NJM2536A - 1 - rf modulator for vhf band ? ? ? ? description the NJM2536A is a rf modulator ic especially designed for vhf band rf modulator and consists of video clamp circuit, white clip circuit, video am modulator and audio fm modulator, built into one chip. ? ? ? ? features ? operating voltage 5v ? picture-to-sound ratio is adjustable ? vhf oscillator on chip ? carrier-off switch function on chip ? regulator on chip ? bipolar technology ? package outline:dmp/ssop14 ? ? ? ? block diagram ? ? ? ? package outline NJM2536Av NJM2536Am vc c ch sw ch2 ch1 gnd2 reg out 4.5mhz tank video in ca rrier ant sw rf out gnd1 p/ s audio in 12 34 567 8 14 13 12 11 10 9 rf osc regula tor driv e off sw cla mp & mixer ca rrier off sw audio fm modul a tor white clip
NJM2536A - 2 - ? ? ? ? absolute maximum ratings (t a =25c) parameter symbol ratings unit supply voltage v cc 7 v power dissipation p d 300 mw input voltage v i -0.3 to v cc v operating temperature range t opr -20 to +75 c storage temperature range t stg -40 to +125 c ? ? ? ? recommended operating voltage range (t a =25c) parameter condition symbol min. typ. max. unit operating voltage v cc 4.5 5.0 5.5 v ? ? ? ? electrical characteristics (v cc =5v,t a =25c) parameter condition symbol min. typ. max. unit operating current no video/audio input signal, carrier off sw(pin2)=5v i cc 13.5 16.0 22.5 ma ant sw drive output voltage ?1 carrier off sw(pin2)=5v i d =26ma v ant1 3.7 4.0 4.3 v ant sw drive output voltage ?2 carrier off sw(pin2)=open v cc =2v v ant2 0 0.065 0.1 v video output level (note 1) video input signal(pin1)=0.5v pp v o (83) 86 (89) dbu video modulation depth (note 1) video input signal(pin1)=0.5v pp mp (70) 76 (82) % video limiter modulation depth (note 1) video input signal(pin1)=1.0v pp mpmax (85) 94 (98) % differential gain video input signal(pin1)=0.5v pp staircase dg - 3 - % differential phase video input signal(pin1)=0.5v pp staircase dp - 3 - deg picture-to-sound ratio (note 1) video input signal(pin1)=0.5v pp ps (11) 13 (15) db sound fm modulation sensitivity deviation of fs per 100mv b - 0.51 - khz/mv audio distortion audio input signal(pin7)=0.05v pp 1khz sine wave thd - 0.3 - % audio signal-to-noise ratio sound modulation 60% 1khz sine wave asn - 60 - db maximum sound fm modulation audio input signal(pin7)=1.0v pp 1khz sine wave msmax - 700 - % (note 1) because ac characteristics largely depends on application circuit, these parameters are specified by the dc characteristics as shown in next page.
NJM2536A - 3 - ? ? ? ? dc electrical characteristics (v cc =5v,pin2=2.5v, t a =25c, otherwise noted. all measurements performed in the dc test circuit are shown in next page) parameter condition (note 2) symbol min. typ. max. unit video output signal amplitude 1 gvv1=gvvh1-gvvl1 gvv1 62.4 85 124.5 mv video output signal amplitude 2 gvv2=gvvh2-gvvl2 gvv2 62.4 85 124.5 mv video modulation depth mp=((gvv1-mw)/gvv1)x100 where mw=mwh-mwl mp 70 76 82 % video limiter modulation depth (note 2) mpmax=((gvv1-wc)/gvv1)x100 where wc=wch-wcl mpmax 85 94 98 % picture-to-sound ratio ps=psh-psl ps -70 -45 -35.1 mv (note 2) explanation of symbols ? vv : video in output voltage at pin1 ? v11h : ch1 output voltage at pin11 ch sw (pin13) input = 2.5v ? v12h : ch1 output voltage at pin12 ch sw (pin13) input = 0.5v ? gvvh1: rf out output voltage at pin4 video in (pin 1) input = vv, ch1 (pin11) = v11h + 0.15v, ch sw (pin13) input = 2.5v ? gvvl1 : rf out output voltage at pin4 video in (pin 1) input = vv, ch1 (pin11) = v11h - 0.15v, ch sw (pin13) input = 2.5v ? gvvh2 : rf out output voltage at pin4 video in (pin 1) input = vv, ch2 (pin12) = v12h + 0.15v, ch sw (pin13) input = 0.5v ? gvvl2 : rf out output voltage at pin4 video in (pin 1) input = vv, ch2 (pin12) = v12h - 0.15v, ch sw (pin13) input = 0.5v ? mwh : rf out output voltage at pin4 video in (pin 1) input = vv + 0.43v, ch1 (pin11) = v11h + 0.15v, ch sw (pin13) input = 2.5v ? mwl : rf out output voltage at pin4 video in (pin 1) input = vv + 0.43v, ch1 (pin11) = v11h - 0.15v, ch sw (pin13) input = 2.5v ? wch : rf out output voltage at pin4 video in (pin 1) input = vv + 0.8v, ch1 (pin11) = v11h + 0.15v, ch sw (pin13) input = 2.5v ? wcl : rf out output voltage at pin4 video in (pin 1) input = vv + 0.8v, ch1 (pin11) = v11h - 0.15v, ch sw (pin13) input = 2.5v ? vps : p/s output voltage at pin6 carrier off sw (pin 2) input = 2.5v ? psh : rf out output voltage at pin4 p/s (pin 6) input = vps + 0.2v, ch1 (pin11) = 2.4v, ch sw (pin13) input = 2.5v ? psl : rf out output voltage at pin4 p/s (pin 6) input = vps - 0.2v, ch1 (pin11) = 2.4v, ch sw (pin13) input = 2.5v
NJM2536A - 4 - ? ? ? ? ac test circuit ? ? ? ? dc test circuit + + 1u 1n 1n 1u 1n 68p vc c vc c vc c ch sw ch2 ch1 gnd2 reg out 4.5mhz tank vid eo in carrier off sw an t sw drive rf out gnd1 p/s audio in open ch1 ch2 10p 10p 1u 6p 1n + 0.1u 14 13 12 11 10 9 8 1 2 3 4 5 6 7 video in rf out audio in 75 + + 14 1u 1n 1n 1u 1n 1n 68p vcc vcc vc c 0.01 vc c ch sw ch2 ch1 gnd2 reg out 4.5mhz tank vid eo in carrier off sw an t sw drive rf out gnd1 p/s audio in 13 12 11 10 9 8 7 6 5 4 3 2 1
NJM2536A - 5 - ? ? ? ? terminal characteristics no. symbol typ. dc voltage (v) equivalent circuit function 1 video in 1.9 video signal input 2 carrier off sw - picture carrier-off switch 3 ant sw drive 4 (pin2=high) 0 (pin2=low) ant switch drive voltage output 4 rf out 4 rf signal output 5 gnd1 0 gnd terminal except for oscillator circuit 6 p/s 2.8 picture-to-sound ratio adjust 15 1 4 14 2 5 14 3 5 14 4 5 6 5
NJM2536A - 6 - no. symbol typ. dc voltage (v) equivalent circuit function 7 audio in 0.035 audio signal input 8 4.5mhz tank 2.9 4.5mhz tank coil for sound fm modulation circuit 9 reg out 4 regulator output 10 gnd2 0 gnd for oscillator circuit 11 ch1 2.24 (osc:on) 2.30 (osc:off) rf oscillator pin (base) 12 ch2 2.24 (osc:on) 2.30 (osc:off) rf oscillator pin (base) 14 8 5 14 9 5 14 11,12 5 5 7 14
NJM2536A - 7 - no. symbol typ. dc voltage (v) equivalent circuit function 13 ch sw 2.38 output channel select switch 14 vcc 5 power supply 14 5 13
NJM2536A - 8 - ? ? ? ? typical characteristics t a =25c 0 5 10 15 20 25 30 0.02.04.06.0 8.010.0 icc vs vcc icc [ma] vcc [v] 80 82 84 86 88 90 4.0 4.5 5.0 5.5 6.0 6.5 7.0 video output level vs vcc vo [dbu] vcc [v] 70 72 74 76 78 80 82 4.5 5.0 5.5 6.0 6.5 7.0 video modulation depth vs vcc mp [%] vcc [v] 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 4.0 4.5 5.0 5.5 6.0 6.5 7.0 audio fm modulation sensitivity vs vcc ?b [khz/mv] vcc [v]
m e m o [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
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