device operating temperature range package semiconductor technical data low power dual conversion fm receiver ordering information MC3335DW mc3335p t a = 40 to +85 c so20 plastic dip pin connections order this document by mc3335/d p suffix plastic package case 738 dw suffix plastic package case 751d (so20l) 11 7 8 12 20 9 10 19 18 17 16 1 14 13 2 3 4 5 615 limiter 1st lo tank 1st mixer output 1st lo tank v cc 2nd mixer input v ee comparator output comparator input detector output 1st mixer input quadrature coil 2nd lo emitter 2nd lo base 2nd mixer output limiter input limiter decoupling meter drive limiter decoupling carrier detect 1st mixer input 1 motorola analog ic device data
. . . includes dual fm conversion with oscillators, mixers, quadrature discriminator, and meter drive/carrier detect circuitry. the mc3335 also has a comparator circuit for fsk detection. ? complete dual conversion circuitry ? low voltage: v cc = 2.0 to 6.0 vdc ? low drain current (typical 3.6 ma with v cc = 3.0 vdc) ? excellent sensitivity: 3.0 db input limiting = 0.7 m v ? externally adjustable carrier detect function ? separate data shaping output circuitry ? data rate up to 35000 baud detectable ? 60 db rssi range ? low number of external parts required ? manufactured in motorola s mosaic ? process technology ? mc13135 is preferred for new designs simplified application as a fixed receiver limiter 0.01 33 pf 39 k ceramic filter 10.7 mhz 120 pf + 0.1 0.1 v cc 0.01 l p c p 0.1 v cc 10 k 50 pf ceramic filter 455 khz to carrier detect indicator rf input 49.7 mhz 15 0.1 6 5 4 3 2 13 14 1 16 17 18 19 200 k 10 9 20 12 8 7 11 10.245 mhz 10 k 0.001 recovered audio data 0.41 m h 1.0 = 660 m h = 180 pf ? motorola, inc. 1996 rev 5
mc3335 2 motorola analog ic device data maximum ratings (t a = 25 c, unless otherwise noted) rating pin symbol value unit power supply voltage 5 v cc(max) 7.0 vdc operating supply voltage range (recommended) 5 v cc 2.0 to 6.0 vdc input voltage (v cc > 5.0 vdc) 1,20 v120 1.0 vrms junction temperature t j 150 c operating ambient temperature range t a 40 to + 85 c storage temperature range t stg 65 to + 150 c electrical characteristics (v cc = 5.0 vdc, f o = 49.7 mhz, deviation = 3.0 khz, t a = 25 c, test circuit of figure 2, unless otherwise noted.) characteristic pin min typ max unit drain current 5 4.5 7.0 madc input for 3.0 db limiting 0.7 2.0 m vrms recovered audio (rf signal level = 1.0 mv) 12 250 mvrms noise output (rf signal level = 0 mv) 12 250 mvrms carrier detect threshold (below v cc ) 9 0.64 vdc meter drive slope 9 100 m a/db input for 20 db (s + n/n) 1.3 m vrms first mixer 3rd order intercept (input) 20 dbm first mixer input resistance (r p ) 690 w first mixer input capacitance (c p ) 7.2 pf first mixer conversion voltage gain 18 db second mixer conversion voltage gain 21 db detector output resistance 12 1.4 k w figure 1. test circuit 68 k + 0.1 0.1 v cc 0.1 v cc 10 k 39 pf ceramic filter 455 khz to carrier detect indicator 15 6 5 4 3 2 13 14 1 16 17 18 19 200 k 10 9 20 12 8 7 11 10.245 mhz 7.5 k ra 300 0.1 1.0 0.01 0.1 56 pf 20 k 1.4 ceramic filter 10.7 mhz 39 mhz rf input 49.7 mhz 2.6 l p c p = 660 m h = 180 pf
mc3335 3 motorola analog ic device data 100 200 300 400 500 600 700 800 0 1.0 3.0 6.0 5.0 6.0 7.0 8.0 1.0 2.0 3.0 4.0 0 5.0 2.0 7.0 4.0 8.0 0 v cc (v) i (ma) cc v (mvrms) 12 figure 2. i meter versus input i cc , carr. det. low (rf in = 10 mv) i cc , carr. det. high (rf in = 0 mv) recovered audio 30 40 50 60 2.0 80 90 100 120 110 70 12 11 10 3.0 4.0 5.0 6.0 7.0 8.0 9.0 130 rf input (dbm) i ( a) 9 m figure 3. drain current, recovered audio versus supply a mc3335 9 v cc 70 10 10 60 50 40 20 30 20 80 0 30 40 50 60 80 90 100 120 110 70 130 rf input (dbm) rf input (dbm) 70 10 10 60 50 40 20 30 20 80 0 30 40 50 60 80 90 100 120 110 70 130 (s + n)/n (db) (s + n)/n (db) figure 4. (s + n), n of 2nd mixer figure 5. (s + n)/n versus input 12 0.01 mc3335 7.5 k s+n s+n n n 0 rf input (dbm) 20 10 70 10 10 60 50 40 20 30 20 80 0 30 40 50 60 80 90 100 70 (db) figure 6. 1st mixer 3rd order intermodulation 3rd order intermod. products desired products 10 10 30 40 20 relative input frequency (khz) 40 30 20 0 0 1.0 2.0 3.0 4.0 v (vdc) 12 figure 7. detector output versus frequency
mc3335 4 motorola analog ic device data circuit description the mc3335 is a complete fm narrowband receiver from antenna input to audio preamp output. the low voltage dual conversion design yields low power drain, excellent sensitivity and good image rejection in narrowband voice and data link applications. in the typical application diagram, the first mixer amplifies the signal and converts the rf input to 10.7 mhz. this if signal is filtered externally and fed into the second mixer, which further amplifies the signal and converts it to a 455 khz if signal. after external bandpass filtering, the low if is fed into the limiting amplifier and detection circuitry. the audio is recovered using a conventional quadrature detector. twiceif filtering is provided internally. the input signal level is monitored by meter drive circuitry which detects the amount of limiting in the limiting amplifier. the voltage at the meter drive pin determines the state of the carrier detect output which is active low. applications information the first local oscillator can be run using a free running lc tank, as a vco using pll synthesis, or driven from an external crystal oscillator. at higher v cc values (6.0 to 7.0 v), it has been run to 170 mhz. the second local oscillator is a common base colpitts type which is typically run at 10.245 mhz under crystal control. the mixers are doubly balanced to reduce spurious responses. the first and second mixers have conversion gains of 18 db and 22 db (typical), respectively. mixer gain is stable with respect to supply voltage. for both conversions, the mixer impedances and pin layout are designed to allow the user to employ low cost, readily available ceramic filters. overall sensitivity is shown in figure 5. the input level for 20 db (s + n)/n is 1.3 m v using the twopole postdetection filter as demonstrated. following the first mixer, a 10.7 mhz ceramic bandpass filter is recommended. the 10.7 mhz filtered signal is then fed into one second mixer input pin, the other input pin being connected to v cc . pin 5 (v cc ) is treated as a common point for emitterdriven signals. the 455 khz if is typically filtered using a ceramic bandpass filter, then fed into the limiter input pin. the limiter has 10 m v sensitivity for 3.0 db limiting, flat to 1.0 mhz. the output of the limiter is internally connected to the quadrature detector, including a quadrature capacitor. a parallel lc tank is needed externally from pin 11 to vcc. a 39 k w shunt resistance is included which determines the peak separation of the quadrature detector; a smaller value will increase the spacing and linearity but decrease recovered audio and sensitivity. a data shaping circuit is available and can be coupled to the recovered audio output of pin 12. the circuit is a comparator which is designed to detect zero crossings of fsk modulation. data rates of up to 35000 baud are detectable using the typical application. hysteresis is available by connecting a highvalued resistor from pin 13 to pin 14. values below 120 k w are not recommended as the input signal cannot overcome the hysteresis. the meter drive circuitry detects input signal level by monitoring the limiting of the limiting amplifier stages. figure 2 shows the unloaded current at pin 9 versus input power. the meter drive current can be used directly (rssi) or can be used to trip the carrier detect circuit at a specified input power. to do this, pick an rf trip level in dbm. read the corresponding current from figure 2 and pick a resistor such that: r9 = 0.64 vdc / i9 hysteresis is available by connecting a highvalued resistor rh between pin 9 and 10. the formula is: hysteresis = v cc /(rh x 10 7 ) db
mc3335 5 motorola analog ic device data p suffix plastic package case 73803 dw suffix plastic package case 751d03 (so20l) outline dimensions 0.050 bsc 0.100 bsc 0.300 bsc 1.27 bsc 2.54 bsc 7.62 bsc min min max max millimeters inches dim 25.66 6.10 3.81 0.39 1.27 0.21 2.80 0 0.51 27.17 6.60 4.57 0.55 1.77 0.38 3.55 15 1.01 1.010 0.240 0.150 0.015 0.050 0.008 0.110 0 0.020 1.070 0.260 0.180 0.022 0.070 0.015 0.140 15 0.040 a b c d e f g j k l m n notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension alo to center of lead when formed parallel. 4. dimension abo does not include mold flash. 5. 73802 obsolete, new standard 73803. a c k n e gf d 20 pl j 20 pl l m t seating plane 110 11 20 0.25 (0.010) t a m m 0.25 (0.010) t b m m b min min max max millimeters inches dim a b c d f g j k m p r 0.510 0.299 0.104 0.019 0.035 0.012 0.009 7 0.415 0.029 0.499 0.292 0.093 0.014 0.020 0.010 0.004 0 0.395 0.010 12.95 7.60 2.65 0.49 0.90 0.32 0.25 7 10.55 0.75 12.65 7.40 2.35 0.35 0.50 0.25 0.10 0 10.05 0.25 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. 751d01, and 02 obsolete, new standard 751d03. 1.27 bsc 0.050 bsc a b p 10 pl 1 10 11 20 g t d 20 pl k c seating plane r x 45 m f j 0.25 (0.010) b m m 0.25 (0.010) t b a m s s
mc3335 6 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. 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 mc3335/d ?
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