserted to ensure stable oscillation. VHF mixer circuit The mixer circuit adopts a common emitter type double-balanced mixer with little leakage of the local oscillation signal. The RF signal is input to Pins 8 and 9. During normal use, the RF signal is input to one pin while the other pin is connected to GND. The RF signal is converted to IF frequency by the signal supplied from the oscillator and then output to Pins 4 and 5. UHF oscillator circuit The UHF oscillator is formed from two collector-grounded Colpitts oscillators, and oscillation is provided at the differential input through an LC resonance circuit comprising a varicap diode. An LC resonance circuit comprising a varicap diode is connected across Pins 16, 17, 20 and 21. UHF mixer circuit Like the VHF mixer, the UHF mixer adopts a double-balanced mixer. The RF signal is input to Pins 11 and 12. There is a balanced input at the differential from both edges of the secondary coil of the pre-stage double tune circuit, or an unbalanced input to Pin 11 with a capacitor connected at Pin 12 to GND. Otherwise, the conditions and usage are the same as those for the VHF mixer circuit. IF amplifier circuit The signal frequency converted by the mixer is output from Pins 4 and 5, and input to IF input pins 1 and 2 through an external IF tune circuit. For the IF tune circuit, a single tune circuit like the electrical characteristics measurement circuit or a double tune circuit can be connected. The signal amplified by the IF amplifier is output from Pin 24. The output impedance is approximately 75Ω. Also, the input block of the IF amplifier has a built-in coupling capacitor, and direct connection with the mixer output is possible. U/V switch circuit UHF operation is chosen by applying voltage of 3V or more to Pin 23; VHF operation for 0V or OPEN. PLL oscillator signal output circuit The oscillation signal is output to Pin 22 (PLLOUT) through a buffer amplifier. The resistance connected to the output pin is used to adjust the current flowing to the buffer amplifier. The resistance value is adjusted depending on the connected load, and output distortion can be minimized. Notes on Operation Care should be taken for grounding, etc. when placing external parts as high operating frequencies are present. In addition, since the GND pins (Pins 6, 7, 18 and 19) also serve as heat dissipation pins, care should be taken to prevent heat problems. Care should also be taken to prevent electrostatic damage to high frequency I/O pins. –7– CXA3025N Example of Representative Characteristics Conversion gain vs. Reception frequency (Untuned input) Next adjacent cross modulation vs. Reception frequency (Untuned input) 120 40 VHF (Low) VHF (High) CM – Cross modulation [dBµ] 100 30 CG – Conversion gain [dB] UHF VHF (Low) VHF (High) 20 UHF fIF = 45MHz, 100kHz 30%AM 80 fUD = fD +12MHz fUD = fD –12MHz 60 40 20 0 10 0 100 200 300 400 500 600 700 800 900 Receiving frequency [MHz] 0 0 100 200 300 400 500 600 700 800 900 Receiving frequency [MHz] Noise figure vs. Reception frequency (Untuned input, in DSB) I/O characteristics (Untuned input) 20 20 fIF = 45MHz 15 fRF = 100MHz (VHF) fRF = 450MHz (UHF) fIF is 45MHz in both cases –20 NF – Noise figure [dB] IF output level [dBm] 0 VHF (Low) UHF 10 5 –40 –60 –60 VHF (High) 0 –50 –40 –30 –20 –10 0 0 10 100 200 300 400 500 600 700 800 900 Receiving frequency [MHz] RF input level [dBm] –8– CXA3025N Circuit current vs. Supply voltage 60 Circuit current [mA] VHF UHF 50 40 8 9 10 Supply voltage [V] +B drift vs. Oscillation frequency 300 VCC + 5% VCC – 5% (VCC = 9V) 200 Drift [kHz] 100 0 –100 –200 –300 0 100 200 300 400 500 600 700 800 900 Oscillation frequency [MHz] PLLOUT level (fundamental harmonic and secondary higher harmonic) vs. Oscillation frequency 0 PLLOUT level [dBm] –10 –20 –30 –40 –50 Fundamental harmonic output level Secondary higher harmonic output level –60 0 100 200 300 400 500 600 Oscillation frequency [MHz] –9– 700 800 900 CXA3025N VHF Input Impedance j50 j100 j25 300MHz 400MHz –j25 UHFIN1 UHFIN2 50MHz 100MHz 200MHz NC 50 VHFIN2 0 VHFIN1 IC 8 9 10 11 12 1000pF S11 –j100 –j50 UHF Input Impedance j50 j100 j25 UHFIN2 50 UHFIN1 0 NC IC 10 11 12 1000pF 200MHz S11 400MHz 600MHz 800MHz –j25 –j100 –j50 – 10 – CXA3025N IF OUT Impedance j50 j100 j25 0 50 60MHz 45MHz 30MHz –j100 –j25 –j50 PLL OUT Impedance j50 j100 j25 0 135MHz 50 850MHz 470MHz –j100 –j25 –j50 – 11 – CXA3025N Package Outline Unit: mm 24PIN SSOP (PLASTIC) + 0.2 1.25 – 0.1 ∗9.7 ± 0.1 24 0.1 1 0.13 M 7.6 ± 0.2 ∗5.6 ± 0.1 13 A 12 + 0.08 0.32 – 0.07 0.8 + 0.05 0.32 – 0.04 0.1 ± 0.1 (0.3) 0.25 (0.15) + 0.02 0.17 – 0.01 0° to 10° 0.6 ± 0.15 (0.5) B DETAIL B DETAIL A NOTE: Dimension “∗” does not include mold protrusion. PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SONY CODE SSOP-24P-L03 LEAD TREATMENT SOLDER / PALLADIUM PLATING EIAJ CODE SSOP024-P-0056 LEAD MATERIAL COPPER ALLOY PACKAGE WEIGHT 0.1g JEDEC CODE – 12 –