not recommended for new desi g ns not recommended for new designs device operating temperature range package semiconductor technical data wideband fsk receiver ordering information mc13055d mc13055p t a = 40 to +85 c so16 plastic dip pin connections p suffix plastic package case 648 d suffix plastic package case 751b (so16) comparator gnd comparator 10 16 15 14 13 12 + 11 9 8 7 6 5 4 3 2 limiter bias quad input detector out comparator v cc meter drive data out carrier detect limiter input 1 if ground quad bias if v cc mc13055 motorola wireless rf, if and transmitter device data 3.29
the mc13055 is intended fo rf data link systems using carrier frequencies up to 40 mhz and fsk (frequency shift keying) data rates up to 2.0 m baud (1.0 mhz). this design is similar to the mc3356, except that it does not include the oscillator/mixer. the if bandwidth has been increased and the detector output has been revised to a balanced configuration. the received signal strength metering circuit has been retained, as has the versatile data slicer/comparator. ? input sensitivity 20 m v @ 40 mhz ? signal strength indicator linear over 3 decades ? available in surface mount package ? easy application, few peripheral components figure 1. block diagram and application circuit squelch adjust (meter) 40mhz if input (50 w ) + + 10 11 14 12 13 15 9 16 2 8 7 6 5 4 3 l2 39pf 3.9k 3.9k 68pf 5.0k carrier detect 100pf data output 1.0k limiter v cc 0.1 27pf 0.01 l1 22pf 0.8v 1 0.01 0.01 v cc
not recommended for new desi g ns not recommended for new designs mc13055 mc13055 motorola wireless rf, if and transmitter device data 3.210 maximum ratings rating symbol value unit power supply voltage v cc(max) 15 vdc operating supply voltage range v2, v4 3.0 to 12 vdc 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 power dissipation, package rating p d 1.25 w electrical characteristics (v cc = 5.0 vdc, f o = 40 mhz, f mod = 1.0 mhz, d f = 1.0 mhz, t a = 25 c, test circuit of figure 2.) characteristic conditions min typ max unit total drain current 12 + 14 20 25 ma data comparator pulldown current i16 10 ma meter drive slope versus input i12 4.5 7.0 9.0 m a/db carrier detect pulldown current i13 1.3 ma carrier detect pullup current i13 500 m a carrier detect threshold voltage v12 690 800 1010 mv dc output current i10, i11 430 m a recovered signal v10 v11 350 mvrms sensitivity for 20 db s + n/n, bw = 5.0 mhz vin 20 m vrms s + n/n at v in = 50 m v v10 v11 30 db input impedance @ 40 mhz r in c in pin 5, ground 4.2 4.5 k w pf quadrature coil loading r in c in pin 9 to 8 7.6 5.2 k w pf figure 2. test circuit 2 16 15 14 13 12 11 10 9 8 7 6 5 4 3 detector output 3.9k 3.9k meter drive coils shielded coilcraft uni10/142 l1 gray 81/2 turns, nominal 300 nh l2 black 101/2 turns, nominal 380 nh carrier detect output l2 39pf 100pf 1.0k 0.1 0.01 0.01 l1 27pf input 22pf v cc 1 0.01 0.01
not recommended for new desi g ns not recommended for new designs mc13055 mc13055 motorola wireless rf, if and transmitter device data 3.211 8 20k 9 7 5 0.1 51 0.1 input mc13055 10 100 90 80 70 50 60 40 30 20 10 100 90 80 70 60 50 40 30 20 0 0 f, input frequency (mhz) v in , input limiting sensitivity (dbm) figure 3. overall gain, noise, am rejection figure 4. meter current versus signal figure 5. untuned input: limiting sensitivity versus frequency figure 6. untuned input: meter current versus frequency figure 7. limiting sensitivity and detuning versus supply voltage figure 8. detector current and power supply current versus supply voltage 800 0 100 3.0 v input 10 0 20 60 40 80 60 50 40 30 20 100 0 output f mod = 1.0 mhz d f = 1.0 mhz signal input (dbm) amr 1.0 khz 30% noise 500 0 20 40 60 80 0 100 200 300 400 12 v 100 600 input signal (dbm) 600 700 500 400 300 200 100 90 80 70 60 50 40 30 20 10 0 0.1 51 0.1 20k 5 7 9 8 mc13055 1000 50 40 30 20 10 0 1.0 60 13 15 11 9.0 v cc , supply voltage (vdc) 7.0 5.0 3.0 0 0 200 400 600 800 f, input frequency (mhz) 1200 i2 + i4 i10 + i11 50 15 40 3 40.2 40.1 40.0 39.9 39.8 39.7 39.6 39.5 39.4 39.3 13 1.0 39.2 11 9.0 5.0 7.0 3.0 0 90 80 70 60 40 40 mhz v cc , supply voltage (vdc) limiting sensitivity v cc = 5.0 v, 7.0 v relative output (db) l12, meter current ( a) m l12, meter current ( adc) m v in , input limiting sensitivity (dbm) quad coil tuning (mhz) l10 + l11, detector current ( adc) m l2 + i4, power supply current (ma) quadrature coil tuning 80 70 60 50 40 30 20 10 input 0 dbm
not recommended for new desi g ns not recommended for new designs mc13055 mc13055 motorola wireless rf, if and transmitter device data 3.212 figure 9. recovered audio versus temperature figure 10. carrier detect threshold versus temperature figure 11. meter current versus temperature figure 12. input limiting versus temperature figure 13. input impedance, pin 5 1.0 5.0 1.0m 10m 20m 30m 50m 100m 0.5 200m 2.0 1.0 0.2 5.0 2.0 1.0 0.5 0.2 0 0.2 0.5 cp = 4p5 rp = 4k2 y = 0.24 + j1.1 30 140 120 100 80 60 40 20 0 20 500 60 50 40 40 100 200 300 400 20 10 t a , ambient temperature ( c) 60 input 0 dbm 600 60 140 120 100 80 60 40 20 0 20 40 90 80 70 t a , ambient temperature ( c) 60 800 140 120 100 80 60 40 20 0 20 40 500 600 700 900 50 60 1000 t a , ambient temperature ( c) 2.0 140 120 100 80 60 40 20 0 20 40 12 10 8.0 6.0 4.0 2.0 0 4.0 t a , ambient temperature ( c) 60 v 10 , relat iv e a u d i o o u t pu t ( db ) v12, carrier detect threshold (mv) l 12 , m eter c u rrent (a) m v in , input limiting sensitivity (dbm)
not recommended for new desi g ns not recommended for new designs mc13055 mc13055 motorola wireless rf, if and transmitter device data 3.213 figure 14. test fixture (component layout) bnc .4 m h .3 m h 4 (circuit side view) 4 squelch control 5k pot 1k .01 .01 22p 27p .01 .01 100p 68p .1 mc13055 3.9k 3.9k data out input detector output meter drive carrier detect gnd vcc 4 4 mc13055 39p
not recommended for new desi g ns not recommended for new designs mc13055 mc13055 motorola wireless rf, if and transmitter device data 3.214 4 5 6 7 3 12 71 58 57 56 55 54 52 59 bb 13 14 15 16 17 18 19 20 21 22 23 24 25 26 60 61 62 63 64 45 28 27 25 46 65 26 35 9 15 31 32 29 53 30 33 34 37 38 10 11 36 8 39 48 51 50 49 47 66 67 68 69 70 13 72 73 74 76 77 83 81 84 87 86 85 91 89 82 92 78 79 92 80 94 2 16 14 1 90 figure 15. d figure 15. internal schematic
not recommended for new desi g ns not recommended for new designs mc13055 mc13055 motorola wireless rf, if and transmitter device data 3.215 general description the mc13055 is an extended frequency range fm if, quadrature detector, signal strength detector and data shaper. it is intended primarily for fsk data systems. the design is very similar to mc3356 except that the oscillator/mixer has been removed, and the frequency capability of the if has been raised about 2:1. the detector output configuration has been changed to a balanced, opencollector type to permit symmetrical drive of the data shaper (comparator). meter drive and squelch features have been retained. the limiting if is a high frequency type, capable of being operated up to 100 mhz. it is expected to be used at 40 mhz in most cases. the quadrature detector is internally coupled to the if, and a 2.0 pf quadrature capacitor is internally provided. the 20 db quieting sensitivity is approximately 20 m v, tuned input, and the if can accept signals up to 220 mvrms without distortion or change of detector quiescent dc level. the if is unusual in that each of the last 5 stages of the 6 stage limiter contains a signal strength sensitive, current sinking device. these are parallel connected and buffered to produce a signal strength meter drive which is fairly linear for if input signals of 20 m v to 20 mvrms (see figure 4). a simple squelch arrangement is provided whereby the meter current flowing through the meter load resistance flips a comparator at about 0.8 vdc above ground. the signal strength at which this occurs can be adjusted by changing the meter load resistor. the comparator (+) input and output are available to permit control of hysteresis. good positive action can be obtained for if input signals of above 20 m vrms. a resistor (r) from pin 13 to pin 12 will provide v cc /r of feedback current. this current can be correlated to an amount of signal strength hysteresis by using figure 4. the squelch is internally connected to the data shaper. squelch causes the data shaper to produce a high (v cc) output. the data shaper is a complete a floatingo comparator, with diodes across its inputs. the outputs of the quadrature detector can be fed directly to either or preferably both inputs of the comparator to produce a squared output swinging from v cc to ground in inverted or noninverted form.
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