attenuators - smt 5 5 - 72 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com hmc335g16 1db lsb gaas mmic 5-bit digital attenuator, dc - 3 ghz v00.1102 general description features functional diagram 1 db lsb steps to 31 db single control line per bit 0.5 db typical bit error 16 lead hermetic smt package electrical speci cations, t a = +25 c, vee = -5v & vctl = 0/vee typical applications the hmc335g16 is a broadband 5-bit gaas ic digital attenuator in a 16 lead glass/metal (hermetic) surface mount package. covering dc to 3 ghz, the insertion loss is less than 2.3 db typical. the attenu- ator bit values are 1 (lsb), 2, 4, 8, and 16 db for a total attenuation of 31 db. attenuation accuracy is excellent at 0.5 db typical with an iip3 of up to +44 dbm. five bit control voltage inputs, toggled between 0 and -5v, are used to select each attenuation state at less than 70 a each. a single vee bias of -5v allows operation down to dc. the hmc335g16 is ideal for: ? telecom infrastructure ? military radios, radar & ecm ? space applications ? test instrumentation parameter frequency min. typical max. units insertion loss dc - 1.5 ghz 1.5 - 3.0 ghz 2.0 2.3 2.5 2.8 db db attenuation range dc - 3 ghz 31 db return loss (rf1 & rf2, all atten. states) dc - 3 ghz 13 db attenuation accuracy: (referenced to insertion loss) 1 - 31 db states 1 - 27 db states 28 - 31 db states 1 - 23 db states 24 - 27 db states 28 - 31 db states dc - 1.0 ghz 1.0 - 2.0 ghz 1.0 - 2.0 ghz 2.0 - 3.0 ghz 2.0 - 3.0 ghz 2.0 - 3.0 ghz 0.3 + 5% of atten. setting max 0.3 + 5% of atten. setting max 0.3 + 8% of atten. setting max 0.3 + 5% of atten. setting max 0.3 + 8% of atten. setting max 0.5 + 10% of atten. setting max db db db db db db input power for 0.1 db compression 0.5 - 3.0 ghz 24 dbm input third order intercept point (two-tone input power = 0 dbm each tone) 0.5 - 3.0 ghz 44 dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) dc - 3 ghz 140 160 ns ns
attenuators - smt 5 5 - 73 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com return loss rf1, rf2 (only major states are shown) bit error vs. attenuation state insertion loss normalized attenuation (only major states are shown) bit error vs. frequency (only major states are shown) relative phase vs. frequency (only major states are shown) hmc335g16 1db lsb gaas mmic 5-bit digital attenuator, dc - 3 ghz v00.1102 -6 -5 -4 -3 -2 -1 0 0 0.5 1 1.5 2 2.5 3 3.5 4 +25c +85c -40c insertion loss (db) frequency (ghz) -3 -2 -1 0 1 2 3 0 4 8 12 16 20 24 28 32 0.12 ghz 1.0 ghz 2.0 ghz 3.0 ghz bit error (db) attenuation state (db) -20 0 20 40 60 80 100 0 0.5 1 1.5 2 2.5 3 3.5 4 1 db 2 db 4 db 8 db 16 db 31 db relatvie phase (deg) frequency (ghz) -5 -3 -1 1 3 5 0 0.5 1 1.5 2 2.5 3 3.5 4 1 db 2 db 4 db 8 db 16 db 31 db bit error (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 3.5 4 1 db 2 db 4 db 8 db 16 db 31 db normalized attenuation (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 3.5 4 1 db 2 db 4 db 8 db 16 db 31 db return loss (db) frequency (ghz)
attenuators - smt 5 5 - 74 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com truth table control voltage bias voltage & current control voltage input attenuation state rf1 - rf2 v1 16 db v2 8 db v3 4 db v4 2 db v5 1 db low low low low low reference i.l. low low low low high 1 db low low low high low 2 db low low high low low 4 db low high low low low 8 db high low low low low 16 db high high high high high 31 db max. atten. any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. state bias condition low 0 to -2v @ 70 a typ. high vee to vee + 0.8v @ 5 a typ. note: vee = -5v 10% vee range = -5.0 vdc 10% vee (vdc) lee (typ.) (ma) lee (max.) (ma) -5.0 3 6 worst case step error between successive attenuation states absolute maximum ratings control voltage (v1 - v5) vee - 0.5 vdc bias voltage (vee) -7.0 vdc storage temperature -65 to +150 c operating temperature -40 to +85 c rf input power (0.5 - 3 ghz) +26 dbm electrostatic sensitive device observe handling precautions hmc335g16 1db lsb gaas mmic 5-bit digital attenuator, dc - 3 ghz v00.1102 -3 -2 -1 0 1 2 3 0 0.5 1 1.5 2 2.5 3 3.5 4 step error (db) frequency (ghz)
attenuators - smt 5 5 - 75 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com outline drawing pin number function description interface schematic 1 vee supply voltage -5v 10% 2, 4-9, 11 gnd package bottom must also be connected to rf ground. 3, 10 rf1, rf2 these pins are dc coupled and matched to 50 ohm. blocking capacitors are required. 12-16 v1-v5 see truth table and control voltage table. pin descriptions notes: 1. package material: alumina loaded borosilicate glass. 2. leads, base, cover mateiral: kovartm (#7052 corning). 3. plating: electrolytic gold 50 microinches min., over electrolytic nickel 75 microinches min. 4. all dimensions are in inches [millimeters]. 5. tolerances: 0.005 [.013] unless otherwise specified. 6. characters to be helvetica medium .030 high, black ink, located approx. as shown. 7. all ground leads and ground paddle must be soldered to pcb rf ground. hmc335g16 1db lsb gaas mmic 5-bit digital attenuator, dc - 3 ghz v00.1102
attenuators - smt 5 5 - 76 for price, delivery, and to place orders, please contact 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 circuit dc blocking capacitors c1 & c2 are required on rf1 & rf2. choose c1 = c2 = 100 pf ~ 0.1 uf to allow lowest customer speci c frequency to pass with minimal loss. r1= 5k ohm is required to supply voltage to the circuit through either pin 3 or pin 10. suggested driver circuit (one circuit required per bit control input) simple driver using inexpensive standard logic ics provides fast switching using minimum dc current. * recommended value to suppress unwanted rf signals at v1 - v5 control lines. hmc335g16 1db lsb gaas mmic 5-bit digital attenuator, dc - 3 ghz v00.1102
attenuators - smt 5 5 - 77 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com evaluation pcb the circuit board used in the nal application should use rf circuit design techniques. signal lines should have 50 ohm impedance while the package ground leads and package bottom 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. the evaluation circuit board shown is available from hittite upon request. list of materials for evaluation pcb 106568 [1] item description j1 - j2 pcb mount sma connector j3 dc connector r1 5k ohm resistor 0402 pkg. r2 - r6 100 ohm resistor, 0402 pkg. c1, c2 0402 chip capacitor, select value for lowest frequency of operation c3 1000pf capacitor, 0603 pkg. u1 hmc335g16 digital attenuator pcb [2] 106467 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 * r2 - r6 = 100 ohm. these resistors are optional and may be used to enhance decoupling of the rf path from the control inputs. hmc335g16 1db lsb gaas mmic 5-bit digital attenuator, dc - 3 ghz v00.1102
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