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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 limiting amplifiers - smt 6 6 - 1 HMC914LP4E v02.0311 functional diagram electrical specifcations, t a = +25 c, vcc = +3.3v t he h m c914 lp 4 e is ideal for: ? s o net / s dh-based t ransmission s ystems ? oc-192 f iber optic m odules ? 10 g igabit e thernet ? 8x and 10x f iber channel ? wideband rf g ain block s upports data r ates up to 12.5 g bps differential s mall s ignal g ain: 32 db p rogrammable l oss-of- s ignal detection ( l o s ) a utomatic output disable m ode a djustable output voltage s wing up to 750 mvp-p differential i ntegrated dc offset correction r eceived s ignal s trength i ndicator ( rssi ) output 24 l ead p lastic 4x4mm smt p ackage: 16mm2 h m c914 lp 4 e is a limiting amplifer designed to support data transmission rates up to 12.5 g bps. t he amplifer can operate over a wide range of input voltage levels and provides constant-level differential output swing. h m c914 lp 4 e features a loss of signal ( l o s ) indicator output where the input signal amplitude threshold level can be adjusted using the l o st h pin. h m c914 lp 4 e also features an output level control pin, v a c, which allows for loss compensation or for output signal level optimization. differential output signal swing can be adjusted up to 750 mvp-p. a n integrated dc offset compensation is also provided on chip. t he h m c914 lp 4 e provides an analog rssi output voltage which is proportional to input signal amplitude. a ll single-ended input signals are terminated with 50 ohms to +3.3v on-chip, and may be either a c or dc coupled. t he outputs of the h m c914 lp 4 e may be operated either differentially or single-ended. t he h m c914 lp 4 e operates from a single +3.3v dc supply and is available in a plastic r oh s compliant 4x4 mm smt package. p arameter conditions m in. t yp. m ax. units p ower s upply voltage, vcc 3 3.3 3.6 v s upply current, i cc v a c = 1v 47 m a output a mplitude control voltage, v a c 0.4 2.2 v differential s mall s ignal g ain v a c = 1v 32 db m aximum data r ate 12.5 g bps s mall s ignal bandwidth, f 3db-h 3-db cutoff frequency 9.5 g hz l ow f requency cut-off, f 3db- l 100 n f off chip cap is used 10 khz typical applications features general description 12.5 gbps limiting amplifier w/ loss of signal feature
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 limiting amplifiers - smt 6 6 - 2 HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature p arameter conditions m in. t yp. m ax. units i nput return loss, s 11 up to 12 g hz 12 db output return loss, s 22 up to 12 g hz 11 db i nput s ensitivity [1] v a c = 1v 15 mvp-p m aximum i nput s wing v a c = 1v 1200 mvp-p diff a djustable data output s wing r ange [2] v a c = 0.4v - 2.2v 240 750 mvp-p diff output p 1db [2] @ 5 g hz, v a c = 1v -9.5 dbm r ise time, tr [3] v a c = 1v, %20 to %80 29 ps f all time, tf [3] v a c = 1v, %80 to %20 29 ps a dditive rms jitter, jd [4] v a c = 1v 0.3 ps i nput referred voltage noise @ 5 g hz 3.8 nv/rthz @ 8 g hz 3.6 nv/rthz d isa b le i nput h ig h voltage, v i h 2 vcc v d isa b le i nput l ow voltage, v il 0 0.8 v a odw nen b i nput h ig h voltage, v i h 2 vcc v a odw nen b i nput l ow voltage, v il 0 0.8 v l o s assert threshold level [5] r t h = 80 kohm between l o st h and gn d, s ingle- e nded 20 mv r t h = 8.5 kohm between l o st h and vcc, s ingle- e nded 380 mv l o s a ssert/deassert t hreshold l evel [5] assert, l o st h internally set, single-ended 63 mv deassert, l o st h internally set, single-ended 110 mv l o s hysteresis [5][6] r t h between l o st h and vcc 2 4.8 db r t h between l o st h and gn d 5.8 12.2 db l o st h internally set 4.84 db l o s output h ig h voltage 1.82 kohm to vcc ( r l o s ) 3.3 v l o s output l ow voltage 1.82 kohm to vcc ( r l o s ) 2.65 v rssi s ensitivity 2.7 mv/v [1] s ignal-ended input signal level for limited output [2] s ingle-ended output [3] data a mplitude: differential 200 mvp-p, data r ate: 10 g bps pr b s 2 23 -1 pattern [4] data a mplitude: differential 200 mvp-p, data r ate: 10 g bps 10101... pattern [5] s ee application notes for detailed information [6] l o s hysteresis=20* l og( l o s deassert/ l o s assert) electrical specifcations (continued)
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 limiting amplifiers - smt 6 6 - 3 HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature differential gain & return loss vs. frequency [1] [2] dc current vs. supply voltage [1] [3] dc current vs. vac [2] [3] differential output swing vs. vac [2] [3] differential gain vs. frequency & temperature [1] [2] differential output swing vs. supply voltage [1] [3] [1] v a c = 1v [2] vcc=3.3v [3] i nput data: differential 200 mvp-p 10 g bps nr z pr b s 2 23 -1 pattern -40 -30 -20 -10 0 10 20 30 40 0 2 4 6 8 10 12 s21 s11 s22 frequency (ghz) response (db) 30 40 50 60 3 3.1 3.2 3.3 3.4 3.5 3.6 +25c +85c -40c supply voltage vcc (v) dc current (ma) 30 40 50 60 70 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 +25c +85c -40c control voltage vac (v) dc current (ma) -10 0 10 20 30 40 50 0 2 4 6 8 10 12 +25c +85c -40c frequency (ghz) gain (db) 350 400 450 500 550 600 3 3.1 3.2 3.3 3.4 3.5 3.6 +25c +85c -40c supply voltage vcc (v) differential voltage (mvp-p) 0 200 400 600 800 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 +25c +85c -40c control voltage vac (v) differential voltage (mvp-p)
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 limiting amplifiers - smt 6 6 - 4 rise time vs. vac [1] [2] rms jitter vs. vac [1] [3] fall time vs. vac [1] [2] rms jitter vs. single-ended input voltage [1] [4] [5] rssi voltage vs. single-ended input voltage [1] [4] [5] differential output swing vs. single-ended input voltage [1] [4] [5] [1] vcc = 3.3v [2] i nput data: differential 200 mvp-p 10 g bps nr z pr b s 2 23 -1 pattern [3] i nput data: differential 200 mvp-p 10 g bps 10101... pattern [4] v a c = 1v [5] f requency = 5 g hz HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature 10 20 30 40 50 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 +25c +85c -40c control voltage vac (v) rise time (ps) 0 0.1 0.2 0.3 0.4 0.5 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 +25c +85c -40c control voltage vac (v) rms jitter (ps) 100 1000 1 10 100 1000 +25c +85c -40c single-ended vin (mvp-p) differential voltage (mvp-p) 10 20 30 40 50 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 +25c +85c -40c control voltage vac (v) fall time (ps) 0 1 2 3 4 1 10 100 1000 +25c +85c -40c single-ended vin (mvp-p) rms jitter (ps) 1 1.5 2 2.5 0 100 200 300 400 500 +25c +85c -40c single-ended vin (mvp-p) rssi (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 limiting amplifiers - smt 6 6 - 5 HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature 11.25 gbps differential output eye diagram for 200 mvp-p input 10 gbps differential output eye diagram for 10 mvp-p input t ime s cale: 30 ps/div a mplitude s cale: 100 mv/div t est conditions: vcc = 3.3v, v a c = 1v data i nput: differential 200 mvp-p 11.25 g bps nr z pr b s 2 23 -1 pattern t ime s cale: 30 ps/div a mplitude s cale: 90 mv/div t est conditions: vcc = 3.3v, v a c = 1v data i nput: differential 10 mvp-p 10 g bps nr z pr b s 2 23 -1 pattern current m inimum m aximum t otal m eas e ye a mp 481 mv 481 mv 482 mv 83 r ise t ime 30.00 ps 30.00 ps 31.33 ps 83 f all t ime 28.67 ps 28.67 ps 29.33 ps 83 p-p jitter 9.333 ps 6.667 ps 9.333 ps 83 current m inimum m aximum t otal m eas e ye a mp 358 mv 358 mv 358 mv 81 r ise t ime 36.00 ps 36.00 ps 37.33 ps 81 f all t ime 35.33 ps 34.67 ps 36.00 ps 81 p-p jitter 15.333 ps 12.000 ps 15.333 ps 81 p ower s upply voltage (vcc) 3.8v to -0.5v i nput voltage ( inp - inn ) 1v to 3.3v output a mplitude control voltage (v a c) 0 to 2.4v p ower down input voltage (d isa b le ) 0 to 3.6v a uto power down enable voltage ( a o p dw nen b) 0 to 3.6v l oss of s ignal threshold programming current ( l o st h) 3 m a channel t emperature 125 c continuous p diss ( t = 85 c) (derate 13.6 mw/c above 85 c ) 0.54 w t hermal r esistance (channel to package bottom) 73.5 c/w s torage t emperature -55 to 125 c operating t emperature -40 to +85 c absolute maximum ratings
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 limiting amplifiers - smt 6 6 - 6 outline drawing p art n umber p ackage body m aterial l ead f inish msl r ating p ackage m arking [1] h m c914 lp 4 e r oh s -compliant l ow s tress i njection m olded p lastic 100% matte s n msl 1 [2] h914 xxxx [1] 4-digit lot number xxxx [2] m ax peak refow temperature of 260 c package information n o tes : 1. lea d frame material : co pper all oy 2. d imensi o ns are in in ch es [ millimeters ]. 3. lea d spa c ing to leran c e is n o n -cu m u lati v e 4. pa d bu rr lengt h s h all b e 0.15mm ma x im u m . pa d bu rr h eig h t s h all b e 0.05mm ma x im u m . 5. pa ck age w arp s h all n ot e xc ee d 0.05mm. 6. all gr ou n d lea d s an d gr ou n d pa dd le m u st b e s o l d ere d to p cb rf gr ou n d. 7. refer to h m c appli c ati o n n o te f o r s u ggeste d p cb lan d pattern . HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature
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 limiting amplifiers - smt 6 6 - 7 HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature p in n umber f unction description i nterface s chematic 1 l o s l oss of signal indicator. open collector output. r equires an external resistor to vcc. t his output sinks 500 u a dc current when input is lower than the threshold. 2, 5, 8, 9, 11, 12, 14, 17 p ackage base gn d s ignal and supply ground. 3, 4 inp , inn differential ( inp - inn ) or single-ended ( inp ) data inputs. 6 d isa b le disables output buffer. i nternally set to vcc. data outputs are enabled when d isa b le is high or foating. 7 a odw nen b e nables the automatic output disable feature. i f asserted, outputs automatically disable when the input signal is below than the programmed loss threshold. a ctive low. i nternally set to vcc. outputs enable when the input signal returns its desired swing level. 10 v a c output a mplitude control. i nternally set for 500 mv differential p-p. 13 n /c t he pins are not connected internally; however, all data shown herein was measured with these pins connected to rf /dc ground externally. 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 limiting amplifiers - smt 6 6 - 8 pin descriptions (continued) HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature p in n umber f unction description i nterface s chematic 15, 16 q n , q p differential data outputs 18, 21, 22 vcc p ower s upply (+3.3v) 19, 20 c n , c p f ilter capacitor for offset correction. 100 n f should be connected between these pins. 23 rssi r eceived s ignal s trength output. 24 l o st h l oss of signal threshold setting input. user programmable with resistor to vcc or gn d.
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 limiting amplifiers - smt 6 6 - 9 HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature evaluation pcb t he circuit board used in the application should use rf circuit design techniques. s ignal lines should have 50 ohm impedance while the package ground leads and exposed paddle 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. t he evaluation circuit board shown is available from hit - tite upon request. list of materials for evaluation pcb 128915 [1] i tem description j1 - j3 4 p in dc connector j4 - j7 sma connector tp 1 - tp 5 dc p in c1 - c2 100 n f capacitor, 0402 p kg. c3, c5, c6, c8, c10, c12 100 n f capacitor, 0402 p kg. c4, c7, c9, c11, c13 1 n f capacitor, 0402 p kg. c14 - c16 4.7 f capacitor, t antalum r 1 - r 2 4.75 kohm r esistor, 0402 p kg. r 3 - r 4 0 ohm r esistor, 0402 p kg. r 5 1.82k ohm r esistor, 0402 p kg. r 6 390 ohm r esistor, 0402 p kg. d1 le d q1 pnp t ransistor i tem description u1 h m c914 lp 4 e l imiting a mplifer p cb [2] 128913 e valuation p cb [1] r eference this number when ordering complete evaluation p cb [2] circuit board m aterial: a rlon 25 fr or r ogers 4350
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 limiting amplifiers - smt 6 6 - 10 application circuit HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature
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 limiting amplifiers - smt 6 6 - 11 HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature application information loss of signal and setting the input signal threshold t he h m c914 lp 4 e features an input signal level monitoring over a broad range. e n external resistor is used at l o st h pin to program the input signal amplitude threshold for generating the l o s output indicator. when this pin is kept foating l o st h level is set internally to single-ended 63 mvp-p. l o s is an open collector output suitable for wired-o r connection for parallel alarm signals; it requires an external pull-up resistor, rl o s . i f the input signal level drops below the asserted threshold level then, l o s output dc voltage goes low. i t goes high only when the input level exceeds the upper hysteresis threshold level. when l o st h pin is foating then the de-assert level will be single-ended 110 mvp-p. i f this function is not required, the l o s output can be left foating. i f input threshold value is desired to be higher than 63 mvp-p then an external rt h resistor should be connected between l o st h pin and vcc. desired threshold value can be obtained by changing the value of the resistor rt h as shown in the fgures below. los assert/deassert voltage vs. rth los hysteresis vs. rth 0 100 200 300 400 0 100 200 300 400 500 los assert los deassert resistor (kohm) single-ended vin (mvp-p) 0 1 2 3 4 5 0 100 200 300 400 500 hysteresis = 20*log{los deassert/los assert} resistor (kohm) single-ended vin (mvp-p)
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 limiting amplifiers - smt 6 6 - 12 HMC914LP4E v02.0311 12.5 gbps limiting amplifier w/ loss of signal feature i f input threshold value is desired to be lower than 63 mv down to 20 mvp-p then an external rt h resistor should be connected between l o st h pin and gn d. desired threshold value can be obtained by changing the value of the resistor value as shown in the fgures below. los assert/deassert voltage vs. rth los hysteresis vs. rth 0 20 40 60 80 100 120 0 100 200 300 400 500 los assert los deassert resistor (kohm) single-ended vin (mvp-p) 0 5 10 15 0 100 200 300 400 500 hysteresis = 20*log{los deassert/los assert} resistor (kohm) single-ended vin (mvp-p) automatic output disable t he h m c914 lp 4 e has two different disable features; one is manual and other is automatic. d isa b le pin provides manual control over the output. d isa b le pin is a c m o s input and active low. t here is an integrated pull-up resistor to vcc at this input. i f logic low is applied to this input, differential data outputs q p / q n are forced to vcc ensuring that no signal. i f this input is left foating or logic high is applied then data outputs are enabled. disable supply current when d isa b le =0 is 32m a . a utomatic disable mode is activated by a odw nen b c m o s input. t his input is active low. t o activate the automatic output disable mode logic 0 should be applied. when it is activated and if the input signal is below than the programmed loss threshold, differential outputs automatically goes to vcc and disabled. outputs start toggling for normal operation when the input signal returns to its desired swing level. disable supply current when a odw nen b =0 is 40m a .

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