imi145151 frequency synthesizer cmos lsi parallel programmed pll frequency synthesizer international microcircuits, inc. 525 los coches st. rev 2.0 9/9/97 milpitas, ca 95035 tel: 408-263-6300 ext. 276 fax 408-263-6571 page 1 of 7 product description the imi145151 is a member of a family of phaselock loop synthesizer ics from international microcircuits. the imi145151 is an improved version of the motorola mc145151 and will provide a synthesizer with noticeably improved performance. the imi145151 is programmed with parallel input data lines. since it does not require a microcontroller as serial and bus programmed units do, the imi145151 is an excellent choice for synthesizers requiring independence from digital controllers. such applications include fixed local oscillator signals, whose tuning never changes, and signal sources, which have few operating frequencies. blocks in the imi145151 include a programmable feedback divider, a reference divider, phase detector, and charge pump. the reference divider is programmed by three select lines to one of eight rom encoded values. both counter inputs are biased for maximum sensitivity to sinewave input signals. the reference divider input is also configured to operate as a crystal oscillator if desired. the imi145151 has a type iv phase frequency detector which has eliminated by the design the inherent dead zone which causes crossover distortion at the critical center lock point. the imi circuitry enables consistent low noise loop designs using the simple single ended charge pump output. differential charge pump outputs are also provided for those who require a more sophisticated differential active loop filter design. performance improvements are in the operating bandwidth and phase detector noise floor. with its extremely low phase noise foor and wider input bandwith, prescaler ratios can be minimized to allow wide loop bandwidths for faster settling and lower phase noise. product features ? >200 mhz typical input frequency. ? -163 dbc/hz total phase noise floor. ? no dead zone, by design. ? unambiguous pll acquisition. ? 8 user-selectable reference divider ratios: 8, 128, 256, 512, 1024, 2048, 2410, 8192. ? lock detect signal. ? 14 bit n counter. divider range = 3 to 16383. ? on- or off-chip reference oscillator operation. ? 3-volt and 5-volt characterizations. block diagram 14x8 rom reference decoder 14 bit /8 counter 14 bit /n counter transmit offset adder 23 22 25 24 20 19 18 17 16 15 14 13 12 11 n13 n12 n11 n10 n9 n8 n7 n6 n5 n4 n3 n2 n1 n0 5 6 7 27 26 1 21 lock detect phase detector a phase detector b 28 4 9 8 10 vdd = pin 3 vss = pin 2 ld pdout phiv phir fv note: n0 through n13 inputs have pullup resistors not shown. ra0 ra1 ra2 oscin oscout fin t/r
imi145151 frequency synthesizer cmos lsi parallel programmed pll frequency synthesizer international microcircuits, inc. 525 los coches st. rev 2.0 9/9/97 milpitas, ca 95035 tel: 408-263-6300 ext. 276 fax 408-263-6571 page 2 of 7 pin descriptions pin no. name description 1 fin rf input signal. applied to both the n and a counters. this signal is intended to be ac coupled for low level sinewave input signals. for cmos logic level input signals, dc coupling can be used. 2 vss circuit ground. 3 vdd circuit-positive power supply. 4 pdout single-ended charge pump output, usually used with passive loop filters. this signal operates according to the following: ? frequency fv>fr at the phase detector: negative pulses. ? frequency fv imi145151 frequency synthesizer cmos lsi parallel programmed pll frequency synthesizer international microcircuits, inc. 525 los coches st. rev 2.0 9/9/97 milpitas, ca 95035 tel: 408-263-6300 ext. 276 fax 408-263-6571 page 3 of 7 maximum ratings voltage relative to vss: -0.3v to 7v voltage relative to vdd: 0.3v storage temperature: -65 c to 150 c ambient temperature: -55 c to 125 c this device contains circuitry to protect the inputs against damage due to high static voltages or electric field; however, precaustions should be taken to avoid application of any voltage higher than the maximum rated voltages to this circuit. for proper operation, vin and vout should be constrained to the range: vss<(vin or vout) imi145151 frequency synthesizer cmos lsi parallel programmed pll frequency synthesizer international microcircuits, inc. 525 los coches st. rev 2.0 9/9/97 milpitas, ca 95035 tel: 408-263-6300 ext. 276 fax 408-263-6571 page 4 of 7 pll operating characteristics vdd = 3 volts -40 c0 c25 c70 c85 c characteristic symbol min max min max min typ max min max min max unit conditions operating fin sin 160 - 140 - 130 150 - 120 - 110 - mhz frequency square 160 - 140 - 130 150 - 120 - 110 - mhz fosc mhz dynamic synthesizer phase noise floor pdnf -155 dbc/ hz pin cin - 10 - 6 10 - 10 pf capacitance cout - 10 - 6 10 - 10 pf input vil - 0.9 - 1.35 0.9 - 0.9 vdc voltages vih 2.1 - 2.1 1.65 - 2.1 - vdc output vol - 0.05 - 0.05 - 0.0 0.05 - .05 - 0.05 vdc voltages voh 2.95 - 2.95 - 2.95 3.0 - 2.95 - 2.95 - vdc static iol logic 1.6 - 1.4 2.0 - 0.8 - vol = 0.30 output oscout 0.8 - 0.7 1.0 - 0.4 - ma current ioh logic -1.6 - -1.4 -1.0 - -0.8 - ma voh = 2.4 oscout -0.8 - -0.7 -1.0 - -0.4 - ma voh = 2.4 charge pump current 5.0 ma vdd = 3.0v supply idd ma fosc=fin= 10 mhz currents isb - 150 - 40 150 - 150 ua fosc=fin=0 ipu 30 ua vil = 0 5 vdc input sensitivity vs. temp -40 -30 -20 -10 0 10 20 10 30 50 70 90 110 130 150 170 190 mhz dbm (50 ohms) +85c +25c -40c 3 vdc input sensitivity vs. temp -25 -20 -15 -10 -5 0 5 0 50 100 150 200 mhz dbm (50 ohms) +85c +25c -40c
imi145151 frequency synthesizer cmos lsi parallel programmed pll frequency synthesizer international microcircuits, inc. 525 los coches st. rev 2.0 9/9/97 milpitas, ca 95035 tel: 408-263-6300 ext. 276 fax 408-263-6571 page 5 of 7 -40c 25c 85c iddvs vdd fin = oscin = 10mhz idd (ma) 2.5 2 1.5 1 0.5 0 3? 4 5 6 7 vdd power consumption vs. frequency idd (ma) 5 vdc 3 vdc operating frequency (mhz) 6 5 4 3 2 1 0 0 10 20 30 40 phase noise floor fosc = 1 mhz fref = 125 khz fin = 145 mhz n = 1160 measured floor @ 500 hz = -102 dbc/hz -20 log (n) = - 61 db - 163 dbc/hz 152/hp 10811a ref vs 8662 loop/residual noise @ 145 mhz ( hp ) 3018r carrier: 145.e+6 hz 8 nov 1994 13:07:47 - 13:16:37 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -120 -130 -140 -150 -160 -160 -170 10 100 1k 10k 1m 100k 10m
imi145151 frequency synthesizer cmos lsi parallel programmed pll frequency synthesizer international microcircuits, inc. 525 los coches st. rev 2.0 9/9/97 milpitas, ca 95035 tel: 408-263-6300 ext. 276 fax 408-263-6571 page 6 of 7 connection diagrams ssop, soic and pdip packages plcc package ra0 ra1 ra2 phir phiv fv n0 5 6 7 8 9 10 11 25 24 23 22 21 20 19 n11 n10 n13 n12 t/r n9 n8 18 17 16 15 14 13 12 26 27 28 1 2 3 4 n7 n6 n5 n4 n3 n2 n1 oscout oscin ld fin vss v dd pdout pin no. 1 index 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 fin vss v dd pdout ra0 ra1 ra2 phir phiv fv n0 n1 n2 n3 ld oscin oscout n11 n10 n13 n12 t/r n9 n8 n7 n6 n5 n4
imi145151 frequency synthesizer cmos lsi parallel programmed pll frequency synthesizer international microcircuits, inc. 525 los coches st. rev 2.0 9/9/97 milpitas, ca 95035 tel: 408-263-6300 ext. 276 fax 408-263-6571 page 7 of 7 ordering information part number package type production flow imi145151xpb plastic dip commercial, 0 c to +70 c imi145151xxb soic commercial, 0 c to +70 c imi145151xyb ssop commercial, 0 c to +70 c imi145151xqb plcc commercial, 0 c to +70 c *please contact factory for other options. note : the x following the imi device number denotes the device revision. the ordering part number is formed by a combinationof device number, device revision, package style, and screening as shown below. marking : example: imi 145151xpb date code, lot # imi145151xpb flow b = commercial, 0c to + 70c package p = plastic dip x = small outline y = ssop q = plcc revision imi device number
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