for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com 1 - 1 1 comparators - smt the hmc875lc3c is a sige monolithic, ultra fast comparator which features reduced swing cml output drivers and clock inputs. the comparator supports 20 gbps operation while providing 120 ps clock to data output delay and 60 ps minimum pulse width with 0.2 ps rms random jitter (rj). 25 gbps operation can be achieved with reduced output voltage swing. over- drive and slew rate dispersion are typically 10 ps, making the device ideal for a wide range of applicati- ons from ate to broadband communications. the reduced swing cml output stage is designed to directly drive 400 mv into 50 ohms terminated to gnd. the hmc875lc3c features high speed latches with pro- grammable hysteresis, and is confgured to operate as a clocked comparator. general description hmc875lc3c features functional diagram propagation delay clock to output: 120 ps overdrive & slew rate dispersion: 10 ps minimum pulse width: 60 ps resistor programmable hysteresis differential clock control input bandwidth: 10 ghz power dissipation: 130 mw rspecl and rsecl versions available 16 lead 3x3mm smt package: 9mm 2 typical applications the hmc875lc3c is ideal for: ? ate applications ? high speed instrumentation ? digital receiver systems ? pulse spectroscopy ? high speed trigger circuits ? clock & data restoration electrical specifcations t a = +25c vcci= +3.3v, vcco = 0v, clk / clk = 1.6v to 2.4v, vee = -3v, v term = 0v parameter conditions min. typ. max units input voltage range -2 2 v input differential voltage -1.75 1.75 v input offset voltage 5 mv input offset voltage, temperature coefficient 15 v / c input bias current 15 ua input bias current temperature coefficient 50 na / c input offset current 4 a input impedance 50 common mode input impedance 350 k differential input impedance 15 k hysteresis rhys = 1 mv 20 gbps clocked comparator with rscml output stage v04.0810
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com comparators - smt 1 1 - 2 hmc875lc3c v04.0810 20 gbps clocked comparator with rscml output stage latch enable characteristics parameter conditions min. typ. max units clock enable input impedance each pin 50 clock to data output delay, tpd 120 ps clock enable input range 1.6 2.4 v clock max frequency, fmax 25 ghz dc output characteristics, vcco = 0v with 50 to v term = 0v parameter conditions min. typ. max units output voltage high level, voh -10 0 mv output voltage low level, vol -420 -330 mv output voltage differential swing 330 420 mv ac performance parameter conditions min. typ. max units vod dispersion 50mv < vod < 1v 10 ps tpd vs. common mode dispersion, -1.75v for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com 1 - 3 1 comparators - smt hmc875lc3c v04.0810 20 gbps clocked comparator with rscml output stage dispersion vs. overdrive voltage propagation delay vs. input common mode voltage [1] output voltage vs. temperature delay vs. temperature voltage swing vs. temperature power dissipation vs. temperature [1] vcci= +3.3v, vcco = 0v, vee = -3v, v term = 0v -1 1 3 5 7 9 11 0 10 20 30 40 50 60 70 80 90 100 rising edge falling edge dispersion (ps) overdrive voltage (mv) -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 -50 -35 -20 -5 10 25 40 55 70 85 100 voh vol voltage (v) temperature (c) 10 15 20 25 30 35 40 -50 -35 -20 -5 10 25 40 55 70 85 100 tr tf delay (ps) temperature (c) -5 -2.5 0 2.5 5 7.5 10 12.5 15 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 rising edge falling edge t pd (ps) common mode voltage (mv) 0.4 0.41 0.42 0.43 0.44 0.45 -50 -35 -20 -5 10 25 40 55 70 85 100 voltage (v) temperature (c) 100 120 140 160 180 200 -50 -35 -20 -5 10 25 40 55 70 85 100 power (mw) temperature (c)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com comparators - smt 1 1 - 4 hmc875lc3c v04.0810 20 gbps clocked comparator with rscml output stage eye diagram tj(1e-12): 6.71 ps dj?-?): 3.08 ps rj(rms): 265 fs rj(?-?): 310 fs ddj(p-p): 3.24 ps dcd: ------ pj(rms) 0.0 s isi j(p-p) 3.24 ps bit rate 5.00000 gb/s pat length 127 bits div. ratio 1:8 0 5 10 15 20 25 1 10 100 1000 hysteresis (mv) resistance (ohm) 0 2 4 6 8 10 1 10 100 hysteresis (mv) frequency (mhz) 5 10 15 20 25 30 35 40 -50 -35 -20 -5 10 25 40 55 70 85 100 i_vcco i_vee i_vcci current (ma) temperature (c) currents vs. temperature comparator hysteresis vs. rhys control resistor comparator hysteresis vs. clock frequency (rhys = ) absolute maximum ratings electrostatic sensitive device observe handling precautions input supply voltage (vcci to gnd) -0.5v to +4v output supply voltage (vcco to gnd) -0.5v to +4v positive supply differential (vcci - vcco) -0.5v to +3.5v input voltage -2v to +2v differential input voltage -2v to +2v input voltage, latch enable -0.5v to vcci +0.5v applied voltage (hys) vee to gnd maximum input current 1 ma output current 20 ma junction temperature 125c continuous pdiss (t = 85c) (derate 20.4 mw/c above 85c) 0.816 w thermal resistance (rth) (junction to lead) 49 c/w storage temperature -65c to +150c operating temperature -40c to +85c esd sensitivity (hbm) class 1a
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com 1 - 5 1 comparators - smt hmc875lc3c v04.0810 20 gbps clocked comparator with rscml output stage outline drawing notes: 1. package body material: alumina 2. lead and ground paddle plating: 30-80 microinches gold over 50 microinches minimum nickel. 3. dimensions are in inches [millimeters]. 4. lead spacing tolerance is non-cumulative. 5. package warp shall not exceed 0.05mm datum -c- 6. all ground leads must be soldered to pcb rf ground. 7. paddle must not be dc gnd. thermal dissipation path only. timing diagram
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com comparators - smt 1 1 - 6 hmc875lc3c v04.0810 20 gbps clocked comparator with rscml output stage pin descriptions pin number function description interface schematic 1 vtp termination resistor return pin for inp input. 2 inp non-inverting analog input 3 inn inverting analog input 4 vtn termination resistor return pin for inn input 5, 16 vcci positive supply voltage input stage. 6 clk clock input pin, inverting side. 7 clk clock input pin, non-inverting side. 8 clkrtn clock rtn pin, connect to gnd. 9, 12 vcco positive supply voltage for the output stage. 10 q inverting output. q bar is at logic low if the analog voltage at the non-inverting input, inp, is greater than the analog voltage at the inverting input, inn, after a positive transition on clk and negative transition on clk . 11 q non-inverting output. q is at logic high if the analog voltage at the non-inverting input, inp, is greater than the analog voltage at the inverting input, inn, after a positive transition on clk and negative transition on clk . 14 hys hysteresis control pin. this pin should be left disconnected to minimize hysteresis. connect to vee with a resistor to add the desired amount of hysteresis. 13 vee negative power supply, -3v. 15 rtn return for esd protection, connect to gnd. package base do not dc gnd. thermal dissipation path only.
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com 1 - 7 1 comparators - smt hmc875lc3c v04.0810 20 gbps clocked comparator with rscml output stage evaluation pcb front side back side
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com comparators - smt 1 1 - 8 the circuit board used in the application should use rf circuit design techniques. signal lines should have 50 ohm impedance while the package ground leads should be connected directly to the ground plane similar to that shown. the exposed paddle should not be electronically connected to dc gnd, thermal dissipation path only. a sufficient number of via holes should be used to connect the top and bottom ground planes in order to provide good rf grounding to 25 ghz. the evaluation circuit board shown is available from hittite upon request. item description j1 8 pos. vertical tin j2 - j7 2.92 mm 40 ghz jack j8 terminal strip, single row 3 pin smt jp1, jp2 2 pos. vertical tin c1 - c3, c5, c6, c8 - c10 100 pf capacitor, 0402 pkg. c4, c7, c11 330 pf capacitor, 0402 pkg. c11 - c13 4.7 uf tantalum tp1 - tp4 dc pin, swage mount u1 hmc875lc3c comparator pcb 125929 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 or arlon 25fr list of materials for evaluation pcb 125932 [1] hmc875lc3c v04.0810 20 gbps clocked comparator with rscml output stage application circuit
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