CXA1665AM/AM-S All Band TV Tuner IC (VHF-CATV-UHF) Description The CXA1665AM/AM-S is a single chip TV tuner IC which performs as an oscillator, mixer for VHF/CATV and UHF bands. An IF amplifier is also provided. This IC adopts a 16-pin SOP package in response to the trend toward miniaturizing the tuner and automatic IC mounting. This IC achieves a large reduction of external parts in addition to miniaturizing the tuner and increasing manufacturing productivity, reliability and design efficiency. 16 pin SOP (Plastic) Structure Bipolar silicon monolithic IC Features • On-chip oscillator and mixer for UHF band • Low noise figure • Reduced spurious interference • Superior cross modulation distortion • Stable oscillating characteristics Applications • CTV tuner • CATV UP-DOWN converter • FM detector for 2nd IF satellite broadcasts Operation Conditions • Supply voltage • Operating temperature VOSC C UOSC B2 UOSC E2 UOSC E1 UOSC B1/SW REG UHF IN2 UHF IN1 Absolute Maximum Ratings (Ta = 25°C) • Supply voltage VCC 11 V • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation PD 980 mW (When mounted on a board) 16 15 14 13 12 11 10 9 Block Diagram and Pin Configuration (Top View) SW UHF OSC VCC 9.0 ± 0.9 Topr –20 to +75 V °C UHF MIX VHF MIX VHF OSC V. REG GND MIX OUT1 MIX OUT2 5 6 7 8 VHF IN2 4 VHF IN1 3 VCC 2 IF OUT 1 VOSC B – 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– E95826A63-ST CXA1665AM/AM-S Pin Description and Equivalent Circuit Pin No. Symbol Typical voltage (V) Equivalent circuit Description Under VHF operating; 3.5 1 VCC VOSC B 6 800 Under UHF operating; 3.7 16 1 3k VHF ocsillator. 3k 6.7 25P 16 VOSC C 9.0 2 GND 0 GND 7.5 3 VCC MIX OUT1 450 7.3 6 450 5k 3 4 5k Mixer output and IF amplifier input. 7.5 4 MIX OUT2 7.3 VCC 6 4.5 5 55 IF OUT IF output. 5 4.5 6 VCC 9 Power supply. –2– CXA1665AM/AM-S Pin No. Symbol Typical voltage (V) Equivalent circuit Description 3.2 7 VHF IN1 3.3 7 VHF input; normally a decoupling capacitor is connected at Pin 7 to GND and Pin 8 is used for input. 8 3k 3k 3.2 8 VHF IN2 3.3 3.3 9 UHF IN1 3.2 UHF input. The balanced input to Pins 9 and 10, or a decoupling capacitor is connected at Pin 10 to GND and Pin 9 is used for input. 10 9 3k 3k 3.3 10 UHF IN2 3.2 VCC 11 REG 6 UOSC B1/SW 0 12 6 Regulator output. 11 13 12 3.4 14 15 VCC 6 0 13 20k UOSC E1 2.6 3.2 14 UOSC E2 40k 8k 2.6 3.7 15 UOSC B2 3.4 –3– 8k UHF oscillator. Pin 12 is used for both U/V switches. CXA1665AM/AM-S Electrical Characteristics Item Circuit current Conversion gain∗1 Noise figure∗1 ∗2 ∗4 1% cross modulation ∗1 ∗3 Max. output power Symbol Min. Typ. Max. Unit Condition ICCV VHF operation; no signal 30 45 58 mA ICCU UHF operation; no signal 29 44 57 mA CG1 VHF operation; fRF = 55MHz; Input level –40dBm 20 23 26 dB CG2 VHF operation; fRF = 360MHz; Input level –40dBm 20 23 26 dB CG3 UHF operation; fRF = 360MHz; Input level –40dBm 25 28 31 dB CG4 UHF operation; fRF = 800MHz; Input level –40dBm 25 28 31 dB NF1 VHF operation; fRF = 55MHz 10 13 dB NF2 VHF operation; fRF = 360MHz 10 13 dB NF3 UHF operation; fRF = 360MHz 7 11 dB NF4 UHF operation; fRF = 800MHz 8 12 dB CM1 VHF operation; fD = 55MHz, fUD = ±12MHz 96 100 dBµ CM2 VHF operation; fD = 360MHz, fUD = ±12MHz 94 98 dBµ CM3 UHF operation; fD = 360MHz, fUD = ±12MHz 88 92 dBµ CM4 UHF operation; fD = 800MHz, fUD = ±12MHz 87 91 dBµ +8 +11 dBm Pomax 50Ω load (sat) ∆fsw1 VHF operation; fOSC = 100MHz frequency drift for the time from 3s to 3min after switch ON ±300 kHz ∆fsw2 VHF operation; fOSC = 405MHz frequency drift for the time from 3s to 3min after switch ON ±500 kHz ∆fsw3 UHF operation; fOSC = 405MHz frequency drift for the time from 3s to 3min after switch ON ±500 kHz ∆fsw4 UHF operation; fOSC = 845MHz frequency drift for the time from 3s to 3min after switch ON ±500 kHz ∆fst1 VHF operation; fOSC = 100MHz frequency shift when VCC + 9V changes ±5% ±200 kHz ∆fst2 VHF operation; fOSC = 405MHz frequency shift when VCC + 9V changes ±5% ±250 kHz ∆fst3 UHF operation; fOSC = 405MHz frequency shift when VCC + 9V changes ±5% ±250 kHz ∆fst4 UHF operation; fOSC = 845MHz frequency shift when VCC + 9V changes ±5% ±250 kHz Switch ON drift∗4 +B supply voltage drift (See Electrical Characteristics Measurement Circuit. Ta = 25°C, VCC = 9V) ∗1 Measured value for untuned inputs. ∗2 Noise figure is uncorrected for image. ∗3 Desired signal (fD) input level is –33dBm. undesired signal (fUD) is 100kHz at 30% AM. The measurement value is undesired signal level, it measured with a spectrum analyzer at S/I = 46dB. ∗4 Design guaranteed items. –4– L1 L2 L3 3k VL 1n VH 51 +9V SW1 51 1n 1n 51k 1p L2 51k 1T362 16p 1p (UK) 16 14 68p 3 68p 4 2 13 1 10T 2P 3P VOSC B 15 9p (SL) 51k 1T363 1T363 27p (RH) 0.5p (UK) UOSC B2 GND 1T363 51k 51k L3 UOSC E2 MIX OUT1 51k 0.5p (UK) 68p (RH) 4.7n VOSC C UOSC E1 MIX OUT2 L1 VC 3p 3P 51k 12 0.5p (UK) 27p (RH) 1n IF out 5 1n 11 10k SW2 ON:UHF OFF:VHF 20k +9V REG Coil Number diameter of windings 3.2 5.5T 3.2 2.5T 3.8 1.5T UOSC B1/SW IF OUT –5– 1n +9V 1n 6 VCC Wire diameter 0.5 0.5 0.5 10 1n 1n 9 7 1n VHF in 8 1n UHF in UHF IN2 VHF IN1 Table 1. Inductance constant UHF IN1 VHF IN2 Electrical Characteristics Measurement Circuit CXA1665AM/AM-S CXA1665AM/AM-S Description of Operation (See Electrical Characteristics Test Circuit.) (1) VHF oscillator circuit The differential oscillator circuit with an output at Pin 16 and an input at Pin 1. Connect an LC resonance circuit comprising a varicap diode to Pin 16 through a coupling capacitor. The positive feedback from the resonance circuit is applied to Pin 1 through a feedback capacitor to execute oscillation. Note that if a parasitic capacitance across Pins 1 and 16 is too large, it may cause undesired oscillation. (2) VHF mixer circuit This is a double-balanced mixer having small leakage of local oscillation signal. The RF signal is input to Pins 7 and 8. In normal use, the signal is input to one pin while the other pin is connected to GND by decoupling capacitor. The RF signal is converted to IF with the signal supplied from oscillator. The converted RF is sent to the IF amplifier and output to Pins 3 and 4 simultaneously. (3) UHF oscillator circuit UHF oscillator is formed from two collector-grounded Colpitts oscillator, and oscillation is provided at the differential input through an LC resonator circuit including a varicap diode. The Pin 12 also functions as UHF/VHF switch pin. (4) UHF mixer circuit This is the double-balanced mixer like the VHF mixer. The RF signal is input to Pins 9 and 10. There is a balanced differential input from pre-stage double tune circuit, or an unbalanced input to Pin 9 with the capacitor connected at Pin 10 to GND. Balanced input achieves better NF rather than unbalanced input. Otherwise, the conditions and usage are the same as those for the VHF mixer circuit. (5) IF amplifier circuit The mixer output signal is amplified by the IF amplifier and output to Pin 5. The output impedance is about 75Ω. (6) UHF/VHF switch circuit UHF/VHF mode is selected by the DC voltage at Pin 12. UHF operation is chosen by inputting 9V through a 20kΩ resistor, and VHF operation by inputting 0V. If the UHF switch voltage is 12V not 9V, adjust the resistance to approximately 30kΩ so that the DC voltage becomes almost equal between Pins 12 and 15. Be sure to connect a resistor for discharging (approx. 10kΩ) if OPEN not 0V is chosen for the VHF switch voltage. Note on Usage Care should be taken such as grounding in placing external parts because high frequencies are present. Adjust accordingly to prevent heat problems with special care such as the GND pattern for heat dissipation at the portion for IC mount where heat dissipations accumulate. –6– CXA1665AM/AM-S Example of Representative Characteristics Circuit current vs. Supply voltage Conversion gain vs. Reception frequency (Untuned input) 40 fIF = 45MHZ CG — Conversion gain [dB] ICC — Circuit current [mA] 50 VHF UHF 40 30 UHF VHF 20 10 30 0 8 9 VCC — Supply voltage [V] 0 10 Noise figure vs. Reception frequency (Untuned input, in DSB) Next adjacent cross modulation vs. Reception frequency (Untuned input) 20 120 fIF = 45MHZ CM — Cross modulation [dBµ] 100 15 10 VHF UHF 5 80 fUD = fD + 12MHZ fUD = fD – 12MHZ 60 40 fIF = 45MHz Interference signal: 100kHz 30% AM 20 0 0 0 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] I/O characteristics (Untuned input) 20 10 0 IF output level [dBm] NF — Noise figure [dB] 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] –10 fIF = 45MHZ fRF = 100MHZ (VHF) –20 –30 –40 –50 –50 –40 –30 –20 –10 RF input level [dBm] –7– 0 +10 CXA1665AM/AM-S VHF Input Impedance j50 j25 j100 j150 j250 j10 50MHz 0 50 100MHz 200MHz 400MHz –j10 –j250 IC –j150 VHF IN1 VHF IN2 5 4 6 8 7 –j100 –j25 1n S11 –j50 UHF Input Impedance j50 j25 j100 j150 j250 j10 0 50 –j10 400MHz –j250 S11 –j150 1n 600MHz 800MHz –j100 –j25 13 12 11 10 9 UHF IN2 UHF IN1 IC –j50 –8– CXA1665AM/AM-S IF Output Impedance j50 j25 j100 j150 j250 j10 50MHz 60MHz 40MHz 0 50 –j250 –j10 –j150 –j100 –j25 –j50 –9– CXA1665AM/AM-S Package Outline Unit: mm CXA1665AM 16PIN SOP (PLASTIC) 300mil + 0.4 9.9 – 0.1 + 0.4 1.85 – 0.15 16 9 6.9 8 + 0.1 0.2 – 0.05 1.27 0.45 ± 0.1 0.5 ± 0.2 1 + 0.2 0.1 – 0.05 7.9 ± 0.4 + 0.3 5.3 – 0.1 0.15 ± 0.12 M PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE SOP-16P-L01 EIAJ CODE ∗SOP016-P-0300-A EPOXY RESIN LEAD TREATMENT SOLDER PLATING LEAD MATERIAL COPPER ALLOY PACKAGE WEIGHT 0.2g JEDEC CODE CXA1665AM-S 16PIN SOP(PLASTIC) + 0.2 1.25 – 0.1 ∗9.7 ± 0.1 0.1 ∗5.6 ± 0.1 A 8 1 0.12 M 7.6 ± 0.2 9 16 + 0.1 0.4 – 0.05 + 0.05 0.15 – 0.02 1.27 0.5 ± 0.2 0.1 ± 0.1 0° to 10° NOTE: “∗” Dimensions do not include mold protrusion. DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SONY CODE SOP-16P-L04 LEAD TREATMENT SOLDER/PALLADIUM PLATING EIAJ CODE SOP016-P-0300 LEAD MATERIAL COPPER ALLOY PACKAGE WEIGHT 0.1g JEDEC CODE – 10 –