unisonic technologies co., ltd cxa1191 linear integrated circuit www.unisonic.com.tw 1of 7 copyright ? 2009 unisonic technologies co., ltd qw- r110-014.b fm/am radio ? description the utc cxa1191 is a one-chip fm/am radio ic designed for radio-cassette tape recorders and headphone tape recorders. ? features *small number of peripheral components *low current consumption (vcc=3v) ? fm: l d =5.3ma (typ.) ? am: l d =3.4ma (typ.) *built-in fm/am select switch *large current of af amplifier ? functions fm section rf amplifier, mixer and osc (incorporating afc variable capacitor) if amplifier quadrature detection tuning led driver am section rf amplifier, mixer and osc (with rf agc) if amplifier (with if agc) detector tuning led driver af section electronic volume control fm muting structure bipolar silicon monolithic ic lead-free: cxa1191l halogen-free:cxa1191g ? ordering information ordering number normal lead free plating halogen free package packing CXA1191-D28-T cxa1191l-d28-t cxa1191g-d28-t dip-28 tube cxa1191-s28-r cxa1191l-s28-r cxa1191g-s28-r sop-28 tape reel cxa1191-s28-t cxa1191l-s28-t cxa1191g-s28-t sop-28 tube
cxa1191 linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw- r110-014.b ? pin configurations voltage(v) v cc =3v v cc =6v pin description symbol fm am fm am equivalent circuit 1 mute 0 0 0 0 2 phase-shift circuit, connect ceramic discriminator. fm discri 2.18 2.7 4.88 5.43 3 negative feedback pin nf 1.5 1.5 3.0 3.0 27 power amplifier output pi n af out 1.5 1.5 3.0 3.0 3 27 x100 x100 gnd vcc 4 connect variable resistor for electronic volume control. vol cont 1.25 1.25 1.25 1.25 5 am local oscillation circ uit am osc 1.25 1.25 1.25 1.25 6 afc variable capacitor pin afc 1.25 note 1.25 note 8 regulator pin 1.25v (typ.) reg out 1.25 1.25 1.25 1.25 7 fm local oscillation circuit fm osc 1.25 1.25 1.25 1.25 9 connect fm rf tuning coil. fm rf 1.25 1.25 1.25 1.25 12 fm rf input pin fm rf in 0.3 0 0.3 0 10 am rf input am rf in 1.25 1.25 1.25 1.25 11 nc 0 0 0 0 13 gnd (fe gnd) 0 0 0 0
cxa1191 linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw- r110-014.b ? pin configurations(cont.) voltage(v) v cc =3v v cc =6v pin description symbol fm am fm am equivalent circuit 14 if output pin of fm and am, connect if filter fm/am fe out 0.36 0.2 0.36 0.2 15 fm and am bands selection switch pin. during gnd it becomes am and during open it becomes fm. band select 0.84 0 0.88 0 15 10k vcc gnd 16 input pin of am if am if in 0 0 0 0 16 2k 17 input pin of fm if fm if in 0.34 0 0.88 0 18 nc 0 0 0 0 19 meter drive circuit (for tuning indicator) meter 1.6 1.6 4.5 4.5 19 gnd n 1.25v 20 gnd 0 0 0 0 21 afc pin of w band. during am, it determines time constant of agc. afc/agc 1.25 1.49 1.25 1.49 22 afc pin of j band. during am, it determines time constant of agc. afc/agc 1.25 1.25 1.25 1.25 23 detection output pin det out 1.25 1.0 1.25 1.0 22 gnd 21 24 power amplifier input pin af in 0 0 0 0 24 gnd 11k 25 ripple filter ripple filter 2.71 2.71 5.4 5.4
cxa1191 linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw- r110-014.b ? pin configurations(cont.) voltage(v) v cc =3v v cc =6v pin description symbol fm am fm am equivalent circuit 6 power supply pin v cc 3.0 3.0 6.0 6.0 28 power gnd gnd 0 0 0 0 note: the pin voltage of pin 6 during am, it is the same pin voltage of pin22 (23) during j band and is the same pin voltage of pin 21 (22) during w band.
cxa1191 linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw- r110-014.b ? block diagram 28 27 26 25 24 23 20 18 22 21 19 17 16 15 1 3 4 5 6 9 11 7 8 10 12 13 14 af power amp am if det agc tuning meter am fe fm discriminator fm fe fm if mute fm discri nf vol am osc afc fm osc rug out fm rf am rf in nc fw rf in fm gnd fm/am if out gnd af out vcc ripple filter af in det out afc aqc afc aqc if end meter nc fm if in am if in fm/am band select 2
cxa1191 linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw- r110-014.b ? absolute maximum ratings (t a =25 c) parameter symbol ratings unit supply voltage v cc 9 v dip-28 1000 mw power dissipation sop-28 p d 700 mw junction temperature t j +150 c operating temperature t opr -20 ~ +85 c storage temperature t stg -40 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating conditions parameter symbol ratings unit dip-28 2 ~ 8.5 v supply voltage sop-28 v cc 2 ~ 7.5 v ? electrical characteristics (ta=25 c, vcc=6v) sw conditions parameter symbol 1 2 3 4 5 6 test point conditions min typ max unit am circuit current i d1 a b a a a a i a no signal, am - 3.5 10.0 ma fm circuit current i d2 a b a a b a i a no signal, fm - 7.0 14.0 ma fm front end voltage gain g v1 a b a a b a va v in1 =40dbv,100mh z 32 39 46 db fm detection output level v d1 a - - a b a v d v in3 =90dbv,10.7 mh z (1 khz,22.5khz dev) 39 77.5 155 vrms fm if knee level v d2 a - - a b a v d v in3 level at a point 3 db down from v in3 =90dbv,10.7 mh z (1 khz,22.5khz dev) - 24 32 db v fm detection output distortion factor thd1 a - - a b a v d v in3 =90dbv,10.7 mh z (1 khz,75khz dev) - 0.3 2.0 % fm meter current i b1 a - - a b a i m v in3 =60dbv,10.7 mh z 1.8 3.5 7.0 ma am front end voltage gain g v2 a a a a a a v b v in3 =60dbv,1660 kh z 15 22 29 db am if voltage gain g v3 a a - a a a v d v in3 w hen 455khz (1khz, 30% mod) output is ? 34dbm 14 20 27 dbv am detection output level v d3 a a - a a a v d v in3 =85dbv,455kh z (1khz, 30% mod) 39 77.5 155 vrms am meter current i b2 a a - a a a i m v in3 =85dbv,455kh z (1khz, 30% mod) 1.3 3.0 7.0 ma am detection output distortion factor thd2 a a b b a a v d v in2 =60dbv,1660kh z (1khz, 30% mod),vcc=7,8v - 0.6 2.0 % audio voltage gain g v4 a - - - - b v e v in3 =60dbv,10.7mh z v in4 =-30dbv,1kh z 27 31.5 36 db audio distortion factor thd3 a - - - - b v e distortion factor for output of 50mvv v in3 =60dbv,10.7mh z v in4 =-20db m,1kh z - 0.3 2.5 % muting level v d4 a - - - - b v e muting level for 50 mw output v in4 =-20dbm,1kh z v in3 off 8 15 22 db 0dbv=1v
cxa1191 linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw- r110-014.b ? application circuit utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, oper ating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in lif e support appliances, devices or systems where malfunction of these products can be reasonably expe cted to result in personal injury. reproduction in whole or in part is prohibited without the prior writ ten consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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