?1 cxa1665am/am-s e95826a63-st 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. features on-chip oscillator and mixer for uhf band low noise figure reduced spurious interference superior cross modulation distortion stable oscillating characteristics absolute maximum ratings (ta = 25?) supply voltage v cc 11 v storage temperature tstg ?5 to +150 ? allowable power dissipation p d 980 mw (when mounted on a board) block diagram and pin configuration (top view) structure bipolar silicon monolithic ic applications ctv tuner catv up-down converter fm detector for 2nd if satellite broadcasts operation conditions supply voltage v cc 9.0 0.9 v operating temperature topr ?0 to +75 ? 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. 16 pin sop (plastic) sw uhf osc uhf mix vhf mix if amp + vhf osc vosc c uosc b2 uosc e2 uosc e1 uosc b1/sw reg uhf in2 uhf in1 vosc b gnd mix out1 mix out2 if out v cc vhf in1 vhf in2 2 3 4 5 7 8 1 9 10 11 12 13 14 15 16 6 v. reg
?2 cxa1665am/am-s pin description and equivalent circuit pin no. symbol typical voltage (v) equivalent circuit description 1 16 vosc b vosc c 3 4 mix out1 mix out2 under vhf operating; 3.5 under uhf operating; 3.7 6.7 9.0 7.5 7.3 7.5 7.3 vhf ocsillator. mixer output and if amplifier input. 5 if out 4.5 4.5 if output. 2 gnd 0 gnd 6v cc 9 power supply. 16 6 1 800 25p 3k v cc 3k 6 v cc 450 5k 3 4 450 5k 5 6 v cc 55
?3 cxa1665am/am-s 7 8 vhf in1 vhf in2 3.2 3.3 3.2 3.3 vhf input; normally a decoupling capacitor is connected at pin 7 to gnd and pin 8 is used for input. 9 10 uhf in1 uhf in2 3.3 3.2 3.3 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. 11 reg 6 12 uosc b1/sw 13 uosc e1 14 uosc e2 15 uosc b2 0 0 3.2 3.7 3.4 2.6 2.6 3.4 regulator output. uhf oscillator. pin 12 is used for both u/v switches. 3k 3k 8 7 3k 3k 10 9 11 6 v cc 6 8k 8k 12 13 14 15 40k v cc 20k pin no. symbol typical voltage (v) equivalent circuit description
?4 cxa1665am/am-s electrical characteristics (see electrical characteristics measurement circuit. ta = 25?, v cc = 9v) * 1 measured value for untuned inputs. * 2 noise figure is uncorrected for image. * 3 desired signal (f d ) input level is ?3dbm. undesired signal (f ud ) 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. condition vhf operation; no signal uhf operation; no signal vhf operation; f rf = 55mhz; input level ?0dbm vhf operation; f rf = 360mhz; input level ?0dbm uhf operation; f rf = 360mhz; input level ?0dbm uhf operation; f rf = 800mhz; input level ?0dbm vhf operation; f rf = 55mhz vhf operation; f rf = 360mhz uhf operation; f rf = 360mhz uhf operation; f rf = 800mhz vhf operation; f d = 55mhz, f ud = 12mhz vhf operation; f d = 360mhz, f ud = 12mhz uhf operation; f d = 360mhz, f ud = 12mhz uhf operation; f d = 800mhz, f ud = 12mhz 50 load vhf operation; f osc = 100mhz frequency drift for the time from 3s to 3min after switch on vhf operation; f osc = 405mhz frequency drift for the time from 3s to 3min after switch on uhf operation; f osc = 405mhz frequency drift for the time from 3s to 3min after switch on uhf operation; f osc = 845mhz frequency drift for the time from 3s to 3min after switch on vhf operation; f osc = 100mhz frequency shift when v cc + 9v changes 5% vhf operation; f osc = 405mhz frequency shift when v cc + 9v changes 5% uhf operation; f osc = 405mhz frequency shift when v cc + 9v changes 5% uhf operation; f osc = 845mhz frequency shift when v cc + 9v changes 5% min. 30 29 20 20 25 25 96 94 88 87 +8 typ. 45 44 23 23 28 28 10 10 7 8 100 98 92 91 +11 max. 58 57 26 26 31 31 13 13 11 12 300 500 500 500 200 250 250 250 unit ma ma db db db db db db db db db db db db dbm khz khz khz khz khz khz khz khz item circuit current conversion gain * 1 noise figure * 1 * 2 * 4 1% cross modulation * 1 * 3 max. output power switch on drift * 4 +b supply voltage drift symbol i cc v i cc u cg1 cg2 cg3 cg4 nf1 nf2 nf3 nf4 cm1 cm2 cm3 cm4 pomax (sat) ? fsw1 ? fsw2 ? fsw3 ? fsw4 ? fst1 ? fst2 ? fst3 ? fst4
?5 cxa1665am/am-s electrical characteristics measurement circuit vosc c uosc b2 uosc e2 uosc e1 uosc b1/sw reg uhf in2 uhf in1 vosc b gnd mix out1 mix out2 if out v cc vhf in1 vhf in2 2 3 4 5 6 7 8 1 9 10 11 12 13 14 15 16 4.7n vc 51k l2 51k 68p (rh) 0.5p (uk) 1t363 1p (uk) 1p 1n l1 51 1n 3k 51k 1n 51 vh vl sw1 +9v 1t362 51k 16p 68p 68p 10t 3p 1n 1n if out +9v 1n 1n vhf in uhf in 1n 1n 1n 10k 20k sw2 on:uhf off:vhf 1n 0.5p (uk) 1t363 1t363 51k l3 0.5p (uk) 51k 3p 2p 3p 27p (rh) 51k 9p (sl) 27p (rh) table 1. inductance constant wire diameter 0.5 0.5 0.5 l1 l2 l3 +9v coil diameter 3.2 3.2 3.8 number of windings 5.5t 2.5t 1.5t
?6 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 75 . (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 20k resistor, and vhf operation by inputting 0v. if the uhf switch voltage is 12v not 9v, adjust the resistance to approximately 30k so that the dc voltage becomes almost equal between pins 12 and 15. be sure to connect a resistor for discharging (approx. 10k ) 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.
?7 cxa1665am/am-s example of representative characteristics conversion gain vs. reception frequency (untuned input) cg ?conversion gain [db] 40 30 reception frequency [mhz] 100 vhf uhf f if = 45mh z 20 10 0 0 200 300 400 500 600 700 800 900 noise figure vs. reception frequency (untuned input, in dsb) nf ?noise figure [db] 20 15 reception frequency [mhz] 100 vhf uhf f if = 45mh z 10 5 0 0 200 300 400 500 600 700 800 900 circuit current vs. supply voltage i cc ?circuit current [ma] 50 40 30 v cc ?supply voltage [v] 8910 vhf uhf i/o characteristics (untuned input) if output level [dbm] 20 rf input level [dbm] ?0 0 +10 ?0 ?0 ?0 ?0 ?0 ?0 ?0 ?0 ?0 0 10 f if = 45mh z f rf = 100mh z (vhf) cm ?cross modulation [db ] 120 reception frequency [mhz] 100 80 40 0 0 200 300 400 500 600 700 800 900 f ud = f d + 12mh z f ud = f d ?12mh z 100 20 60 next adjacent cross modulation vs. reception frequency (untuned input) f if = 45mhz interference signal: 100khz 30% am
?8 cxa1665am/am-s vhf input impedance j50 j100 j150 j250 ?50 ?100 ?150 ?250 ?25 ?10 0 j25 j10 50 50mhz 100mhz 200mhz 400mhz 4 5 6 7 8 1n s11 vhf in1 vhf in2 ic uhf input impedance j50 j100 j150 j250 ?50 ?100 ?150 ?250 ?25 ?10 0 j25 j10 50 600mhz 800mhz 400mhz 1n s11 uhf in2 uhf in1 ic 9 10 11 12 13
?9 cxa1665am/am-s if output impedance j50 j100 j150 j250 ?50 ?100 ?150 ?250 ?25 ?10 0 j25 j10 50 40mhz 50mhz 60mhz
?10 cxa1665am/am-s package outline unit: mm cxa1665am package structure package material lead treatment lead material package weight sony code eiaj code jedec code sop-16p-l01 * sop016-p-0300-a copper alloy solder plating epoxy resin 16pin sop (plastic) 300mil 9.9 ?0.1 + 0.4 16 9 18 1.27 0.45 0.1 5.3 ?0.1 + 0.3 7.9 0.4 6.9 1.85 ?0.15 + 0.4 0.5 0.2 0.2 ?0.05 + 0.1 0.1 ?0.05 + 0.2 0.2g 0.15 m 0.12 CXA1665AM-S sony code eiaj code jedec code sop-16p-l04 sop016-p-0300 package material lead treatment lead material package weight epoxy resin solder/palladium copper alloy package structure plating 0.1g 16pin sop(plastic) 0.1 0?to 10 detail a note: * ?dimensions do not include mold protrusion. 0.12 m 16 9 * 9.7 0.1 * 5.6 0.1 0.4 ?0.05 + 0.1 1.27 1 8 0.15 ?0.02 + 0.05 a 1.25 ?0.1 + 0.2 0.5 0.2 0.1 0.1 7.6 0.2
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