View MC3372_2216482.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www.lansdale.com page 1 of 19 issue a ml3371 ml3372 low power narrowband fm if legacy device: motorola mc3371, MC3372 the ml3371 and ml3372 perform single conversion fm reception and consist of an oscillator, mixer, limiting if amplifi- er, quadrature discriminator, active filter, squelch switch, and meter drive circuitry. these devices are designed for use in fm dual conversion communication equipment. the ml3371/ml3372 are similar to the motorola mc3361/mc3357 fm ifs, except that a signal strength indicator replaces the scan function control- ling driver which is in the mc3361/mc3357. the ml3371 is designed for the use of parallel lc components, while the ml3372 is designed for use with either a 455 khz ceramic dis- criminator, or parallel lc components. these devices also require fewer external parts than earlier products. the ml3371 and ml3372 are available in dual?n?ine and surface mount packaging. ? wide operating supply voltage range: v cc = 2.0 to 9.0 v ? input limiting voltage sensitivity of ?.0 db ? low drain current: i cc = 3.2 ma, @ v cc = 4.0 v, squelch off ? minimal drain current increase when squelched ? signal strength indicator: 60 db dynamic range ? mixer operating frequency up to 100 mhz ? fewer external parts required than earlier devices ? operating temperature range t a = ?0 to +70? so 16 = -5p plastic package case 751b (so?6) p dip 16 = ep plastic package case 648 16 1 16 1 cross reference/ordering information motorola p dip 16 mc 33 71p ml 33 71ep s o 16 mc 33 71d ml 33 71-5p p dip 16 mc 33 72p ml 33 72ep s o 16 mc 33 72d ml 33 72-5p lan s dale package note : lansdale lead free ( p b ) product, as it becomes available, will be identified by a part number prefix change from ml to ml e . maximum ratings rating pin symbol value unit power supply voltage 4 v cc (max) 10 vdc rf input voltage (v cc 4.0 vdc) 16 v16 1.0 vrms detector input voltage 8 v8 1.0 vpp squelch input voltage (v cc 4.0 vdc) 12 v12 6.0 vdc mute function 14 v 14 ?.7 to 10 v pk mute sink current 14 l14 50 ma junction temperature t j 150 c storage temperature range t stg ?5 to +150 c notes: 1. devices should not be operated at these values. the ?ecommended operating conditions?table provides conditions for actual device operation. 8 pin connections 11 gnd mute crystal osc meter drive squelch input recovered audio mixer input filter output 8 mixer output decoupling quad coil v cc ml3371 (top view) 3 2 4 5 6 limiter input 10 7 16 1 15 14 13 12 9 filter input decoupling limiter output 11 gnd mute crystal osc meter drive squelch input recovered audio mixer input filter output mixer output quad input v cc ml3372 (top view) 3 2 4 5 6 limiter input 10 7 16 1 15 14 13 12 9 filter input
www.lansdale.com page 2 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 recommended operating conditions rating pin symbol value unit supply voltage (@ t a = 25 c) ( ?0 c t a +75 c) 4 v cc 2.0 to 9.0 2.4 to 9.0 vdc rf input voltage 16 v rf 0.0005 to 10 mvrms rf input frequency 16 f rf 0.1 to 100 mhz oscillator input voltage 1 v local 80 to 400 mvrms intermediate frequency f if 455 khz limiter amp input voltage 5 v if 0 to 400 mvrms filter amp input voltage 10 v fa 0.1 to 300 mvrms squelch input voltage 12 v sq 0 or 2 vdc mute sink current 14 l sq 0.1 to 30 ma ambient temperature range t a ?0 to +70 c ac electrical characteristics (v cc = 4.0 vdc, f o = 58.1125 mhz, df = 3.0 khz, f mod = 1.0 khz, 50 ? source, f local = 57.6575 mhz, v local = 0 dbm, t a = 25 c, unless otherwise noted) characteristic pin symbol min typ max unit input for 12 db sinad matched input ?(see figures 11, 12 and 13 ) unmatched input ?(see figures 1 and 2) v sin 1.0 5.0 15 vrms input for 20 db nqs v nqs 3.5 vrms recovered audio output voltage v rf = ?0 dbm af o 120 200 320 mvrms recovered audio drop voltage loss vrf = ?0 dbm, v cc = 4.0 v to 2.0 v af loss ?.0 ?.5 db meter drive output voltage (no modulation) v rf = ?00 dbm v rf = ?0 dbm v rf = ?0 dbm 13 m drv mv1 mv2 mv3 1.1 2.0 0.3 1.5 2.5 0.5 1.9 3.1 vdc filter amp gain r s = 600 ? , f s = 10 khz, v fa = 1.0 mvrms a v(amp) 47 50 db mixer conversion gain v rf = ?0 dbm, r l = 1.8 k ? a v(mix) 14 20 db signal to noise ratio v rf = ?0 dbm s/n 36 67 db total harmonic distortion v rf = ?0 dbm, bw = 400 hz to 30 khz thd 0.6 3.4 % detector output impedance 9 z o 450 ? detector output voltage (no modulation) v rf = ?0 dbm 9 dv o 1.45 vdc meter drive v rf = ?00 to ?0 dbm 13 m o 0.8 a/db meter drive dynamic range rf in if in (455 khz) 13 mvd 60 80 db mixer third order input intercept point f1 = 58.125 mhz f2 = 58.1375 mhz ito mix ?2 dbm mixer input resistance 16 r in 3.3 k ? mixer input capacitance 16 c in 2.2 pf
www.lansdale.com page 3 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 dc electrical characteristics (v cc = 4.0 vdc, t a = 25 c, unless otherwise noted) characteristic pin symbol min typ max unit drain current (no input signal) squelch off, v sq = 2.0 vdc squelch on, v sq = 0 vdc squelch off, v cc = 2.0 to 9.0 v 4 lcc1 lcc2 dlcc1 3.2 3.6 1.0 4.2 4.8 2.0 ma detector output (no input signal) dc voltage, v8 = v cc 9 v9 0.9 1.6 2.3 vdc filter output (no input signal) dc voltage voltage change, v cc = 2.0 to 9.0 v 11 v11 dv11 1.5 2.0 2.5 5.0 3.5 8.0 vdc trigger hysteresis hys 34 57 80 mv quad coil toko 2a6597 hk (10 mm) or 7mc?128z (7 mm) 15 22 0.33 0.001 57.6575 mhz oscillator 0.1 0.1 20 k 0.1 murata cfu455d2 or equivalent 14 c1 0.01 51 51 k rf input v cc = 4.0 vdc 13 24 38 567 1 15 + 16 mute 0.1 12 11 10 9 filter out 1.0 f demodulator af amp rssi output 510 k sq in filter in 470 8.2 k 0.01 af out to audio power amp 53 k 10 limiter amp filter amp mixer squelch trigger with hysteresis figure 1. ml3371 functional block diagram and test fixture schematic 1.8 k 51 k 1.0 f
www.lansdale.com page 4 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 15 22 0.33 0.001 57.6575 mhz oscillator c15 0.1 ceramic resonator murata cfu455d2 or equivalent 14 c1 0.01 51 51 k rf input v cc = 4.0 vdc 13 24 38 567 1 15 + 16 mute 0.1 12 11 10 9 filter out 1.0 f demodulator af amp rssi output 510 k sq in filter in 470 8.2 k 0.01 af out to audio power amp 53 k limiter amp filter amp mixer squelch trigger with hysteresis c14 27 r10 1.8 k r11 51 k c12 0.1 c13 0.1 r12 4.3 k murata cdb455c16 figure 2. ml3372 functional block diagram and test fixture schematic 1.0 f 10
www.lansdale.com page 5 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 figure 3. total harmonic distortion versus temperature ?5 0 125 20 t a , ambient temperature ( c) 5.0 25 45 30 ?40 10 40 50 60 ?00 65 ?0 ?0 ?20 20 0 ?0 20 t a = ?0 c t a = 25 c 105 85 70 5.0 0 1.0 4.0 3.0 2.0 ?5 ?5 t a = 75 c t a = 75 c t a = ?0 c v cc = 4.0 vdc f o = 10.7 mhz rf input (dbm) ) % ( n o i t r o t s i d c i n o m r a h l a t o t , d h t ) a ( t u o i s s r figure 4. rssi versus rf input v cc = 4.0 vdc rf input = ?0 dbm f o = 10.7 mhz typical curves (unmatched input) ) a ( t u p t u o i s s r ?0 dbm 45 65 25 ?5 ?5 ?0 dbm t a , ambient temperature ( c) 5.0 105 ?5 125 85 v cc = 4.0 vdc f o = 10.7 mhz ?10 dbm ?0 ?0 v cc = 4.0 vdc t a = 27 c 100 mhz 3rd order products ?0 ?0 ?0 ?0 ?0 ?20 0 10 ?50 ?10 ?30 ?40 ?70 rf input (dbm) ?60 0 100 mhz desired products ) m b d ( t u p t u o r e x i m 30 18 60 t a = ?0 c t a = 25 c f o = 10.7 mhz rf in ?0 dbm 1.8 k ? load t a = 75 c 48 54 6.0 42 36 0 24 18 12 6.0 9.0 12 8.0 9.0 21 ?.0 dbm 0 dbm 10 ?5 dbm 1.0 ?0 dbm ?0 dbm 5.0 dbm 40 f, frequency (mhz) 30 20 0 100 10 1000 10 7.0 6.0 5.0 3.0 4.0 v cc , supply voltage (v) 1.0 2.0 30 27 24 0 15 3.0 0 ) a ( t u p t u o i s s r ) b d ( n i a g r e x i m figure 5. rssi output versus temperature figure 6. mixer output versus rf input figure 7. mixer gain versus supply voltage figure 8. mixer gain versus frequency v cc = 4.0 vdc t a = 27 c rf in = ?0 dbm
www.lansdale.com page 6 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 ml3371 pin function description operating conditions v cc = 4.0 vdc, rf in = 100 v, f mod = 1.0 khz, f dev = 3.0 khz. ml3371 at f rf = 10.7 mhz (see figure 11). pin symbol internal equivalent circuit description waveform 1 osc1 osc1 v cc 1 15 k the base of the colpitts oscillator. use a high impedance and low capacitance probe or a ?niffer?to view the wave form without altering the frequency. typical level is 450 mvpp. 2 osc2 200 a 2 osc2 the emitter of the colpitts oscillator. typical signal level is 200 mvpp. note that the signal is somewhat distorted compared to that on pin 1. 3 mx out 3 4 mixer out v cc 15k output of the mixer. riding on the 455 khz is the rf carrier component. the typical level is approximately 60 mvpp. 4 v cc 100 a 1 . 5k supply voltage ?.0 to 9.0 vdc is the operating range. v cc is decoupled to ground. 5 if in 1.8 k 7 51 k 53 k 5 if in 6 dec1 input to the if amplifier after passing through the 455 khz ceramic filter. the signal is attenuated by the filter. the typical level is approximately 50 mvpp. 6 7 dec1 dec2 dec2 60 a if decoupling. external 0.1 f capacitors connected to v cc . 8 quad coil 10 v cc 8 quad coil 50 a quadrature tuning coil. composite (not yet demodulated) 455 khz if signal is present. the typical level is 500 mvpp.
www.lansdale.com page 7 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372
www.lansdale.com page 8 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 ml3371 pin function description (continued) operating conditions v cc = 4.0 vdc, rf in = 100 v, f mod = 1.0 khz, f dev = 3.0 khz. ml3371 at f rf = 10.7 mhz (see figure 11). pin waveform description internal equivalent circuit symbol 13 rssi rssi out 1.8 k bias 13 v cc rssi output. referred to as the received signal strength indicator or rssi. the chip sources up to 60 a over the linear 60 db range. this pin may be used many ways, such as: agc, meter drive and carrier triggered squelch circuit. 14 mute 40 k mute or sq out 14 mute output. see discussion in application text. 15 gnd gnd 15 ground. the ground area should be continuous and unbroken. in a two sided layout, the component side has the ground plane. in a one?ided layout, the ground plane fills around the traces on the circuit side of the board and is not interrupted. 16 mix in mixer in v cc 16 3.3 k 10 k mixer input series input impedance: @ 10 mhz: 309 j33 ? @ 45 mhz: 200 j13 ? *other pins are the same as pins in mc3371.
www.lansdale.com page 9 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 ml3372 pin function description operating conditions v cc = 4.0 vdc, rf in = 100 v, f mod = 1.0 khz, f dev = 3.0 khz. ml3372 at f rf = 45 mhz (see figure 13). pin symbol internal equivalent circuit description waveform 5 if in if in 5 53 k 6 if amplifier input 6 dec1 6 dec 60 a if decoupling. external 0.1 f capacitors connected to v cc . 7 if out if out 7 120 a v cc 50 a if amplifier output signal level is typically 300 mvpp. 8 quad in quad in 8 50 a v cc 10 quadrature detector input. signal level is typically 150 mvpp. 9 ra 9 200 ra out v cc recovered audio. this is a composite fm demodulated output having signal and carrier components. typical level is 800 mvpp. out 100 a the filtered recovered audio has the carrier signal removed and is typically 500 mvpp.
www.lansdale.com page 10 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 figure 9. ml3371 circuit schematic figure 10. ml3372 circuit schematic 100 a if out 8 quad in 4 v cc 5 1.8 k if in dec1 53 k 51 k x 200 9 ra out 100 a squelch out + filter out bias 12 squelch in 11 mixer out 3 bias x y x osc1 200 a 2 1 16 14 15 gnd 10 filter in meter out 13 osc2 v cc 4 y y dec2 7 mixer in 6 x 100 a squelch out + filter out bias 12 squelch in 11 mixer out 3 bias x y x osc1 200 a 2 1 16 14 15 gnd 10 filter in meter out 13 osc2 v cc 4 mixer in 8 quad in 4 v cc 5 if in dec 53 k x 200 9 ra out 100 a y y 7 6 x 10 10
www.lansdale.com page 11 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 circuit description the ml3371 and ml3372 are low power narrowband fm receivers with an operating frequency of up to 60 mhz. its low voltage design provides low power drain, excellent sensitivity, and good image rejection in narrowband voice and data link applications. this part combines a mixer, an if (intermediate frequency) limiter with a logarithmic response signal strength indicator, a quadrature detector, an active filter and a squelch trigger cir- cuit. in a typical application, the mixer amplifier converts an rf input signal to a 455 khz if signal. passing through an external bandpass filter, the if signal is fed into a limiting amplifier and detection circuit where the audio signal is recov- ered. a conventional quadrature detector is used. the absence of an input signal is indicated by the presence of noise above the desired audio frequencies. this ?oise band?is monitored by an active filter and a detector. a squelch switch is used to mute the audio when noise or a tone is present. the input signal level is monitored by a meter drive circuit which detects the amount of if signal in the limiting amplifier. legacy applications information the oscillator is an internally biased colpitts type with the collector, base, and emitter connections at pins 4, 1 and 2 respectively. this oscillator can be run under crystal control. for fundamental mode crystals use crystal characterized paral- lel resonant for 32 pf load. for higher frequencies, use 3rd overtone series mode type crystals. the coil (l2) and resistor rd (r13) are needed to ensure proper and stable operation at the lo frequency (see figure 13, 45 mhz application circuit). the mixer is doubly balanced to reduce spurious radiation. conversion gain stated in the ac electrical characteristic sta- ble is typically 20 db. this power gain measurement was made under stable conditions using a 50 ? source at the input and an external load provided by a 455 khz ceramic filter at the mixer output which is connected to the v cc (pin 4) and if input (pin 5). the filter impedance closely matches the1.8 k ? inter- nal load resistance at pin 3 (mixer output). since the input impedance at pin 16 is strongly influenced by a 3.3 k ? inter- nal biasing resistor and has a low capacitance, the useful gain is actually much higher than shown by the standard power gain measurement. the smith chart plot in figure 17 shows the measured mixer input impedance versus input frequency with the mixer input matched to a 50 ? source impedance at the given frequencies. in order to assure stable operation under matched conditions, it is necessary to provide a shunt resistor to ground. figures 11, 12 and 13 show the input networks used to derive the mixer input impedance data. following the mixer, a ceramic bandpass filter is recom- mended for if filtering (i.e. 455 khz types having a bandwidth of ?.0 khz to ?5 khz with an input and output impedance from 1.5 k ? to 2.0 k ? ). the 6 stage limiting if amplifier has approximately 92 db of gain. the mc3371 and MC3372 are different in the limiter and quadrature detector circuits. the mc3371 has a 1.8 k ? and a 51 k ? resistor providing internal dc biasing and the output of the limiter is internally connected, both directly and through a 10 pf capacitor to the quadrature detector; whereas, in the MC3372 these components are not provided internally. thus, in the mc3371, no external compo- nents are necessary to match the 455 khz ceramic filter, while in the MC3372, external 1.8 k ? and 51 k ? biasing resistors are needed between pins 5 and 7, respectively (see figures 12 and 13). in the mc3371, a parallel lcr quadrature tank circuit is connected externally from pin 8 to v cc (similar to the mc3361). in the MC3372, a quadrature capacitor is needed externally from pin 7 to pin 8 and a parallel lc or a ceramic discriminator with a damping resistor is also needed from pin 8 to v cc (similar to the mc3357). the above external quadra- ture circuitry provides 90 phase shift at the if center frequen- cy and enables recovered audio. the damping resistor determines the peak separation of the detector and is somewhat critical. as the resistor is decreased, the separation and the bandwidth is increased but the recovered audio is decreased. receiver sensitivity is dependent on the value of this resistor and the bandwidth ofthe 455 khz ceramic filter. on the chip the composite recovered audio, consisting of carrier component and modulating signal, is passed through a low pass filter amplifier to reduce the carrier component and then is fed to pin 9 which has an output impedance of 450 ? . the signal still requires further filtering to eliminate the carrier component, deemphasis, volume control, and further amplifi- cation before driving a loudspeaker. the relative level of the composite recovered audio signal at pin 9 should be consid- ered for proper interaction with an audio post amplifier and a given load element. the mc13060 is recommended as a low power audio amplifier. the meter output indicates the strength of the if level and the output current is proportional to the logarithm of the if input signal amplitude. a maximum source current of 60 ? is available and can be used to drive a meter and to detect a carri- er presence. this is referred to as a received strength signal indicator (rssi). the output at pin 13 provides a current source. thus, a resistor to ground yields a voltage proportional to the input carrier signal level. the value of this resistor is estimated by (v cc (vdc) ?1.0 v)/60 ?; so for v cc = 4.0 vdc, the resistor is approximately 50 k ? and provides a maxi- mum voltage swing of about 3.0 v. a simple inverting op amp has an output at pin 11 and the inverting input at pin 10. the noninverting input is connected to 2.5 v. the op amp may be used as a noise triggered squelch or as an active noise filter. the bandpass filter is designed with external impedance elements to discriminate between frequen- cies. with an external am detector, the filtered audio signal is checked for a tone signal or for the presence of noise above the normal audio band. this information is applied to pin 12.
www.lansdale.com page 12 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 figure 11a. typical application for ml3371 at 10.7 mhz 10 c7 0.022 vr1 (squelch control) 10 k vr2 10 k af out to audio power amp 3.3 k r8 c10 68 10.245 mhz l1 tkans9443hm 6.8 h 6% d1 + 1n5817 r5 r6 4.7 k 560 r7 r9 4.7 k 510 k 10 53 k 51 k + 8.2 h l2 1st if 10.7 mhz from input front end + t2: toko 2a6597 hk (10 mm) or 7mc?128z (7 mm) v cc = 4.0 vdc rssi output r2 10 k c8 0.22 r11 560 c9 10 r1 51 k c1 0.01 c17 0.1 c3 0.1 c4 0.001 c5 0.001 c11 220 c13 0.1 r10 39 k c14 0.1 14 13 15 16 12 11 9 24 38 567 1 oscillator murata cfu455d2 or equivalent demodulator filter mixer squelch trigger with hysteresis af limiter amp 1.8 k c12 0.1 c2 4.7 f c15 91 r3 100 k r4 1.0 k amp amp an external positive bias to pin 12 sets up the squelch trig- ger circuit such that the audio mute (pin 14) is open or con- nected to ground. if pin 12 is pulled down to 0.9 v or below by the noise or tone detector, pin 14 is internally shorted to ground. there is about 57 mv of hyteresis at pin 12 to prevent jitter. audio muting is accomplished by connecting pin 14 to the appropriate point in the audio path between pin 9 and an audio amplifier. the voltage at pin 14 should not be lower than ?.7 v; this can be assured by connecting pin 14 to the point that has no dc component. another possible application of the squelch switch may be as a carrier level triggered squelch circuit, similar to the mc3362/mc3363 fm receivers. in this case the meter output can be used directly to trigger the squelch switch when the rf input at the input frequency falls below the desired level. the level at which this occurs is determined by the resistor placed between the meter drive output (pin 13) and ground (pin 15). figure 11b shows a typical application using the ml145170/ml145170 pll device to obtain multiple channel operation. legacy applications information
www.lansdale.com page 13 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 455 khz ceramic filter volume squelch spi c23 1uf +v v2 5v c22 .001uf d1 1n914 c21 .1uf c14 .001uf c13 .022uf c12 .22uf r15 1k r14 510k r13 4.7k r12 3.3kk r11 4.7k r5 100k p1 c9 .1uf c8 .1uf c7 .1uf r1 20k c6 150pf l2 1uh +v v1 10v c5 33pf c4 33pf l1 1uh c3 47pf c2 1nf c1 15pf xta l xtal vcc mixout quad dec dec limin mixin gnd mute recaudio filin filout sqin rssi ml3371 p1 p2 p3 p4 p5 p6 p7 p8 p9 p10 p11 p12 p13 p14 p15 p16 u1 cerfil u2 c10 1nf l3 1uh d2 mv209 j2 oscin oscout refout fin din enb clk dout fr vdd phsv phsr pdout vss ld fv mc145170 p1 p2 p3 p4 p5 p6 p7 p8 p9 p10 p11 p12 p13 p14 p15 p16 u3 c20 .1uf c19 .1uf c18 1nf xtal2 1.000mhz c17 27pf c16 27pf +v v3 5v c15 .1uf r10 10k r9 3.3k r8 10k r7 2.7k r6 1meg r2 10k 40% rssi c11 .1uf r3 51k r4 10k 40% figure 11b. typical application using pll ml145170 device allowing multiple channel operation.
www.lansdale.com page 13 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 figure 12. typical application for ml3372 at 10.7 mhz 10 c7 0.022 vr1 (squelch control) 10 k vr2 10 k af out to audio power amp 3.3 k r8 c10 68 10.245 mhz l1 tkans9443hm 6.8 h 6% d1 + 1n5817 r5 r6 4.7 k 560 r7 r9 4.7 k 510 k 53 k + 8.2 h l2 1st if 10.7 mhz from input front end + v cc = 4.0 vdc rssi output r2 10 k c8 0.22 r13 560 c9 10 r1 51 k c1 0.01 c6 0.1 c3 0.1 c4 0.001 c5 c2 220 c14 14 13 15 16 12 11 9 24 38 567 1 oscillator murata cfu455d2 or equivalent demodulator filter mixer squelch trigger with hysteresis af limiter amp c15 0.1 r10 1.8k r11 51 k c12 0.1 c13 0.1 r12 4.3 k 27p murata cdb455c16 c16 91 c2 4.7 f r4 1.0 k amp amp 0.001 10 legacy applications information
www.lansdale.com page 14 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 2.0 2.5 ?0 ?0 ?0 ?0 3.5 3.0 1.5 1.0 0.5 0 ?20 ?00 ) c d v ( t u p t u o i s s r f rf = 10.7 mhz v cc = 4.0 vdc reference figure 11 figure 13. typical application for ml3372 at 45 mhz figure 14. rssi output versus rf input figure 15. rssi output versus rf input rssi output to meter (triplett ?100 kv) 3.5 3.0 murata cdb455c16 rf input (dbm) 1.5 1.0 0.5 0 ?20 100 80 ?0 40 2.5 ?0 2.0 c7 0.022 vr1 (squelch control) 10 k vr2 10 k af out to audio power amp 3.3 k r8 l1 0.245 h coilcraft 150?7j08 d1 + 1n5817 r6 4.7 k 560 r7 r9 4.7 k 510 k rf input 45 mhz + v cc = 4.0 vdc r2 12 k c8 0.22 c18 75 c9 10 r14 51 k c1 0.01 c6 0.1 c3 0.1 c4 0.001 c5 c2 4.7 r3 100 k r4 1.0 k r5 r1 470 53 k 14 13 15 16 12 11 10 9 24 38 567 1 oscillator demodulator filter mixer squelch trigger with hysteresis af limiter amp c10 30 c16 0.01 c11 5.0 r10 1.8 k r11 51 k r12 4.3 k c15 0.1 murata cfu455d2 or equivalent c13 0.1 c14 27 c12 0.1 r13 1.0 k 44.545 mhz coilcraft 143?3j12 l2 0.84 h c17 120 ) c d v ( t u p t u o i s s r + 0.001 amp amp f rf = 45 mhz v cc = 4.0 vdc reference figure 13 10 legacy applications information
www.lansdale.com page 15 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 figure 16. s + n, n, amr versus input figure 17. mixer input impedance versus frequency +j10 ?500 ?250 ?150 ?100 ?50 ?25 ?10 +j250 +j25 +j50 +j500 +j150 v cc = 4.0 vdc rf input = ?0 dbm +j100 0 10 150 500 250 25 50 n ?0 ?0 ?0 ?0 ?0 ?0 ?10 10 0 ?0 ?30 ?0 ?0 ?0 ?0 * reference figures 11, 12 and 13 rf input (dbm) s + n s + n 30% am 10.7 mhz 45 mhz ) b d ( r m a , n , n + s 100 f rf = 10.7 mhz v cc = 4.0 v t a = 25 c legacy applications information
www.lansdale.com page 16 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 figure 18. mc3371 pc board component view with matched input at 10.7 mhz figure 19. mc3371 pc board circuit or solder side as viewed through component side meter out j4 r1 c3 r9 d1 c 5 r5 r4 c17 r3 r6 vr1 v cc j3 vr2 r8 r7 c8 c7 c1 l2 c2 + c15 input if 10.7 mhz j1 l1 mc3371 if 10.7 mhz front end c14 bnc j3 xtal 10.245 mhz c10 c11 cfu 455d 2 vcc c13 mc3371 r10 j2 t2 af out bnc gnd cut .325 + c9 v cc component side r11 c16 c12 gnd r2 c4 above pc board is laid out for the circuit in figure 11. solder side cut .325 cut .325 legacy applications information
www.lansdale.com page 17 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 figure 20. MC3372p pc board component view with matched input at 10.7 mhz figure 21. MC3372p pc board circuit or solder side as viewed through component side cdb 455 c16 cfu455d2 input if 10.7 mhz c15 j3 c10 c11 vcc af out gnd cut .325 + c9 vcc component side c12 gnd cut .325 r10 r 1 1 c 1 3 meter out j4 r1 c3 r9 d1 r5 r4 c6 r3 r6 vr1 v cc j3 vr2 r8 r7 c8 c7 c1 c2 + c16 j1 l1 MC3372 if 10.7 mhz front end bnc xtal 10.245 mhz MC3372 r12 j2 bnc r13 c17 r2 c4 cut .325 c 5 l2 c14 above pc board is laid out for the circuit in figure 12. solder side legacy applications information
www.lansdale.com page 19 of 19 issue a lansdale semiconductor, inc. ml3371, ml3372 outline dimensions so 16 = -5p plastic package (ml3371-5p, ml3372-5p) case 751b?5 (so?6) issue j p dip 16 = ep plastic package (ml3371ep, ml3372ep) case 648?8 issue r notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension l to center of leads when formed parallel. 4. dimension b does not include mold flash. 5. rounded corners optional. ? b f c s h g d j l m 16 pl seating 18 9 16 k plane ? m a m 0.25 (0.010) t dim min max min max millimeters inches a 0.740 0.770 18.80 19.55 b 0.250 0.270 6.35 6.85 c 0.145 0.175 3.69 4.44 d 0.015 0.021 0.39 0.53 f 0.040 0.70 1.02 1.77 g 0.100 bsc 2.54 bsc h 0.050 bsc 1.27 bsc j 0.008 0.015 0.21 0.38 k 0.110 0.130 2.80 3.30 l 0.295 0.305 7.50 7.74 m 0 10 0 10 s 0.020 0.040 0.51 1.01 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions 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 0.127 (0.005) total in excess of the d dimension at maximum material condition. 18 16 9 seating plane f j m r x 45 g 8 pl p ? ? m 0.25 (0.010) b s ? d k c 16 pl s b m 0.25 (0.010) a s t dim min max min max inches millimeters a 9.80 10.00 0.386 0.393 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27 bsc 0.050 bsc j 0.19 0.25 0.008 0.009 k 0.10 0.25 0.004 0.009 m 0 7 0 7 p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019 lansdale semiconductor reserves the right to make changes without further notice to any products herein to improve reliabili- ty, function or design. lansdale does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. typical parameters which may be provided in lansdale data sheets and/or specifications can vary in different applications, and actual performance may vary over time. all operating parameters, including ?ypicals must be validated for each customer application by the customers technical experts. lansdale semiconductor is a registered trademark of lansdale semiconductor, inc.

▲Up To Search▲

Price & Availability of MC3372

	To Download MC3372 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .