attenuators - smt 5 5 - 34 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 2 db lsb gaas mmic 3-bit digital attenuator, 0.7 - 3.7 ghz general description features functional diagram 2 db lsb steps to 14 db single positive control per bit monotonic: 03 db bit error typical miniature msop-8 package, 14.8mm 2 electrical speci cations, t a = +25 c, vdd = +3v to +5v & vctl = 0/vdd (unless otherwise stated) typical applications the hmc288ms8 & hmc288ms8e are broadband 3-bit positive control gaas ic digital attenuators in 8 lead msop surface mount plastic packages. cover- ing 0.7 to 3.7 ghz, the insertion loss is typically less than 1.2 to 1.8 db. the attenuator bit values are 2 (lsb), 4, and 8 db for a total attenuation of 14 db. accuracy is excellent at 0.3 db typical with an iip3 of up to +51 dbm. three bit control voltage inputs, toggled between 0 and +3 to +5v, are used to select each attenuation state at less than 50 ua each. a sin- gle vdd bias of +3 to +5v applied through an external 5k ohm resistor is required while occupying less than 14.8 mm2. the hmc288ms8 / hmc288ms8e is ideal for: ? cellular ? pcs, ism, mmds ? wll applications parameter frequency min. typical max. units insertion loss 0.7 - 1.4 ghz 1.4 - 2.3 ghz 2.3 - 2.7 ghz 2.7 - 3.7 ghz 1. 0 1. 3 1. 5 1. 7 1. 4 1. 7 2.0 2.3 db db db db attenuation range 0.7 - 3.7 ghz 14 db return loss (rf1 & rf2, all atten. states) 0.7 - 1.4 ghz 1.4 - 2.3 ghz 2.3 - 2.7 ghz 2.7 - 3.7 ghz 14 11 10 9 17 15 14 12 db db db db attenuation accuracy: (referenced to insertion loss) all attenuation states all attenuation states all attenuation states all attenuation states 0.7 - 1.4 ghz 1.4 - 2.3 ghz 2.3 - 2.7 ghz 2.7 - 3.7 ghz 0.3 + 3% of atten. setting max 0.2 + 3% of atten. setting max 0.3 + 3% of atten. setting max 0.3 + 4% of atten. setting max db db db db input power for 0.1 db compression 5v 3v 0.7 - 3.7 ghz 25 22 dbm dbm input third order intercept point (two-tone input power = 0dbm each tone) 5v 3v 0.7 - 3.7 ghz 51 47 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) 0.7 - 3.7 ghz 560 600 ns ns hmc288ms8 / 288ms8e v01.0705
attenuators - smt 5 5 - 35 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 absolute bit error vs. attenuation state return loss rf1, rf2 (only major states are shown) insertion loss normalized attenuation (only major states are shown) note: all data typical over voltage (+3v to +5v) & temperature (-40 to +85 deg. c.). absolute bit error vs. frequency (only major states are shown) relative phase vs. frequency (only major states are shown) 2 db lsb gaas mmic 3-bit digital attenuator, 0.7 - 3.7 ghz hmc288ms8 / 288ms8e v01.0705 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 +25 c -40 c +85 c insertion loss (db) frequency (ghz) 0 0.3 0.6 0.9 1.2 1.5 2468101214 0.9 ghz 1.9 ghz 2.4 ghz 3.5 ghz bit error (db) attenuation state (db) -16 -14 -12 -10 -8 -6 -4 -2 0 0.5 1 1.5 2 2.5 3 3.5 4 2 db 4 db 8 db 14 db normalized attenuation (db) frequency (ghz) -20 0 20 40 60 0.5 1 1.5 2 2.5 3 3.5 4 2 db 4 db 8 db 16 db relative phase (deg.) frequency (ghz) 0 0.3 0.6 0.9 1.2 1.5 0.5 1 1.5 2 2.5 3 3.5 4 2 db 4 db 8 db 14 db bit error (db) frequency (ghz) -25 -20 -15 -10 -5 0 0.5 1 1.5 2 2.5 3 3.5 4 2 db 4 db 8 db 14 db return loss (db) frequency (ghz)
attenuators - smt 5 5 - 36 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 control & bias voltages truth table application circuit dc blocking capacitors c1 & c2 are required on rf1 & rf2. choose c1 = c2 = 100 ~ 300 pf to allow lowest customer speci c frequency to pass with minimal loss. r1 = 5k ohm is required to supply voltage to the circuit throught either pin 5 or pin 8. control voltage input attenuation setting rf1 - rf2 v1 8 db v2 4 db v3 2 db high high high reference i.l. high high low 2 db high low high 4 db low high high 8 db low low low 14 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 +0.2v @ 20 ua max. high vdd 0.2v @ 50 ua max note: vdd = +3v to 5v 0.2v 2 db lsb gaas mmic 3-bit digital attenuator, 0.7 - 3.7 ghz hmc288ms8 / 288ms8e v01.0705
attenuators - smt 5 5 - 37 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 absolute maximum ratings outline drawing control voltage (v1, v2, v3) vdd + 0.5 vdc bias voltage (vdd) +8.0 vdc storage temperature -65 to +150 c operating temperature -40 to +85 c rf input power (0.7 - 4 ghz) +28 dbm notes: 1. leadframe material: copper alloy 2. dimensions are in inches [millimeters] 3. dimension does not include moldflash of 0.15mm per side. 4. dimension does not include moldflash of 0.25mm per side. 5. all ground leads must be soldered to pcb rf ground. electrostatic sensitive device observe handling precautions part number package body material lead finish msl rating package marking [3] hmc288ms8 low stress injection molded plastic sn/pb solder msl1 [1] h288 xxxx hmc288ms8e rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] h288 xxxx [1] max peak re ow temperature of 235 c [2] max peak re ow temperature of 260 c [3] 4-digit lot number xxxx package information 2 db lsb gaas mmic 3-bit digital attenuator, 0.7 - 3.7 ghz hmc288ms8 / 288ms8e v01.0705
attenuators - smt 5 5 - 38 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 circuit board the circuit board used in the nal application should use rf circuit design techniques. signal lines should have 50 ohm 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. the evaluation cir- cuit board as shown is available from hittite micro- wave corporation upon request. * r2 = r3 = r4 = 100 ohm. these resistors are optional and may be used to enhance decoupling of the rf path from the control inputs. item description j1 - j2 pcb mount sma connector j3 - j6 dc pin r1 5k ohm resistor, 0402 chip r2, r3, r4 100 ohm resistor, 0402 chip c1, c2 0402 chip capacitor, select for lowest fre- quency of operation u1 hmc288ms8 / hmc288ms8e digital attenuator pcb [2] 103141 evaluation pcb 1.5 x 1.5 [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 list of materials for evaluation pcb 103143 [1] 2 db lsb gaas mmic 3-bit digital attenuator, 0.7 - 3.7 ghz hmc288ms8 / 288ms8e v01.0705
attenuators - smt 5 5 - 39 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 notes: 2 db lsb gaas mmic 3-bit digital attenuator, 0.7 - 3.7 ghz hmc288ms8 / 288ms8e v01.0705
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