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 attenu a tors - a n al o g - s m t 8 8 - 1 hmc812lc4 gaas mmic voltage-variable attenuator, 5 - 30 ghz v02.0911 general description features functional diagram wide bandwidth: 5 - 30 ghz e xcellent linearity: +28 dbm input ip3 high power handling: +25 dbm input p1db wide attenuation r ange: 30 db 24 lead ceramic 4x4 mm s m t package: 16mm2 electrical specifcations, t a = +25 c, 50 ohm system typical applications t he hmc812lc4 is ideal for: ? point-to-point radio ? vsat radio ? test instrumentation ? microwave sensors ? military, ecm & radar the hmc812lc4 is an absorptive voltage variable attenuator (vva) which operates from 5 - 30 ghz and is ideal in designs where an analog dc control signal must be used to control r f signal levels over a 30 db amplitude range. it features two shunt-type attenuators which are controlled by two analog vol- tages, vctrl1 and vctrl2. optimum linearity perfor- mance of the attenuator is achieved by frst varying vctrl1 of the 1st attenuation stage from -3v to 0v with vctrl2 fxed at -3v. the control voltage of the 2nd attenuation stage, vctrl2, should then be varied from -3v to 0v, with vctrl1 fxed at 0v. the hmc812lc4 is housed in a r oh s compliant 4x4 mm qfn lead- less ceramic package however, if the vctrl1 and vctrl2 pins are connected together it is possible to achieve the full analog atten- uation range with only a small degradation in input ip3 performance. applications include agc circuits and temperature compensation of multiple gain stages in microwave point-to-point and vsat radios. parameter min. t yp. max. u nits insertion loss 5 - 16 ghz 16 - 24 ghz 24 - 30 ghz 2 3 4 db db db attenuation r ange 30 db input r eturn loss 12 db o utput r eturn loss 8 db input power for 1 db compression (any attenuation) 25 dbm input t hird o rder intercept (two-tone input power = 10 dbm each tone) 28 dbm
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 attenu a tors - a n al o g - s m t 8 8 - 2 attenuation vs. vctrl2 over temperature @ 10 ghz, vctrl1 = 0v attenuation vs. frequency over vctrl vctrl1 = variable, vctrl2 = -3v attenuation vs. vctrl1 over temperature @ 10 ghz, vctrl2 = -3v attenuation vs. pin @ 10 ghz vctrl1 = variable, vctrl2 = -3v input return loss vctrl1 = variable, vctrl2 = -3v hmc812lc4 v02.0911 gaas mmic voltage-variable attenuator, 5 - 30 ghz attenuation vs. frequency over vctrl vctrl1 = 0v, vctrl2 = variable -25 -20 -15 -10 -5 0 2 6 10 14 18 22 26 30 -3.0 v -1.8 v -1.4 v -0.8 v 0.0 v attenuation (db) frequency (ghz) -15 -12 -9 -6 -3 0 -3 -2.5 -2 -1.5 -1 -0.5 0 +25 c +85 c -40 c attenuation (db) vctrl1 (v) -40 -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -1.6 v 0.0 v return loss (db) frequency (ghz) -18 -15 -12 -9 -6 -3 0 0 3 6 9 12 15 18 -3.0 v -1.8 v -1.4 v -0.8 v 0.0 v attenuation (db) input power (dbm) -35 -30 -25 -20 -15 -10 -5 0 -3 -2.5 -2 -1.5 -1 -0.5 0 +25 c +85 c -40 c attenuation (db) vctrl2 (v) -50 -40 -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -2.0 v -1.6 v -1.0 v 0.0 v attenuation (db) frequency (ghz)
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 attenu a tors - a n al o g - s m t 8 8 - 3 output return loss vctrl1 = 0v, vctrl2 = variable input ip3 vs input power @ 10 ghz vctrl1 = variable, vctrl2 = -3v input ip3 vs. input power over frequency vctrl1 = -2.2v, vctrl2 = -3v (worst case ip3) output return loss vctrl1 = variable, vctrl2 = -3v hmc812lc4 v02.0911 gaas mmic voltage-variable attenuator, 5 - 30 ghz input return loss vctrl1 = 0v, vctrl2 = variable input ip3 vs. input power over temperature @ 10 ghz, vctrl1 = -2.2v, vctrl2 = -3v -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -1.6 v 0.0 v return loss (db) frequency (ghz) -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -1.4 v 0.0 v return loss (db) frequency (ghz) 20 25 30 35 0 3 6 9 12 15 18 +25 c +85 c -40 c ip3 (dbm) single tone input power (dbm) 20 25 30 35 0 3 6 9 12 15 18 5 ghz 10 ghz 20 ghz 30 ghz ip3 (dbm) single tone input power (dbm) 10 20 30 40 50 60 0 3 6 9 12 15 18 -3.0 v -2.6 v -2.2 v -1.8 v 0.0 v ip3 (dbm) single tone input power (dbm) -40 -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -1.6 v 0.0 v return loss (db) frequency (ghz)
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 attenu a tors - a n al o g - s m t 8 8 - 4 hmc812lc4 v02.0911 gaas mmic voltage-variable attenuator, 5 - 30 ghz attenuation vs. input power over vctrl vctrl1 = vctrl2 input return loss, vctrl1 = vctrl2 output return loss, vctrl1 = vctrl2 attenuation vs. vctrl over temperature @ 10 ghz, vctrl1 = vctrl2 attenuation vs. frequency over vctrl vctrl1 = vctrl2 input ip3 vs. input power over vctrl @ 10 ghz, vctrl1 = vctrl2 -50 -40 -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -1.8 v -1.4 v -0.8 v 0.0 v attenuation (db) frequency (ghz) -50 -40 -30 -20 -10 0 0 3 6 9 12 15 18 -3.0 v -1.8 v -1.4 v -0.8 v 0.0 v attenuation (db) input power (dbm) 0 10 20 30 40 50 60 0 3 6 9 12 15 18 -3.0 v -2.6 v -2.2 v -1.8 v 0.0 v ip3 (dbm) single tone input power (dbm) -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -1.6 v 0.0 v return loss (db) frequency (ghz) -40 -30 -20 -10 0 2 6 10 14 18 22 26 30 -3.0 v -1.6 v 0.0 v return loss (db) frequency (ghz) -40 -30 -20 -10 0 -3 -2.5 -2 -1.5 -1 -0.5 0 +25 c +85 c -40 c attenuation (db) control voltage (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 attenu a tors - a n al o g - s m t 8 8 - 5 hmc812lc4 v02.0911 gaas mmic voltage-variable attenuator, 5 - 30 ghz outline drawing absolute maximum ratings electrostatic sensitive device observe handling precautions control voltages vctrl1 -3 to 0v @ 10 a vctrl2 -3 to 0v @ 10 a r f input power +30 dbm control voltage range +1 to -5v channel t emperature 150 c continuous pdiss (t = 85 c) (derate 16.4 mw/ c above 85 c) 1.07 w t hermal r esistance (channel to ground paddle) 61 c/w s torage t emperature -65 to +150 c o perating t emperature -40 to +85 c notes : 1. packag e b o dy ma ter ial: al u mi n a. 2. lead and ground paddle plating: gold flash over nickel. 3. dimensions are in inches (millimeters). 4. lead spacing tolerance is non-cumulative. 5. packag e wa r p s hall not e xc ee d 0.05mm da tu m C c C 6. all g roun d l e ad s a n d g roun d paddl e m ust b e so ld ere d to pcb r f g roun 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 attenu a tors - a n al o g - s m t 8 8 - 6 hmc812lc4 v02.0911 gaas mmic voltage-variable attenuator, 5 - 30 ghz pin n umber function description interface s chematic 1, 2, 6 - 8, 11 - 13, 17 - 24 n /c these pins are not connected internally, however these pins must be connected to r f/dc ground externally. 3, 5, 14, 16 g n d t hese pins and the exposed ground paddle must be con - nected to r f/dc ground. 4 r fi n t his pad is dc coupled and matched to 50 o hms. a blocking capacitor is required if r f line potential is not equal to 0v. 15 r f out 9 vctrl1 control voltage 1 10 vctrl2 control voltage 2 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 attenu a tors - a n al o g - s m t 8 8 - 7 hmc812lc4 v02.0911 gaas mmic voltage-variable attenuator, 5 - 30 ghz application circuit
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 attenu a tors - a n al o g - s m t 8 8 - 8 hmc812lc4 v02.0911 gaas mmic voltage-variable attenuator, 5 - 30 ghz evaluation pcb t he circuit board used in the fnal application should use r f circuit design techniques. s ignal lines should have 50 o hm impedance while the package ground leads and exposed paddle should be con - nected 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 hittite upon request. list of materials for evaluation pcb 123768 [1] item description j1, j2 2.9 mm pc mount r f connector j3, j4 dc pin c1, c2 100 pf capacitor, 0402 pkg. c3, c4 1000 pf capacitor, 0402 pkg. c5, c6 4.7 f capacitor, case a u 1 hmc812lc4 analog vva pcb [2] 123766 e valuation pcb [1] r eference this number when ordering complete evaluation pcb [2] circuit board material: arlon 25f r or r ogers 4350
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