device operating temperature range package semiconductor technical data cquam advanced medium voltage am stereo decoder ordering information MC13022Ap MC13022Adw t a = 40 to +85 c plastic power so28l p suffix plastic package case 710 28 1 (top view) pin connections order this document by MC13022A/d dw suffix plastic package case 751f (so28l) 28 1 722 21 20 19 18 17 16 15 8 9 10 11 12 13 14 filtered left out left notch in feedback feedback right notch in filtered right out gnd cmos ss out unfiltered l out unfiltered r out stereo lamp osc feedback i pilot q pilot osc in pilot det in 128 27 26 25 24 23 2 3 4 5 6 env det decoder input ref ss i det agc if input lr det q out blend v cc loop filter 1 motorola analog ic device data
the MC13022A is designed for home and automotive am stereo radio applications. the circuits and functions included in the design allow implementation of a fullfeatured cquam ? am stereo radio with relatively few, inexpensive external parts. it is available in either 28lead dip or eiaj compatible widebodied 28lead soic. functionally, the MC13022A and mc13022 are very similar. the MC13022A has 10 db more audio output and a cmos compatible logic level output (pin 15) for stop sense. the stop sense/agc function has been internally connected to the output notch filter control. ? operation from 6.0 v to 10 v supply with current drain of 20 ma typ ? if amplifier with two speed agc ? post detection filters that allow automatic adjustable audio bandwidth control and notch filtering (9.0 or 10 khz) ? signal quality controlled stereo blend and noise reduction ? noise and cochannel discriminating stoponstation ? signal strength indicator output for stop sense and/or meter drive ? signal strength controlled if and audio bandwidth ? noise immune pilot detector needs no precision filter components ? mc13025 complementary electronically tuned radio front end ? cmos compatible driver for stop sense cquam is a registered trademark of motorola, inc. the purchase of the motorola cquam ? am stereo decoder does not carry with such pur- chase any license by implication, estoppel or otherwise, under any patent rights of motorola or others covering any combination of this decoder with other elements including use in a radio receiver. upon application by an interested party, licenses are available from motorola on its patents applicable to am stereo radio receivers. simplified application 450 khz lowlevel if if amp agc if i q decoder post det filter l r left audio right audio blend, cos q , fastlock conrol pilot detector pilot lamp cmos (logic) signal quality detector yes/no level fast agc control signal strength control of audio filters this document contains information on a new product. specifications and information herein are subject to change without notice. ? motorola, inc. 1996 rev 1
MC13022A 2 motorola analog ic device data maximum ratings rating symbol value unit power supply input voltage v cc 12 vdc stereo indicator lamp current (pin 21) 30 madc operating ambient temperature t a 40 to +85 c storage temperature range t stg 65 to +150 c operating junction temperature t j(max) 150 c power dissipation derate above 25 c p d 1.25 10 w mw/ c note: esd data available upon request. electrical characteristics (v cc = 8.0 v, t a = 25 c, test circuit of figure no tag, unless otherwise noted.) characteristic min typ max unit power supply operating range 6.0 8.0 10 vdc supply line current drain (pin 25) 10 20 25 madc minimum input signal level, unmodulated for full operation (pin 5) 5.0 mvrms audio output level, 50% modulation, l only or r only (pins 10, 11) 290 400 530 mvrms stereo audio output level, 50% modulation (pins 10, 11) 140 200 265 mvrms monaural output thd, 50% modulation % monaural 0.3 0.8 stereo 0.5 1.6 channel separation, l only or r only, 50% modulation 22 35 db stereo pilot acquisition time following blend reset to 0.3 vdc 600 ms audio output impedance at 1.0 khz (pins 7, 14) 300 w stereo indicator lamp pin saturation voltage at 3.0 ma load current (v sat pin 21) 200 mvdc stereo indicator lamp pin leakage current (pin 21) 1.0 m adc oscillator capture range 3.0 khz
MC13022A 3 motorola analog ic device data figure 1. test circuit 16 stop sense, ss meter v cc 3.0 k 2.2 k 0.33 + 0.68 0.001 0.001 0.001 28 27 26 25 24 23 22 21 20 19 18 17 15 12 345 67 891011121314 i det lr det q out v cc loop filt blend gnd stereo lamp osc fbk osc in pilot det input pilot i pilot q stop sense + + led t1 3.9 k .001 51 + 0.47 decoder signal quality detector vco pilot detector matrix gaincontrolled lr envelope l+r signal strength output if out if/agc 3.0 v env det decoder input ref agc 0.001 10 m f + 0.01 10 k if input 100 k 0.01 filtered left output 43 k 43 k 740 21.5 k 370 370 370 370 43 k 43 k 740 21.5 k filtered right output 10 m f 47 m f 20 m f notes: 1. q1 is switched on when the blend pin 23 is externally held low and the signal is weak or has 110% negative modulation. in this condition q1 pulls pin 6 low (0.25 to 1.3 v). at all other times, pin 6 follows the curve in figure no tag. 2. q2 (pin 15) is switched on when pin 6 voltage is below 1.7 v. q2 could then be used as a logic output to the tuning system, telling the tuning system to continue searching for a good signal. 3. user is cautioned not to require more than 1.0 ma from pin 6. 47 k logic v cc (5.0 v) to cmos logic from tuning system r output l output buffer filter amp buffer filter amp 1.0 k q2 1.7 v ref q1 + 10 m f 13 k 120 l2 1.0 mh t1 ceramic resonator murata t1 csa 3.60 mgf103 l2 miller 923092
MC13022A 4 motorola analog ic device data explanation of features blend and noise reduction although am stereo does not have the extreme difference in s/n between mono and stereo that fm does (typically less than 3.0 db versus greater than 20 db for fm), sudden switching between mono and stereo is quite apparent. some forms of interference such as cochannel have a large lr component that makes them more annoying than would ordinarily be expected for the measured level. the MC13022A measures the interference level and reduces lr as interference increases, blending smoothly to monaural. the pilot indicator remains on as long as a pilot signal is detected, even when interference is severe, to minimize annoying pilot light flickering. signal strength a dc voltage proportional to the log of signal strength is provided at pin 6. this can be used for signal strength indication, and it directly controls the post detection filter. normal operation is above 2.2 v as shown is figure no tag. stop sense the signal strength information is multiplexed with the stop sense signal. the stop sense is activated when scanning by externally pulling the blend, pin 23, below 0.3 v. this would typically be done from the mute line in a frequency synthesizer. if at any time pin 23 is low and there is either no signal in the if or a noisy signal of a predetermined interference level, pins 6 and 15 will go low. this low can be used to tell the frequency synthesizer to immediately scan to the next channel. the interference detection prevents stopping on many unlistenable stations, a feature particularly useful at night when many frequencies may have strong signals from multiple cochannel stations. pin 6 drives a comparator which has a 1.7 v reference. therefore the comparator output, pin 15, is low if pin 6 is <1.7 v and high if pin 6 is >1.7 v. if bandwidth control if agc attenuates the signal by shunting the signal at the if input. this widens the if bandwidth by decreasing the loaded q of the input coupling coil as signal strength increases. post detection filtering with weak, noisy signals, high frequency rolloff greatly improves the sound. conventional tone controls do not attenuate the highs sufficiently to control noise without also significantly affecting the midrange. also, notch filters are necessary with any wideband am radio to eliminate the 10 khz whistle from adjacent stations. by using a twint filter with variable feedback to the normally grounded center leg, a variable q notch filter is formed that provides both the 10 khz notch and variable high frequency rolloff functions. typical range of response is shown in figure no tag. response is controlled by pin 6 for automatic audio bandwidth control as a function of signal strength.
MC13022A 5 motorola analog ic device data l out 10 ss 6 v cc toko part no. mf292bc1349z 28 i det 27 lr det 26 q out 25 v cc 24 loop filter 23 blend 22 gnd 21 stereo lamp 20 osc feedbk 19 osc in 18 pilot det in 17 i pilot 16 q pilot 15 cmos ss out see mc13025 data sheet for alternate approach loop stick mixer oscillator if 450 khz to signal strength meter tuning line from synthesizer toko part no. thb122 env det 1 decoder input 2 ref 3 agc 4 if input 5 out 7 left notch in 8 fbk 9 r out 11 fbk 12 right notch in 13 out 14 MC13022A figure 2. high performance home type am stereo receiver from mute line unfiltered to tuning system 3.9 k t1 51 .001 logic v cc (5.0 v) t2 t1 ceramic resonator murata t1 csa 3.60 mgf103 t2 broad resonance @ 450 khz t2 effective r p of 8.0 k to 12 k t2 (toko 7nrest13704) figure 3. overall selectivity of a typical receiver versus filter control voltage figure 4. strength output versus input signal 60 overall response (db) audio frequency (khz) 0 10 20 30 40 50 70 80 1.5 2.0 3.0 4.0 5.0 6.0 8.0 10 15 20 30 v pin 6 = 3.5 vdc 2.5 vdc 1.5 vdc response at pins 10 and 11 due to if selectivity total response at output pins 7 and 14 stop sense, ss meter, pin 6 (vdc) signal input, 10 k w to pin 5 (mvrms) 5236 signal input 10 k 0.01 100 k 0.01 ss meter 4.0 3.0 2.0 1.0 3.0 10 30 100 300 1.0 k z o = 13 k 5.0
MC13022A 6 motorola analog ic device data p suffix plastic package case 71002 issue b dw suffix plastic package case 751f04 (so28l) issue e outline dimensions notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.13 (0.005) total in excess of d dimension at maximum material condition. j k f 1 15 14 28 a b 28x 14x d p s a m 0.010 (0.25) b s t m 0.010 (0.25) b m 26x g t seating plane c x 45 r m dim min max min max inches millimeters a 17.80 18.05 0.701 0.711 b 7.40 7.60 0.292 0.299 c 2.35 2.65 0.093 0.104 d 0.35 0.49 0.014 0.019 f 0.41 0.90 0.016 0.035 g 1.27 bsc 0.050 bsc j 0.23 0.32 0.009 0.013 k 0.13 0.29 0.005 0.011 m 0 8 0 8 p 10.01 10.55 0.395 0.415 r 0.25 0.75 0.010 0.029 notes: 1. positional tolerance of leads (d), shall be within 0.25 (0.010) at maximum material condition, in relation to seating plane and each other. 2. dimension l to center of leads when formed parallel. 3. dimension b does not include mold flash. 1 seating plane 15 14 28 m a b k c n f g d h j l dim min max min max inches millimeters a 36.45 37.21 1.435 1.465 b 13.72 14.22 0.540 0.560 c 3.94 5.08 0.155 0.200 d 0.36 0.56 0.014 0.022 f 1.02 1.52 0.040 0.060 g 2.54 bsc 0.100 bsc h 1.65 2.16 0.065 0.085 j 0.20 0.38 0.008 0.015 k 2.92 3.43 0.115 0.135 l 15.24 bsc 0.600 bsc m 0 15 0 15 n 0.51 1.02 0.020 0.040
MC13022A 7 motorola analog ic device data motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. atypicalo parameters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer.
MC13022A 8 motorola analog ic device data how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : nippon motorola ltd.; tatsumispdjldc, 6f seibubutsuryucenter, p.o. box 20912; phoenix, arizona 85036. 18004412447 or 6023035454 3142 tatsumi kotoku, tokyo 135, japan. 038135218315 mfax : rmfax0@email.sps.mot.com touchtone 6 022446609 asia / pacific : motorola semiconductors h.k. ltd.; 8b tai ping industrial park, internet : http://designnet.com 51 ting kok r oad, tai po, n.t., hong kong. 85226629298 MC13022A/d
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