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 t he h mc 674l c 3 c is a s ige monolithic, ultra fast comparator that features reduced swing ( rs ) p e c l output drivers and latch inputs. t he comparator supports 10 gbps operation while providing 85 ps propagation delay and 60 ps minimum pulse width with 0.2 ps rms random jitter ( r j). o verdrive and slew rate dispersion are typically 10 ps, making the device ideal for a wide range of applications from at e to broadband communications. t he reduced swing p e c l output stages are designed to directly drive 400 mv into 50 o hms terminated to +1.3 v while maintaining compatibility with other p e c l logic families. t he h mc 674l c 3 c features high speed latch and programmable hysteresis and may be confgured to operate in either latch mode or as a tracking comparator. general description HMC674LC3C features functional diagram equivalent input bandwidth: 10 ghz p ropagation delay: 85 ps o verdrive & s lew r ate dispersion: 10 ps m inimum p ulse width: 60 ps r esistor p rogrammable hysteresis differential latch c ontrol p ower dissipation: 140 mw rscm l and rs e c l versions a vailable 16 lead 3 x 3 mm smt p ackage: 9 mm 2 typical applications t he h mc 674l c 3 c is ideal for: ? ate applications ? high speed instrumentation ? digital receiver systems ? pulse spectroscopy ? high speed trigger circuits ? clock & data restoration p arameter c onditions m in. t yp. m ax units input voltage r ange -2 +2 v input differential voltage -1.75 1.75 v input o ffset voltage 5 mv input o ffset voltage, t emperature c oefficient 15 v / c input bias c urrent 15 u a input bias c urrent t emperature c oefficient 50 n a / c input o ffset c urrent 4 a input impedance 50 c ommon m ode input impedance 350 k differential input impedance 15 k a ctive gain 48 db c ommon m ode r ejection r atio 80 db hysteresis r hys = 1 mv 10 ghz latched comparator with rspecl output stage v08.0811 electrical specifcations, t a = +25 c, vcci= +3.3 v, vcco = +3.3 v, vee = -3 v, v term = +1.3 v
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 HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage latch enable characteristics p arameter c onditions m in. t yp. m ax units latch enable input impedance each p in 8 k latch to o utput delay, t p l o l , t p l o h v o d = 200 mv 85 ps latch m inimum p ulse width, t p l v o d = 200 mv 20 ps latch enable input r ange v o d = 200 mv 1.6 2.4 v latch s etup t ime, t s v o d = 200 mv 45 ps latch hold t ime, t h -42 ps dc output characteristics, with 50 to vcco - 2 v p arameter c onditions m in. t yp. m ax units o utput voltage high level, voh 2.33 2.39 2.44 v o utput voltage low level, vol 1.95 2.01 2.11 v o utput voltage differential s wing 380 380 330 mv ac performance p arameter c onditions m in. t yp. m ax units p ropagation delay - t p d , t p dl , t p dh v o d = 500 mv 80 85 110 ps p ropagation delay, t emperature c oefficient 0.45 ps / c p ropagation delay s kew ( r ising to falling t ransition) v o d = 500 mv 10 ps v o d dispersion 50 mv < v o d < 1 v 10 ps t p d vs. c ommon m ode dispersion, -1.75 v 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 HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage dispersion vs. overdrive voltage propagation delay vs. common mode output voltage vs. temperature -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) -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 common mode voltage (mv) 1.8 2 2.2 2.4 2.6 2.8 -45 -32 -19 -6 7 20 33 46 59 72 85 voh vol voltage (volts) temperature (c) eye diagram comparator hysteresis vs. rhys control resistor 0 5 10 15 100 1000 10000 hysteresis (mv) resistance (ohm)
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 HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage timing diagram timing descriptions s ymbol t iming description t p dh input to output high delay p ropagation delay measured from the time the input signal crosses the reference ( the input offset voltage) to the 50% point of an output low-to-high transition. t p dl input to output low delay p ropagation delay measured from the time the input signal crosses the reference ( the input offset voltage) to the 50% point of an output high-to-low transition. t p l o h latch enable to output high delay p ropagation delay measured from the 50% point of the latch enable signal low-to-high transition to the 50% point of an output low-to-high transition. t p l o l latch enable to output low delay p ropagation delay measured from the 50% point of the latch enable signal low-to-high transition to the 50% point of an output high-to-low transition. t h m inimum hold time m inimum time after the positive transition of the latch enable signal that the input signal must remain unchanged to be acquired and held at the outputs. t p l m inimum latch enable pulse width m inimum time that the latch enable signal must be high to acquire an input signal change. t s m inimum setup time m inimum time before the positive transition of the latch enable signal that an input signal change must be present to be acquired and held at the outputs. t r o utput rise time a mount of time required to transition from a low to a high output as measured at the 20% and 80% points. t f o utput fall time a mount of time required to transition from a high to a low output as measured at the 20% and 80% points. v o d voltage overdrive difference between the input voltages v in p and v inn-
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 HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage t he h mc 674l c 3 c is a latched c omparator with 10 ghz equivalent input bandwidth. t he device is comprised of three blocks: 1) a n input amplifer, 2) a latch, and 3) a n rsp e c l o utput buffer. t he latching circuit is level sensitive, and consists of a single high-speed latch. t he h mc 674l c 3 c comparator supports 10 gb/s operation. t he minimum input data latching pulse width is 60 ps. t he h mc 674l c 3 c operates in either t rack ( t ransparent) m ode, where the output follows the logical value of the input, or the latch (hold) m ode, where the output value is held to the logical value of the comparison result of the input just prior to (le - le_bar) going hi. t rack m ode operation is selected by either 1) (le - le_bar) l o , or 2) le and le_bar inputs foating. latch m ode is selected by (le - le_bar) hi. t he input impedance of the le and le_bar inputs is 8 k ohms, but these inputs can be terminated with 50 ohm external resistors if desired. when d c coupled, the clock inputs operate at an input common mode voltage of 2 v. in this case, any termination resistors would ideally be returned to 2 v. if the clock is ac coupled to the device, the input termination resistors can be returned to ground. operational description
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 absolute maximum ratings ele ctrostat ic s en s i t ive devi c e o b s e r ve h a ndling pr e ca u t i o n s outline drawing input s upply voltage (vcci to gnd) -0.5 v to +4 v o utput s upply voltage (vcco to gnd) -0.5 v to +4 v p ositive s upply voltage differential (vcci - vcco) -0.5 v to +3.3 v input voltage -2 v to +2 v differential input voltage -2 v to +2 v input voltage, latch enable -0.5 v to vcci +0.5 v a pplied voltage (hy s ) vee to gnd m aximum input c urrent 1 m a o utput c urrent 40 m a junction t emperature 125 c c ontinuous p diss ( t = 85 c ) (derate 20.4 mw/ c above 85 c ) 0.816 w t hermal r esistance ( r th) (junction to lead) 49 c /w s torage t emperature -65 c to +150 c o perating t emperature -40 c to +85 c e s d s ensitivity (hb m ) c lass 1 a n ot e s : 1. pac k a ge b o dy mat e r i a l: a lu m in a 2. le a d a nd g ro und pa ddle p l at ing: 30-80 m i cro in c he s g o ld o ve r 50 m i cro in c he s m ini m u m ni c kel. 3. di m en s i o n s ar e in in c he s [ m illi m e t e rs ]. 4. le a d spac ing to le ra n c e i s n o n- c u m ul at ive. 5. pac k a ge w arp s h a ll n ot ex c eed 0.05 mm d at u m - c - 6. a ll g ro und le a d s m u st be so lde r ed to pc b r f g ro und. 7. p a ddle m u st be so lde r ed to v ee. HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage
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 HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage p in number function description interface s chematic 1 v tp t ermination resistor return pin for vp input. 2 in p non-inverting analog input 3 inn inverting analog input 4 v t n t ermination resistor return pin for vn input 5, 16 vcci p ositive supply voltage input stage. 6 le latch enable bar input pin, inverting side. r efer to the o perational description for more details. 7 le latch enable input pin, non-inverting side. r efer to the o perational description for more details. 8 n/ c p in is not connected inside the package. c onnect package pin to gnd for improved noise. 9, 12 vcco p ositive supply voltage for the rsp e c l output stage. 10 q inverting output. q bar is at logic low if the analog voltage at the non-inverting input, in p , is greater than the analog voltage at the inverting input, inn, provided that the comparator is in compare mode. r efer to the o perational description for more details. 11 q non-inverting output. q is at logic high if the analog voltage at the non-inverting input, in p , is greater than the analog voltage at the inverting input, inn, provided that the comparator is in compare mode. r efer to the o perational description for more details.. 14 hy s hysteresis c ontrol pin. t his pin should be left disconnected for zero hysteresis. c onnect to vee with a resistor to add the desired amount of hysteresis. r efer to hysteresis graph to determine the correct sizing of r hys hysteresis control resistor. 13 vee negative power supply, -3 v. 15 rt n r eturn for e s d protection. p ackage base exposed paddle must be connected to vee. pin descriptions
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 evaluation pcb front side back side HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage
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 - 9 1 comparators - smt HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage t he circuit board used in the application should use r f circuit design techniques. s ignal lines should have 50 o hm impedance while the pack - age ground leads should be connected directly to the ground plane similar to that shown. a sufficient number of via holes should be used to connect the top and bottom ground planes in order to provide good r f grounding to 10 ghz. t he evaluation circuit board shown is available from hittite upon request. application circuit item description j1 8 p os. vertical t in j2 - j7 2.92 mm 40 ghz jack j8 t erminal s trip, s ingle r ow 3 p in smt j p 1, j p 2 2 p os. vertical t in c 1 - c 3, c 5, c 6, c 8 - c 10 100 pf c apacitor, 0402 p kg. c 4, c 7, c 11 330 pf c apacitor, 0402 p kg. c 11 - c 13 4.7 uf t antalum tp 1 - tp 4 d c p in, s wage m ount u1 h mc 674l c 3 c c omparator pc b 125929 evaluation pc b [1] r eference this number when ordering complete evaluation pc b [2] c ircuit board m aterial: r ogers 4350 or a rlon 25f r list of materials for evaluation pcb 125932 [1]
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 - 10 notes: HMC674LC3C v08.0811 10 ghz latched comparator with rspecl output stage
|
