SA1021 hangzhou?silan?microelectronics?co.,ltd ?rev:2.0???????2004.07.31 http:?www.silan.com.cn???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?7 fm?radio?receiver?for?portable?system sop-16-225-1.27 ordering?information part?no. package SA1021 sop-16-225-1.27 description the? SA1021 ? integrated? radio? receiver? circuit? is? for? portable? radios, stereo?as?well?as?mono,?where?a?minimum?of?periphery?is?important?in terms? of? small? dimensions? and? low? cost.? it? is? fully? compatible? for applications?using?the?low- voltage?micro?tuning?system?(mts).?the?ic has? a? frequency? locked? loop? (fll)? system? with? an? intermediate frequency? of? 76khz.? the? selectivity? is? obtained? by? active? rc? filters. the? only? function? to? be? tuned? is? the? resonant? frequency? of? the oscillator. interstation? noise? as? well? as? noise? from? receiving? weak signals?is?reduced?by?a?correlation?mute?system. ????special? precautions? have? been? taken? to? meet? local? oscillator radiation? requirements.? because? of? the? low? intermediate? frequency, low? pass?filterin g? of? the? mux? signal? is? required? to? avoid? noise? when receiving?stereo.?50khz?roll- off?compensation,?needed?because?of?the low?pass?characteristic?of?the?fll,?is?performed?by?the?integrated?lf amplifier.? for? mono? application? this? amplifier? can? be? used? to? dir ectly drive? an? earphone.? the? field-strength? detector? enables?field- strength dependent?channel?separation?control. features *?rf?input?stage ?*?local?oscillator ?*?frequency?detector ?*?mts?compatible ?*?internal?reference?circuit ?*?field-strength?dependent?channel?separation?control?facility. *??mixer *??if?amplifier/limiter *??mute?circuit *??loop?amplifier *??lf?amplifier?for??mono?earphone ???amplifier?or?mux?filter block?diagram rf mix amp buffer if?filter vco mute af amp if?limiter demodulation stab 16 14 15 2 1 3 4 9 6 8 7 10 11 12 13 5 osc clim fig.1???block?diagram
SA1021 hangzhou?silan?microelectronics?co.,ltd ?rev:2.0???????2004.07.31 http:?www.silan.com.cn???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?7 absolute?maximum?ratings characteristics symbol min. max. unit supply?voltage(pin?4) v p =?v4-3 -- 7.0 v oscillator?voltage v 5-4 v p-0.5 v p+0.5 v operating?ambient?temperature?range t amb -10 +70 c storage?temperature?range t stg -55 +150 c quick?reference?data characteristics symbol conditions min. typ. max. unit supply?voltage?(pin?4) v p =?v 4-3 1.8 -- 6.0 v supply?current i 4 -- 6.3 -- ma rf?input?frequency f rf 1.5 -- 110 mhz sensitivity?(e.m.f.)?for??3?db?limiting e mf -- 4 -- m v signal?handling?(e.m.f.) e mf -- 200 -- mv af?output?voltage v o v p =3v sourceimpedance=75 w ;mut e?disabled source?impedance=75 w -- 90 -- mv thermal?resistance from?junction?to?ambient????????????????????????????????????????????????????????????????rth?j-a??300??k/w dc?electrical?characteristics (t amb =25 c,v p =3v?,?unless?otherwise?specified) characteristics symbol test?conditions min. typ. max. unit supply?voltage(pin?4) v p =?v4-3 -- 1.8 3.0 6.0 v supply?current i 4 v p =3v -- 6.3 -- ma oscillator?current i 5 -- -- 250 -- m a voltage?at?pin?13 v 13-3 -- -- 0.9 -- v output?voltage(pin?14) v 14-3 -- -- 1.3 -- v ac?electrical?characteristics(mono?operation) t amb =25 c,?v p =3v,mea?sured?in?fig.5, f rf =96mhz?modulated?with d f= 22.5khz,?fm=1khz,?e mf =0.3mv?(e.m.f.?at?a?source?impedance?of?75 w ),??r.m.s. noise?voltage?measured?unweighted?(f=300hz?to?20khz),?unless?otherwise?specified characteristics symbol test?conditions min. typ. max. unit for??3?db?limiting e mf -- 4.0 -- m v for??3?db?muting e mf -- 5.0 -- m v sensitivity (e.m.f.) for?(s+n)/n=26db e mf see?fig.3 muting?disabled -- 7.0 -- m v signal?handling?(e.m.f.) e mf thd<10%, d f= 75khz -- 200 -- mv signal-to-noise?ratio (s+n)/n? -- -- 60 -- db d f=22.5khz -- 0.7 -- % total?harmonic?distortion t hd d f= 75khz -- 2.3 -- % ? to?be?continued ?
SA1021 hangzhou?silan?microelectronics?co.,ltd ?rev:2.0???????2004.07.31 http:?www.silan.com.cn???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?7 ?(continued) characteristics symbol test?conditions min. typ. max. unit am?suppression?of?output?voltage a ms ratio?of?am?signal (fm=1khz;?m=80%?)?to?fm signal?(fm=1khz; d f= 75khz) -- 50 -- db ripple?rejection r r d v p =100mv,?f=1khz -- 30 -- db oscillator?voltage?(r.m.s.?value) ?v 5-4 (rms) -- -- 250 -- mv variation?of?oscillator?frequency with?temperature d f osc / d t amb v p =?1v -- 5 --? khz/ c s+300 -- 46 -- db selectivity s-300 see?fig.9 no?modualtion -- 30 -- db afc?range d frf -- -- 160 -- khz mute?range d frf -- -- 120 -- khz audio?bandwidth b d v o =3db,measured?with 50 m s?pre-emphasis -- 10 -- khz af?output?voltge(r.m.s.?value) v o (rms)? r l (pin?14)=100 w -- 90 -- mv max.d.c.?load i o (dc)? -- -100 -- +100 m a af?output max.a.c.?load?(peak value) i o (ac)? t hd =10% -- 3 -- ma fig.2?supply?current?as?a?function??of?the?supply voltage fig.3?field?strength?voltage?(v9-3)?at?rsource=1k w ; f=96.75mhz;vp=3v fig.4?mono?operation:?af?output?voltage?(vo)?and?total harmonic?distortion?(thd)?as?functions?of?input?e.m.f. (emf);?rsource=75 w ;?frf=96mhz;?0db=90mv.?for?s+n?and noise?curves?(1)?is?with?muting?enabled?and?(2)?is?with muting?disabled;??signal d f= 22.5khz?and?fm=1khz. for?thd?curve, d f= 75khz??and?fm=1khz.
SA1021 hangzhou?silan?microelectronics?co.,ltd ?rev:2.0???????2004.07.31 http:?www.silan.com.cn???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?7 ?fig.6? stereo? operation:? signal/noise? and? channel separation? of? SA1021? when? used? in? the? circuit? of fig.8. ?fig.7? stereo? operation:? channel? separation? as? a function?of?audio?frequency?in?the?circuit?of?fig.8. test?and?application?circuits fig.5?test?circuit?for?mono?operation. ac?electrical?characteristics(stereo?operation) t amb =25 c;?vp=3v;?measured?in?fig.8; frf=96mhz? ? modulated? with? pilot d f= 6.75khz? ? and? af? ? signal d f= 22.5khz;? fm=1khz;? emf=1mv(e.m.f.? at? a source? impedance? of? 75 w );? r.m.s.? noise? voltage? measured? unweighted? (f=300hz? to? 20khz);? unless? otherwise specified. characteristics symbol test??conditions min. typ. max. unit sensitivity?(e.m.f.) for?(s+n)/n=26db emf? see?fig.8,pilot?off -- 11 -- m v s+300 -- 40 -- db selectitvity s-300 see?fig.9.no?modulation -- 22 -- db signal-to-noise?ratio (s+n)/n? -- -- 50 -- db a at?frf?=97mhz -- 26 -- db channel?separation a vi=l-signal; fm=1khz,pilot?on: at?frf?=87.5mhz and?108mhz -- 14 -- db
SA1021 hangzhou?silan?microelectronics?co.,ltd ?rev:2.0???????2004.07.31 http:?www.silan.com.cn???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?7 test?and?application?circuit fig.8:? stereo? application? in? combination? with? a? low? voltage? pll? stereo? decoder? (utc7040)? and? a? low? voltage mono/stereo?power?amplifier?(utc7050). fig.9??test?set-up;?vi=30mv;?fi=76khz;??selective?voltmeter?at?output?has?ri 3 1m w ?and?ci 8pf;?fo=fi. this?test?set-up?is?to?incorporate?the?circuit?of?fig.5?for?mono?operation?or?the?circuit?of?fig.8?for?stereo?operation. for?either?circuit,?replace?the?100 m f?capacitor?at?pin?6?with?r6(100k w )?as?shown?above. selectivity s+300=20 fi | vo fi) - (300khz | vo ??????????????????????????????????????????????s-300=20 fi | vo fi) (300khz | vo +
SA1021 hangzhou?silan?microelectronics?co.,ltd ?rev:2.0???????2004.07.31 http:?www.silan.com.cn???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?7 package?outline sop-16-225-1.27 unit:?mm
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