KA22901 am/fm tuner + mpx introduction the KA22901 is a monolithic intergrated circuit which consists of one chip tuner and no adjustment fm multiplex for am/fm ra- dios and headphone radios. features one chip tuner with built - in fm multiplex no adjustment for fm detector and vco. no am detect coil, if coupling capacitor, fm if bypass capacitor needed. built-in am/fm selection switch. minimum number of external parts required. wide operating voltage range : v cc = 1.8v ~ 7v low distortion (fm if : 0.4%, am if : 1%, 0.2% (typ) ). block diagram 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 am f/e fm f/e am/fm det osc stereo decoder lamp trugger ff agc am if fm if led driver af buffer phase detector fm rf in gnd fm mix am mix agc vcc am if fm if gnd tuning led st led quad det am rf in fm rf out rf vcc fm osc am osc det out mpx in ph1 ph2 osc l-ch out r-ch out fig. 1 ordering information device package operating temperature KA22901 24-sdip-300 -20 c ~ +75 c KA22901d 24-sop-375 24-sop-375 24-sdip-300
KA22901 am/fm tuner + mpx absolute maximum ratings (ta = 25 c) characteristic symbol value unit supply voltage power dissipation operating temperature storage temperature led driver voltage led driver current v cc p d t opr t stg v dr i dr 8 1200 -20 ~ +75 -55 ~ +150 10 10 v mw c c v ma elecrtrical characteristics (ta = 25 c, v cc = 3v, unless otherwise specified) fm f/e : f = 98mhz, fm = 1khz, d f = 22.5khz am : f = 1khz, 30% mod fm if : f = 10, 7mhz, fm = 1khz, d f = 22.5khz mpx : f = 1khz, l + r = 90%, p = 10%, v i = 150mv characteristics symbol test condition min typ max unit test circuit quiescent circuit current i ccq1 fm, v i =0 10 14 18 ma 1 i ccq2 am, v i = 0 3.5 6.0 9 ma 1 f/e -3db limiting sensitivity v i (lim)1 v o = -3db 10 14 18 db m 1 oscillation voltage v osc f osc = 72.3mhz 70 105 140 mv 2 fm -3db limiting sensitivity v i(lim)2 v o = -3db 39 44 49 db m 1 if detector output voltage v o (det)1 v i = 80db m 55 80 110 mv 1 signal to noise ratio s/n 1 v i = 80db m 60 70 db 1 total hatmonic distortion thd 1 v i = 80db m 0.4 1 % 1 am rejection ratio amr v i = 80d m 40 50 db 1 tuning indication voltage v li i led = 1ma 39 44 49 db 1 voltage gain g v1 v i = 23db m 20 40 80 mv 1 am detector output voltage v o(det)2 v i = 60db m 50 60 100 mv 1 if signal to noise ratio s/n 2 v i = 60db m 34 44 db 1 total harmonic distortion thd 2 v i = 60db m 1 2 % 1 tuning indication voltage vl 2 i led = 1ma 19 24 30 db m 1 maximum input voltage v i(max) stereo, thd = 3% 250 350 mv 1 mpx cs 1 stereo, f = 100hz 35 42 db 1 channel separation cs 2 stereo, f = 1khz 35 42 db 1 cs 3 stereo, f = 10khz 35 42 db 1 total harmonic distortion thd 3 mono 0.2 1 % 1 thd 4 stereo 0.2 1 % 1 voltage gain g v2 mono -5 -3 -1 db 1 channel balance cb mono -2 0 2 db 1 lamp on level vl (on) pilot only 8 16 mv 1 vl (off) pilot only 2 6 mv 1 lamp hysteresis hy 2 mv 1 capture range cr pilot only 3 % 1 signal to noise ratio s/n 3 mono 60 70 db 1
KA22901 am/fm tuner + mpx 1 2 3 4 5 6 7 8 9 10 11 12 23 22 21 20 19 18 17 16 15 14 13 24 KA22901 bpf ~ ~ + ~ lpf + + ~ + fc + 24k det out 2.2u fm am 333 6800p 223 2.2k 2.2mh l1 l2 333 15p t1 330p st mono 683 22k 3.3u 823 am fm csb456f16 4.4u 4.4u 103 103 l-ch out r-ch out vcc 104 220u 10u mpx in 76khz 220k 10.7mhz 560 560 10.7mhz cf 10.7mhz 333 33u t2 75 10.7mhz 75 270 fm-if in fm-if in am-if in 75 75 fig. 2 1 2 3 4 5 6 7 8 9 10 11 12 23 22 21 20 19 18 17 16 15 14 13 24 KA22901 + + 333 333 80p 15p l2 100u vcc 470k 470k 5p 1k 0.01u 220u fm osc power 8v ksk161 fig. 3
KA22901 am/fm tuner + mpx 3 2 1 4 5 6 3 2 1 4 5 6 3 2 1 4 5 6 3 2 1 4 5 6 l1 fm rf l2 fm osc t1 am osc t2 am ift (mix out) coil specification f (mhz) qo turns 1-4 100 100 2 1/2 0.5mm f (mhz) qo turns 1-3 100 100 2 3/4 0.5mm f (mhz) qo turns 1-3 796 115 13 korea toko 0.08mm 73 2-3 l (uh) 288 f (mhz) qo turns 1-3 180 455 120 korea toko 0.08mm 180 4-6 15 co (pf) 1-3
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