Order this document bv MC336~ MoroRo6A @ MC3362 Low-Power Narrowband FM Receiver I . . . includes dual FM conversion with oscillators, mixers, quadrature discriminator, and meter drive/carrier detect circuitry. The MC3362 also has buffered first and second local "oscillator outputs and a comparator circuit for FSK detection. . Complete Dual Conversion Circuitry . Low Voltage: VCC = 2.0 to 6.0 Vdc Low Drain Current (3.6 mA (Typical) @ VCC = 3.0 Vdc) Excellent Sensitivi& for 12 dB SINAD Externally Adjustable Carrier Detect Function Input Voltage 0.6 pVrms (Typical) Low Number of External Parts Required . Manufactured . MC13135 is Preferred for New Designs Using Motorola's MOSAIC@ Process Technology Figure 2. Pin Connections Representative Figure 1. Simplified Application iq.~@Frequency Synthesized Re@~&r, RF Input ,.:F+::+, `,.$* &$*8j$Y" to200MHz let Wxer Inpti let Mixer Inpti 2nd LO Ou@ti Vericsp Control 2nd LO Emitier IQ LO Tank 2nd LO Base let LO Tank 2nd Wxer Ou@ut 1- I "-1 & .a?s~era~ .....2~o- ~ 0.41pH `opLLorprescaler 16 19 CeramicFilter 10.7MHz 18 k 1~1 g n & 16 10k + 4 10 k To Carrier Detect Indicator -- ------ [b------ 15 11 14 12 13 I Tw P Data let Mxer O@ut Umiter Inpti 2nd Mixer Input Limiter Dmupling hmiter Dmuphng 2nd Mixer Input VEE Metar Drive Comparator O@ti Carrier Dated Comparator Input Quadrahra Coil ;,\ Ist LO Otiput Vcc Detester Odpti 1 m ORDERING ~ 39-K w Lp = 660VH I Cp = 180pF I 10 II and Block Diagram @ Motorola, Inc. 1996 INFORMATION Rev 2 MC3362 MWIMUM RATING (TA = 25C, unless otherwise noted) Rating Pin Power Supply Voltage (See Figure 2) 6 Operating Supply Voltage Range (Recommended) Input Voltage (Vcc 6 z 5,0 Vdc) 1,24 Value Unit VCC(max) 7.0 Vdc Vcc 2,0 to 6.0 Vdc 1.0 Vrms 150 `c Vi-24 Junction Temperature TJ Operating Ambient Temperature Storage Temperature ELECTRICAL Symbol Range TA ,- Range CHARACTERISTICS -40to Tstg (VCC = 5.0 Vdc, f. = 49.7 MHz, Deviation= unless otherwise noted) Characteristic Pin Drain Current (Carrier Detect Low - See Figure 5) +85 `c +150 `c *,~ .,,y.:.! :.::,b.,$;, *,$3$,, ~.,$.! `i> ,, Y<)z ~ 3.o kHz, TA = 25C, Test C[rcuit of Hgur~,~:t;~ .s.~:.: ~ -65to Min 6 Input for -3.0 dB Limiting Inputfor 12 dB SINAD (See Figure 9) Series Equivalent 4.5 >,<3' z~ij<.~h 0,$ "2iJ p Recovered Audio (RF signal level =10 mV) -- 13 Noise Output (RF signal level = O mV) 13 Carrier Detect Threshold 10 (below Vcc) Meter Drive Slope 10 J""''*~$"~ ., a _ pVrms First Mixer 3rd Order Intercept (Input) First Mixer Input Resistance (Rp) (Cp) Conversion Voltage Gain, First Mixer Conversion Voltage Gain, Second Mixer 250 mVrms 0.64 Vdc nNdB -- 0.7 -22 690 KVrms dBm `- 7,2 a -- 18 pF dB 21 ,Ggf$ 13 *,: " >.,? .. ,, ,..), .x>,,, ,`,\:i:>i,t,,, .. ,,, ",!. . .,~$.. ~~,..,,, ,..'$.s' "rFigure3. Test Circuit Dector Output Resistance Q mVrms 100 ,,..., ;.$,~{.+fi, ~ _ .$!ll, ,\,,.$*. .'*.i*, ,$\s* -- .,..,,.. ~;)th\ ,*,.!..*,.,>,,<$. ? *$. be ,,{,: .'\*t, , "$*>.,, .*:S$,h,?:: j::i., .b:> J,..} . ,.i,f,. Input for 20 dB (S+ N)/N (See' Figure 7) mA VVrms : ": ;?$;'~350 ,~ `i<y ~i,)~.,i= *~&::*s!,& . . Unite 2.O * *+:;?* , .$$$&50 Input Impedence First Mixer Input Capacitance ,,tg $;';$"$" ,:, ~..,.' Typ 1.4 -- kn RF Input 4I 4 ,$4,* .$. !$,3. ,..-:.$,., ... ,,;r-~?::j - ~~ .,>\J/* ,~,, I) ,+;*..,..-,,,., \\*. if' `i. 0.1 ~,?,:j ,. ~+:t~~i$. ~.$it., ,,,{$ 4I ,+), ,1.~ II `.~:::>$:t< tit,, .*W.. -~,;. ~;i,...~t:,.,jt , 68 ~ .<+., .$! \,. .>y 4~ ?s r FL1m 6 MC3362 ,9 muRata CFU455D or Toko LFM551 LL FM 0 7 18 1 8 17 9 16 10 15 11 14 II 0.1 1 -- ---- 180pF II II (t 0.1 ~ I -1 ; `2 4t II FL2: muRata SFEI 0.7MA or TokoSK107M%A&l O (b 13 ------ TokoRMG2A6597HM Vcc o 1.0 pF tl( o VEE NOTE: See AN960 for Additional Design Information. 2 MOTORO~ ,' ,,, ANALOG IC DEVICE DATA MC3362 Figure 5. Drain Current, Recovered Audio versus Supply Figure 4. lMeter versus input 12 11 - 1 1 1 t / Vcc 10 10 A 8"0~aoo " ICC, Carr. Det. Low (RF in = 10 m~ MC3362 9.0 8.0 :9/ ! 1 ; _ _ -80 -70 -60 -50 -40 ICC, Carr. Det. High (RF in = O mW. i~:= 7.0 / 8.0 5.0 / / ` ` 4.0 3.0 2.0 --- -130-120 -110-100 -90 -30 RF INPUT (dBm) Figure 6. Signal Levels 30 20 20 S+N 10 o & = ~ z g C~-fimA h~;vevn,, -20 `~ -30 St N30%AM =- -40 -30 ~ c -50 -40 -40 -50 `: -60 -70 -1 MC*Y ` N = -80 -130-120-110-100 -90 -80 -70 RF INPUT (dBm) -60 -30 . Figure 9. Detector Output versus Frequency 4.0 3.0 1.0 0 -100 -90 -80 -70 -60 -50 -40 -30 RF INPUT (dBm) MOTOROLA ANALOG [C DEVICE DATA -20 -10 0 -40 -30 -20 -lo 0 10 RELATIVE INPUT FREQUENCY 20 30 40 (kHz) 3 ... . ,,- MC3362 Figure 10. PC Board Test Circuit (LC Oscillator Configuration Used in PLL Synthesized Receiver) ---- -- 1 51 k I Carrier Detect r 455 kHz LC Resonator I [ ~ ------ H `1 -I L :. * -,,,,..$, ., .' *, ".- ,. $ U,u I (Mc3$~@~~&. Crystal used is series mode reeonant (no load capacity specified), 3rd overtone, This method has not proven adequate for fundamental mode, 5th or 7th overtone cystals. The inductor and capacitor will need to be changed for other frequency crystals. See AN980 for further information, MC3362 Figure 11. Component Placement View Showing Crystal Oscillator Circuit Figure 11A. LC Oscillator Component View \.t:,\,, *S` s~. NOTES: 1. Recovered Audio components maybe deleted when using 5i,MeX.Drive cannot be used simultaneously with Carrier Detect output. data output. ~~~For a~log meter drive, remove components Iabelled "2" and measure 2. Carrier Detect components must be deleted in order to obtain `* `i:?@etercurrent (4-12@) through ammeter to Vcc. linear Meter Drive output. With these components in place the $":~~:~. %er type of oscillator circuit maybe used with any output circuit Meter Drive outputs serve only to trip the Carrier Detect indicator. ,i. ~,, # configuration. 3. Data Output components should be deleted in applications `,,,,,.`~i{. `$' 7. LC Oscillator Coil: Coilcraft UN I 10/42 10.5 turns, 0.41 LH Cryetal where only audio modulation is used. For combined audio/data "<$:~~~x~' Oscillator circuit trim coil, 0.68 wH. Coilcraff Ml 287-A. .:$ applications, the 0.047 WFcoupling capacitor will add distortion 8.0.47 H, Coi[crsff M128&A. Input LC network used to match first mixer to the autio, so a pull+own resistor at pin 13 may be r~uire~$ input impedance to 50 Q. ,.,f$~ 4. UseToko7MC81282 Quadrature coil. \ b:., :~.:>. `~t: ..... *,&,.,, $, ,6. :t:i'~.'~~ * ,i.? ..,~~ <?~+, *,*$-' *$. .~:t,,\,J.' `,I::J,$,. `4&.f CIRCUIT DESCRIPTION ,$,:;, .,>.\.,,\\. The MC3362 is a complete FM nayQ~&Rd receiver from antenna input to audio preamp out~t: ~~~ low voltage dual conversion design yields lo~" pQWr drain, excellent sensitivity and good image r$J~<@Jfi narrowband voice and data link applications. ..,,,, :& :] In the typical app@al]$~'[Figure 1), the first mixer amplifies the signal ,Qnd@$Yetis the RF input to 10.7 MHz. This IF signal is ,:~~$ ehernally and fed into the second mixer, which f~~~~~plifies the signal and converts it to a 455 kHz IF si~~fiker external bandpass filtering, the low IF is fed int~yt$~'''hiting amplifier and detection ci rcuitry. The, ~ "It> audio~s~e~ered using a conventional quadrature detector. is provided internally, #~J~R,&put signal level is monitored by meter drive circuit~ \&w~~ detects the amount of limiting in the limiting amplifier. ~z~~'voltage at the meter drive pin determines the state of the ~arrier detect output, which is active low. Twlw,$ltefing APPLICATIONS INFORMATION The first local oscillator can be run using a free-running LC tank, as a VCO using PLL synthesis, or dtiven from an external c~stal oscillator, It has been run to 190 MHz.* A buffered output is available at Pin 20. The second local oscillator is a common base Colpitts type which is typically run at 10.245 MHz under crystal control. A buffered output is available at Pin 2. Pins 2 and 3 are interchangeable. 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, as seen in Figure 6: 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 and AM rejection are shown in Figure 7. The input level for 20 dB (S+ N)/N is 0.7 WV using the W-pole post-detection filter pictured. MOTOROLA ANALOG [C DEVICE DATA If the first local oscillator (Hns 21 and/or 22) is driven from a strong external source (100 mVrms), the mixer can be used to over 450 MHz. 5 Following the first mixer, a 1,0.7 MHz ceramic band-pass filter is recommended, The 10.7 MHz filtered signal is then fed into one second mixer input pin, the other inputpin being connected to VCC. Pin 6 (VCc) is treated as a common point for emitier-driven signals. The 455 kHz' IF `is typically filtered using a ceramic bandpass filter then fed into the limiter input pin. The limiter has 10 pV 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 LCtank is needed externally from Pin 12to VCC. A39 kQ shunt resistance is included which determines the peak separation of the quadrature detecto~ 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 13. The circuit is a comparator which is designed to detect zero crossings of 6 FSK modulation. Data rates are typically limited to 1200 baud to ensure data integrity and avoid adjacent channel "splatier." Hysteresis is available by connecting a high valued resistor from Pin 15 to Pin 14. Values below 120 ~ are not recommended as the input signal cannot overcome the hysteresis. The meter drive circuitry detects input signal level by monito~ng the limiting amplifier stages. Figure 4 shows the unloaded current at Pin 10 versus input power. The ,,~eter drive current can be used directly (RSSI) or can be.;~~~lto trip the carrier detect circuit at a specified input p~~~l~o `do this, pick an RF trip level in dBm. Read the ~%~~~pnding current from Figure 4 and pick a resistor SU.?:IE%; \ .,,,$,' ~s,, R1o = 0.64 Vdc I l~~;~ ,~'" Hysteresis is available by connecti@t*&\~#fi" valued resistor RH between Pins 10 and 11,Thq,fo@& is: MOTOROLA ANALOG IC DEVICE DATA II .. ..(Q 5 r I , I , ,.. $ Vv k 4 4, I J I 1 OUTLINE DIMENSIONS P SUFFIX PWSTIC ,, CASE PACWGE 72~3 ISSUE D NOTES 1, CHAMFEREO CONTOUR OPTIONAL 2. OIMENSION LTOCENTER OFLEAOS WHEN FORMED PARALLEL 3. DIMENSIONING ANDTOLERANCING PERANSI ,*!. Y14.5M, 1982, `*{,3, eg..<.\.*:,2,\, 4. CONTROLLING DIMENSION INCH. m ~c F:l II ,W PI 24 ,,, ,,, ,, 411 I I ",- ",, , ,," , J NOTES 1. DIMENSIONING ANOTOLERANCING PERANSI ~%?"* Y14.5M, 1982. 2. CONTROLLING DIMENSION MILLIMETER, 3. DIMENSIONS A AND B DO NOT INCLUOE MOLO PROTRUSION, 4. MAXIMUM MOLD PROTRUSION 0.15 (0,006) PER SIDE. DAMBAR 5. OIMENSION D DOES NOTINCLUOE PROTRUSION, ALLOWABLE DAMBAR PROTRUSION SHALL BE0.13(0.005)TOTAL IN MCESSOFOOIMENSION AT MAXIMUM MATERIAL CONOITION, ..,, ~ \:, ~ `{.i$ -. `:!~t>+,i<$,i Motorola rese@~~ right to make changes without furfher notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitebili~~~~~~roducts for any particular purpose, nor does Motorola assume any liabili~ arising out of the apphcation or use of any product or circuit, and specific@d,#ms any and all liability, including without fimifefionconsequential or incidental damages. Typical" parameters which maybe provided in Motorola data:h~~s~tiorspecificationscan anddovaryin different applicationa and actual performance mayvaryovertime. Alloperetingparemeters, Inciuding'Typicals" m@@ ~~ated for each customer aP,PfiCafiOnby customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of oW~''%tOrOla products are not deslgnad, intended, or authorized for use as components in systems intended for surgical implant into the body, or other :Wf!$fionsintended to suPPofior sus~n iife, orforanY other application in which tha failure of the Motorola product could create a situation where personal injuy ,efh may occur. 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