attenuators - smt 5 5 - 46 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 general description features functional diagram rohs compliant product 4 db lsb steps to 12 db single positive control per bit, 0/+3v 0.2 db typical bit error miniature sot 26 package: 9 mm 2 included in the hmc-dk004 designer?s kit electrical specifi cations, t a = +25 c, vdd = +3v to +5v & vctl = 0/vdd (unless otherwise stated) typical applications the hmc291 & HMC291E are general purpose broadband 2-bit positive control gaas ic digital attenuators in 6 lead sot26 surface mount plastic packages. covering 0.7 to 4 ghz, the insertion loss is typically less than 0.7 to 1.3 db. the attenuator bit values are 4 (lsb) and 8 db for a total attenuation of 12 db. accuracy is excellent at 0.2 db typical with an iip3 of up to +54 dbm. two bit control voltage inputs, toggled between 0 and +3 to +5 volts, are used to select each attenuation state at less than 50 ua each. a single vdd bias of +3 to +5 volts applied through an external 5k ohm resistor is required. the hmc291 & HMC291E are ideal for: ? cellular ? pcs, ism, mmds ? wll handset & base station 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 - 4.0 ghz 0.7 0.9 1.0 1.1 1.0 1.3 1.4 1.6 db db db db attenuation range 0.7 - 4.0 ghz 12 db return loss (rf1 & rf2, all atten. states) 0.7 - 1.4 ghz 1.4 - 4.0 ghz 14 16 17 22 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 - 4.0 ghz 0.3 + 3% of atten. setting max 0.2 + 2% of atten. setting max 0.2 + 3% of atten. setting max 0.4 + 5% of atten. setting max db db db db input power for 0.1 db compression 5v 3v 0.7 - 4.0 ghz 26 22 dbm dbm input third order intercept point (two-tone input power = 0 dbm each tone) 5v 3v 0.7 - 4.0 ghz 54 50 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) 0.7 - 4.0 ghz 560 600 ns ns 4 db lsb gaas mmic 2-bit digital attenuator, 0.7 - 4.0 ghz hmc291 / 291e v02.0402
attenuators - smt 5 5 - 47 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 insertion loss normalized attenuation note: all data typical over voltage (+3v to +5v) & temperature (-40 to +85 deg. c.). absolute bit error vs. frequency relative phase vs. frequency 4 db lsb gaas mmic 2-bit digital attenuator, 0.7 - 4.0 ghz hmc291 / 291e v02.0402 -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) -20 -10 0 10 20 30 40 50 60 0.5 1 1.5 2 2.5 3 3.5 4 4 db 8 db 12 db relative phase (deg.) frequency (ghz) 0 0.5 1 1.5 2 0.5 1 1.5 2 2.5 3 3.5 4 4 db 8 db 12 db bit error (db) frequency (ghz) 0 0.2 0.4 0.6 0.8 1 4 6 8 10 12 0.9 ghz 1.9 ghz 2.4 ghz 3.5 ghz bit error (db) attenuation state (db) -14 -12 -10 -8 -6 -4 -2 0 0.5 1 1.5 2 2.5 3 3.5 4 4 db 8 db 12 db normalized attenuation (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0.5 1 1.5 2 2.5 3 3.5 4 4 db 8 db 12 db return loss (db) frequency (ghz)
attenuators - smt 5 5 - 48 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 specifi c frequency to pass with minimal loss. r1 = 5k ohm is required to supply voltage to the circuit throught either pin 3 or pin 1. control voltage input attenuation setting rf1 - rf2 v1 8 db v2 4 db high high reference i.l. high low 4 db low high 8 db low low 12 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 4 db lsb gaas mmic 2-bit digital attenuator, 0.7 - 4.0 ghz hmc291 / 291e v02.0402
attenuators - smt 5 5 - 49 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) 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 esd sensitivity (hbm) class 1a electrostatic sensitive device observe handling precautions 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. package information part number package body material lead finish msl rating package marking hmc291 low stress injection molded plastic sn/pb solder msl1 [1] h291 xxxx HMC291E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 291e xxxx [1] max peak refl ow temperature of 235 c [2] max peak refl ow temperature of 260 c 4 db lsb gaas mmic 2-bit digital attenuator, 0.7 - 4.0 ghz hmc291 / 291e v02.0402
attenuators - smt 5 5 - 50 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 fi 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. list of materials for evaluation pcb 103372 [1] * r2 = r3 = 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 100 ohm resistor, 0402 chip c1, c2 0402 chip capacitor, select for lowest frequency of operation u1 hmc291 / HMC291E digital attenuator pcb [2] 103370 evaluation pcb 1.5 x 1.5 [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 4 db lsb gaas mmic 2-bit digital attenuator, 0.7 - 4.0 ghz hmc291 / 291e v02.0402
attenuators - smt 5 5 - 51 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: 4 db lsb gaas mmic 2-bit digital attenuator, 0.7 - 4.0 ghz hmc291 / 291e v02.0402
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