View IMI145152QB_2518181.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 1 of 12 product description the imi145152 is a member of a family of phase lock loop synthesizer ics from international microcicruicts. this part is pin-for-pin compatible with the motorola mc145152 series of parts. the imi145152 is an improved version of this device, and designing to take advantage of these improvements will provide a synthesizer with noticeably improved performance. the imi145152 is programmed with parallel input data lines. since it does not require a microcontroller as serial and bus programming units do, the imi145152 is an excellent choice for synthesizers requiring independence from digital controllers. such applications particularly include fixed local oscillator si gnals, who tuning never changes, and signal sources, which have few operating frequencies. blocks in the imi145152 include a dual modulus feedback divider for use with an external dual modulus prescaler. prescaler ratios can very from 3/4 through 64/65. the reference divider is set by three select lines to one of eight rom encloded values. both counter inputs are biased for high sensitivity to sinewave input signals, and the reference divider input is also configured to operate as an osc illator if desired. the phase detector is a type iv phase-frequency design, which has inherently eliminated the dead zone and indeed any crossover distortion, as is often noticed on other pll devices. performance improvements are in the operating bandwidth and phase detector noise floor. with its extremely low phase noise floor and wider input bandwidth, prescaler ratios can be minimized to allow wide loop bandwidths for faster settlign and lower phase noise. product features ? > 150 mhz typical input frequency ? -163 dbc/hz total phaswe noise floor ? no dead zone, by design ? unambiguous pll acquisition ? parrallel programming, dual modulus pll ? 8 user-selectable reference divider ratios: 8, 64, 128, 256, 512, 1024, 1160, and 2048 ? lock detect signal ? compatible with dual-modulus prescalers from ? 3/4 to ? 64/65 ? 10-bit n counter, 6-bit a counter ? on- or off-chip reference oscillator operation ? 3-volt and 5-volt characterizations block diagram 12 x 8 rom reference decoder 12 bit /r counter control logic 10 bit /n counter 6 bit /a counter lock detect phase detector 1 26 27 4 5 6 11 12 13 14 15 16 17 18 19 20 10 25 24 22 21 23 28 8 7 9 ld phiv phir modulus control vdd = pin 3 vss = pin 2 n9 n8 n0 n1 n2 n3 n4 n5 n6 n7 a5 a4 a3 a2 a1 a0 fin oscout oscin ra0 ra1 ra2 note: n0 through n9 have pullup resistors not shown.
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 2 of 12 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, precautions should be taken to avoid application of any voltage higher than the maximum reated voltages to this circuit. for proper operation, vin and vout should be constrained to the range: v ss < (vin or vout) < v dd unused inputs must always be tied to an appropriate logic voltage level (either v ss or v dd ). pin descriptions pinno. name description 1 fin feedback divider input si g nal. applied to both the n and a positive ed g e tri gg ered counters, this si g nal is intended to be ac coupled. for cmos lo g ic level input si g nals, dc couplin g can be used. 2 vss circuit ground. 3 vdd circuit positive power supply. 4 5 6 ra0 ra1 ra2 the three reference divisor ratio select pins. pull-up resistors ra1 are included on each of these pins to insure that, if left ra2 unconnected, the y will raimain at a lo g ic one. the reference divider ratio is set accourding to the following table ra2 ra1 ra0 reference divider ratio 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 8 64 128 256 512 1024 1160 2048 7 phir phase detector output. this signal goes low when the feedback frequency is too low. 8 phiv phase detector output. this signal goes low when the feedback frequency is too high. 9 mc prescaler modulus control output si g nal. mc is high when the prescaler is to devide b y its base modulus (p). mc is low when the prescaler is to divide by p+1. 10 a5 msb of the a counter programming input bits. pull-up resistor included. 11 n0 lsb of the n counter programming input bits. pull-up resistor included.
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 3 of 12 pin descriptions (cont.) pinno. name description 12 n1 lsb + 1 of the n counter programming input bits. pull-up resistor included. 13 n2 lsb + 2 of the n counter programming input bits. pull-up resistor included. 14 n3 lsb + 3 of the n counter programming input bits. pull-up resistor included 15 n4 lsb + 4 of the n counter programming input bits. pull-up resistor included 16 n5 lsb + 5 of the n counter programming input bits. pull-up resistor included 17 n6 lsb + 6 of the n counter programming input bits. pull-up resistor included 18 n7 lsb + 7 of the n counter programming input bits. pull-up resistor included 19 n8 lsb + 8 of the n counter programming input bits. pull-up resistor included 20 n9 msb of the n counter programming input bits. pull-up resistor included 21 a1 lsb + 1 of the a counter programming input bits. pull-up resistor included 22 a2 lsb + 2 of the a counter programming input bits. pull-up resistor included 23 a0 lsb of the a counter programming input bits. pull-up resistor included 24 a3 lsb + 3 of the a counter programming input bits. pull-up resistor included 25 a4 lsb + 4 of the a counter programming input bits. pull-up resistor included 26 oscout reference signal output or output of the oscilator inverter. 27 oscin ac-coupled reference signal input or input to the oscillator inverter. 28 ld lock detect output. when the pll is locked, this si g nal will be essentiall y high, with ver y narrow ne g ative spikes at the phase detection fre q uenc y . if the pll is out of lock, this si g nal will pulse low.
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 4 of 12 pll operating characteristics vdd = 5 volts -40oc 0oc 25oc 70oc 85oc characteristics symbol min max min max min typ max min max min max unit conditions fin, sine 180 - 170 - 160 180 - 150 - 140 - mhz operating square 180 - 170 - 160 200 - 150 - 140 - mhz frequency fosc mhz modulus control prop. dealy mcpd - 6.5 - 7 - 6.8 7.5 - 8 - 8 ns dynamic synthesizer phase noise floor pdnf -160 dbc/ hz pin cin - 10 - 6 10 - 10 pf capacitance cout - 10 - 6 10 - 10 pf input vil 1 1.5 - 1.5 - 2.75 1.5 - 1.5 - 1.5 vdc voltages vih 3.5 - 3.5 - 3.5 2.75 - 3.5 - 3.5 - output vol - 0.05 - 0.05 - 0.0 0.05 - .05 - 0.05 vdc voltages voh 4.95 - 4.95 - 4.95 5.0 - 4.95 - 4.95 - static iol logic 2.4 - 2.0 2.8 - 1.6 - ma output oscout 1.2 - 2.0 1.4 - 0.8 - vol = 0.40 current ioh logic -2.4 - -2.0 -2.8 - -1.6 - ma voh = 4.0 oscout -1.2 - -1.0 -1.4 - -0.8 - ma voh = 4.0 supply idd ma fosc=fin=10 mhz currents isb - 150 - 40 150 - 150 ua fosc=fin=0 ipu 50 ua vil = 0
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 5 of 12 pll operating characteristics vdd = 3 volts -40oc 0oc 25oc 70oc 85oc characteristics symbol min max min max min typ max min max min max unit conditions fin, sine 140 - 130 - 130 140 - 120 - 110 - mhz operating square 140 - 130 - 130 150 - 120 - 110 - mhz frequency fosc mhz modulus control prop. dealy mcpd - 10 - 10.5 - 10.5 11 - 12 - 12.5 ns 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 - output vol - 0.05 - 0.05 - 0.0 0.05 - 0.05 - 0.05 vdc voltages voh 2.95 - 2.95 - 2.95 3.0 - 2.95 - 2.95 - static iol logic 1.6 - 1.4 2.0 - 0.8 - ma output oscout 0.8 - 0.7 1.0 - 0.4 - vol = 0.30 current ioh logic -1.6 - -1.4 -2.0 - -0.8 - ma voh=2.4 oscout -0.8 - -0.7 -1.0 - -0.4 - ma voh = 2.4 supply idd ma fosc=fin=10 mhz currents isb - 150 - 40 150 - 150 ua fosc=fin=0 ipu 30 ua vil = 0
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 6 of 12 -40c 25c 85c iddvs vdd fin = oscin = 10mhz idd (ma) 2.5 2 1.5 1 0.5 0 3 ? 45 67 vdd 5 vdc input sensitivity vs. temp -40 -30 -20 -10 0 10 10 40 70 100 130 160 190 mhz dbm (50 ohms) +85c +25c -40c pd linearity 5 volts 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 3 vdc input se nsitivity vs. te mp -35 -30 -25 -20 -15 -10 -5 0 5 10 0 50 100 150 200 mhz dbm (50 ohms) +85c +25c -40c pd linearity 3 volts
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 7 of 12 phase noise floor 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
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 8 of 12 dual modulus prescaling dual modulus prescaling is a widespread method used to effectively extend the operating frequency of a digital counter without sacrificing any frequency resolution. the key to understanding ths method is to remember the basics of division: when any two integers are divided, a quotient and a remainder will result. when used here in a pll, the numerator of this division is the required pll total feedback divider ratio, called n tot . the denominator is the base modulus of the dual modulus prescaler, p. the quotient is applied idrectly to the n counter, and the remainder is applied directly to the a counter. both counters count down together toward zero. while the a counter counts, the mc (modulus control) output signal is low, setting the prescaler to divide by p+1. when the a counter reaches zero, the mc output is set high while the n counter reaches zero, both counters are reset to theprogrammed inputs and the cycle is repeated. two particular things should be noticed about this process. first, the remainder counts are spread among an equal number of quotient counts by the use of the prescaler modulus p+1. when the remainder has been counted, any remaining quotient counts are handled normally by prescaling with modulus p. this counter is thus performing ntot = a(p+1) + (n-a)p some algebra on this relation yields ntot = ap + a + np - ap ntot = np + a which is just the definition of integer division. second, for this to work, there must be more quotient ocunts than remainder counts for all possible values of n tot in the synthesizer desing. if this wer enot true, then the n counter w ill reach zero and the cause the entire divider to be reset before the a counter is finished. there is a minimum value for n tot for which this requirement will always hold: n tot > p 2 -2. programming guidelines applicable to the imi145152 the system total divide value (ntotal) w ill be dictated by the application: n is the number programmed in the ? n counter; a is the number programmed into ? a counter. p and p + ! are two selectable divide ratios available in the two modulus prescaler. to have a range of ntotal values in sequence, the ? a counter is programmed from zero through p-1 for a particular value n in the n counter. n is then incremented to n + !, and the ? a is sequenced from zero through p-1 again. to maximize system frequency capab ility, the dual modulus prescalers output must go from low to high after each group of p or p + !. input cycles. the prescaler should divide by p when its modulus control line is high, and by p + 1 when its modulus control is low. a. fvco max divided by p may not exceed the frequency capability of pin 1 of the imi145152. b. the period of fvco divided by p must be greater than the sum of the times: a. propagation delay through the dual modulus prescaler. b. prescaler setup or release time relative to its modulus control signal. c. propagation time for fin to the modulus control output for the imi145152. a usefull simplication in the imi145152 programming code can be achieved by choosing the values for p of 8, 16, 32, or 64. for these cases, the desired value for n total will result when n total in binary is used as the program code to the ? n and ? a counters in the following manner. a. assume the a counter contains b bits when 2 b = p. b. always program all higher order ? a counter bits above b to zero. c. assume the ? n counter and ? a counter (with all the higher order bits above b ignored) combined into a single binary counter of 10+b bits in length. the msb of this hypothetical counter is to correspond to the lsb of ? a. the system divide value, n total , now results when the value of n total in binary is used to program the new 10+b bit counter. n total = frequency into the prescaler frequency into the phase detector = n*p + a
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 9 of 12 connections diagrams ssop, soic and pdip packages plcc package ra1 ra2 phir phiv mod control a5 n0 5 6 7 8 9 10 11 25 24 23 22 21 20 19 a4 a3 a0 a2 a1 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 ra0 pin no. 1 index typical application circuit vco 8 mhz x0 imi 145152 sp8714 fin mc fosc ra0 ra1 ra2 - + 2400 - 2483 1 mhz steps 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 ra0 ra1 ra2 phir phiv mod control a5 n0 n1 n2 n3 ld oscin oscout a4 a3 a0 a2 a1 n9 n8 n7 n6 n5 n4
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 10 of 12 package drawing and dimensions 28 pin plastic dip dimensions inches millimeters symbol min nom max min nom max a - - .180 - - 4.57 a 1 0.020 - - 0.51 - - b 0.015 0.0.8 0.020 0.38 0.46 0.51 b 1 0.045 0.050 0.055 1.14 1.27 1.40 b 2 0.035 0.040 0.045 0.89 1.02 1.14 c 0.008 0.010 0.012 0.20 0.25 0.30 d 1.360 1.365 1.370 34.54 34.67 34.80 e 0.300 - 0.325 7.62 - 8.255 e 1 0.280 0.282 0.284 7.11 7.16 7.2` e 2 0.282 0.284 0.286 7.16 7.21 7.25 e 1 0.100 bsc 2.54 bsc l 0.128 0.130 0.135 3.18 3.30 3.43 a0 7 15 0 7 15 q 1 0.055 0.060 0.065 1.40 1.52 1.65 q 2 - 130 - - 3.30 - s 0.028 0.033 0.038 0.71 0.84 0.97 28 pin ssop outline dimensions millimeters inches symbol min nom max min nom max a 0.08 0.073 0.078 1.73 1.8 1.99 a 1 0.002 0.005 0.008 0.05 0.13 0.21 a2 0.066 0.068 0.070 1.68 1.73 1.78 b 0.010 0.012 0.015 0.25 0.30 0.38 c 0.005 0.006 0.009 0.13 0.15 0.22 d 0.397 0.402 0.407 10.07 10.20 10.33 e 0.205 0.209 0.212 5.20 5.30 5.38 e 0.0256 bsc 0.65 bsc h 0.301` 0.307 0.311 7.65 7.80 7.90 a 0 4 8 0 4 8 l 0.022 0.030 0.037 0.55 0.75 0.95 e2 c a e e1 d b e a a 1 a 2 e h a l c d a1 a l b b1 e1 s q q2 b2 ssop p-dip
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 11 of 12 package drawing and dimensions (cont.) e d e d b e .045 x 45 deg chamfer pin 1 ident. .070 dia x .023 dp .045 x 45 degree corner chamfer a a 1 7 + 2 deg e 1 h h b 28 pin plcc package dimensions inches millimeters symbol min nom max min nom max a 0.147 0.152 0.157 3.73 3.86 3.99 a 1 .0085 .0100 .0115 0.215 0.254 0.292 b 0.026 0.029 0.032 0.660 0.736 0.813 b 0.013 0.017 0.021 0.330 0.432 0.533 d 0.485 0.490 0.495 12.32 12.44 12.57 e 0.443 0.448 0.453 11.25 11.38 11.51 e 1 0.410 0.420 0.430 10.41 10.67 10.92 e 0.048 0.050 0.052 1.22 1.27 1.32 h 0.448 0.453 0.458 11.38 11.51 11.63 plcc
imi145152 frequency synthesizer cmos lsi february 1996 parallel tuning pll frequency synthesizer international microcircuits, inc. 525 los coches st. milpitas, ca 95035 tel: 408-263-6300 fax 408-263-6571 page 12 of 12 package drawing and dimensions (cont.) 28 pin soic outline dimensions inches millimeters symbol min nom max min nom max a 0.097 0.101 0.104 2.46 2.56 2.64 a 1 0.005 0.009 0.0115 0.127 0.22 0.29 a2 0.090 0.092 0.094 2.29 2.34 2.39 b 0.014 0.016 0.019 0.35 0.41 0.48 c 0.0091 0.010 0.0125 0.23 0.25 0.32 d 0.701 0.706 0.711 17.81 17.93 18.06 e 0.292 0.296 0.299 7.42 7.52 7.59 e .050 bsc 1.27 bsc h 0.400 0.406 0.410 10.16 10.31 10.41 a 0 5 8 0 5 8 l 0.024 0.032 0.40 0.61 0.81 1.02 ordering information part number package type production flow imi145152xpb 28 pin plastic dip industrial, -40 c to + 85 c imi145152xxb 28 pin soic industrial, -40 c to + 85 c imi145152xqb 28 pin plcc industrial, -40 c to + 85 c imi145152xyb 28 pin ssop industrial, -40 c to + 85 c note : the x following the imi device number denotes the device revision. the ordering part number is formed by a combination of device number, device revision, package style, and screening as shown below. marking : example : imi imi145152xxb date code, lot # imisc498xxb flow b = industrial, -40 c to + 85 c package p = plastic dip x = soic q = plcc y = soic revision imi device number b e a a 1 a 2 e h a l c d soic

▲Up To Search▲

Price & Availability of IMI145152QB

	To Download IMI145152QB Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .