NTE1234 integrated circuit fm if amplifier description: the NTE1234 is designed for use in fm if and tv sound if amp applications. this device contains 3 different stage differential if amp and a differential peak detector function. features: excellent am rejection: (amr = 50db typ.) high sensitivity: (v in(lim) = 50db v typ.) operating supply voltage range: (v cc = 8 to 15v, thd = 0.2% typ.) high recovered output voltage: (v od = 430mv typ. 75khz, dev.) low distortion: (thd = 0.2% typ. 500mv typ. ? f = 75khz, dev.) absolute maximum ratings: (t a = +25 c, unless otherwise specified) supply voltage, v cc, 15v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage, v in 0.7vrms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . power dissipation (note 1), p d 400mw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating temperature range, t opg ? 20 to +75 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ? 55 to +125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . note 1. derate above +25 c in this proportion of 4/mw/ c. electrical characteristics : (t a = +25 c, v cc = 12v, unless otherwise specified) parameter symbol test conditions min typ max unit supply current i cc v in = 0 8 11 15 ma output terminal dc voltage (pin 7) v 7 v in = 0, short pin 5,6 4.0 4.8 5.5 v recovered output voltage v od f = 10.7mhz, f m = 400hz, ? f = 75khz dev., v in = 80db v 300 500 700 m v rms input limiting voltage v in(lim) f = 10.7mhz, f m = 400hz, ? f = 22khz dev., ? 3db limiting ? 50 55 db v total harmonic distortion thd f = 10.7mhz, f m = 400hz, ? f = 22khz dev., v in = 80db v ? 0.2 ? % signal to noise ratio s/n f = 10.7mhz, f m = 400hz, ? f = 22khz ? 0 khz v in = 80db v ? 60 ? db am rejection ratio amr f = 10.7mhz, f m = 400hz, v in = 80db v, fm: 75khz dev, am: 30% mod ? 50 ? db
electrical characteristics (cont?d) : (t a = +25 c, v cc = 12v, unless otherwise specified) parameter symbol test conditions min typ max unit output resistance r o f = 400mhz, pin 7 ? gnd 6.2 7.7 9.5 k ? input impedance parallel resistance r ip f = 10.7mhz, pin 1 ? gnd ? 5 ? k ? parallel capacitance c ip ? 4.5 ? pf output impedance parallel resistance r op f = 10.7mhz, pin 5 ? gnd ? 1.3 ? k ? parallel capacitance c op ? 4 ? pf pin connection diagram v cc detector tank circuit output gnd detector feedback 7 6 5 4 3 2 1 input 17 .700 (17.8) max .600 (15.24) .323 (8.2) max .100 (2.54) .012 (0.25) .128 (3.2) .099 (2.5) min
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