1 HMC291SE v05.1216 4 db lsb silicon 2-bit positive control digital attenuator, 0.7 - 4.0 ghz general description features functional diagram rohs compliant product 4 db lsb steps to 12 db single positive control per bit, 0/+3v or +5v typical step error : 0.3 db miniature sot 26 package: 9 mm 2 electrical specifcations, t a = +25c, vdd = +3v to +5v & vctl = 0/vdd (unless otherwise stated) typical applications the HMC291SE is a general purpose broadband 2-bit positive control silicon ic digital attenuator in 6 lead sot26 surface mount plastic package. the insertion loss is typically in between 0.4 db - 1 db through operating frequency range. the attenuator bit values are 4 (lsb) and 8 db for a total attenuation of 12 db. state error is excellent at 0.4 db typical with an iip3 of up to 57 dbm. two bit control voltage inputs, toggled between 0v and +3v or +5v, are used to select each attenuation state at less than 25 a each. a single vdd supply voltage of +3v to +5v applied through an external 4.7k ohm resistor is required. the HMC291SE is 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 0.5 0.5 0.6 0.8 0.65 0.65 0.7 1.32 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 20 17 25 27 db db state error 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 (0.1 + 4% of atten. setting max) (0.2 + 2% of atten. setting max) (0.4 + 3% of atten. setting max) (0.4 + 4% of atten. setting max) db db db db input power for 0.1 db compression (input p0.1db) 5v [1] 3v 0.7 - 4.0 ghz 28 27 dbm dbm input third order intercept point (iip3) (two-tone input power = 15 dbm each tone) 5v 3v 0.7 - 4.0 ghz 52 52 57 54 59 56 dbm dbm switching characteristics t rise , t fall (10/90% rf) t on , t off (50% ctl to 10/90% rf) 0.7 - 4.0 ghz 250 300 ns ns [1] compression point is above maximum input power attenuators - analog - smt for price, delivery, and to place orders: analog devices, inc., one technology way, p.o. box 9106, norwood, ma 02062-9106 phone: 781-329-4700 ? order online at www.analog.com application support: phone: 1-800-analog-d information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifcations subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners.
2 HMC291SE v05.1216 4 db lsb silicon 2-bit positive control digital attenuator, 0.7 - 4.0 ghz state error vs. attenuation state return loss rf1, rf2 insertion loss normalized attenuation vs. attenuation state step error vs. frequency relative phase vs. frequency -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 +25c +85c -40c insertion loss (db) frequency (ghz) -20 -10 0 10 20 30 40 50 60 4 db 8 db 12 db 0.511.522.533.54 relative phase (deg.) frequency (ghz) -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.5 1 1.5 2 2.5 3 3.5 4 4 db 8 db 12 db step error (db) frequency (ghz) -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.5 1 1.5 2 2.5 3 3.5 4 4 db 8 db 12 db state error (db) frequency (ghz) -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) -45 -40 -35 -30 -25 -20 -15 -10 0.5 1 1.5 2 2.5 3 3.5 4 rf1 - il rf1 - 4 db rf1 - 8 db rf1 - 12 db rf2 - il rf2 - 4 db rf2 - 8 db rf2 - 12 db return loss (db) frequency (ghz) for price, delivery, and to place orders: analog devices, inc., one technology way, p.o. box 9106, norwood, ma 02062-9106 phone: 781-329-4700 ? order online at www.analog.com application support: phone: 1-800-analog-d attenuators - analog - smt
3 HMC291SE v05.1216 4 db lsb silicon 2-bit positive control digital attenuator, 0.7 - 4.0 ghz iip3 vs. frequency at 5v over temperature input p0.1db vs. frequency at 5v over temperature [1] input p0.1db vs. frequency at 3v over temperature iip3 vs. frequency at 3v over temperature 20 21 22 23 24 25 26 27 28 29 30 +25c +85c -40c 0.7 1 1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4 input compression (dbm) frequency (ghz) 20 21 22 23 24 25 26 27 28 29 30 +25c +85c -40c 0.7 1 1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4 input compression (dbm) frequency (ghz) 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 +25c +85c -40c 0.7 1 1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4 iip3 (dbm) frequency (ghz) 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 +25c +85c -40c 0.7 1 1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4 iip3 (dbm) frequency (ghz) [1] input p0.1db is limited by maximum test power of 28 dbm. for price, delivery, and to place orders: analog devices, inc., one technology way, p.o. box 9106, norwood, ma 02062-9106 phone: 781-329-4700 ? order online at www.analog.com application support: phone: 1-800-analog-d attenuators - analog - smt
4 HMC291SE v05.1216 4 db lsb silicon 2-bit positive control digital attenuator, 0.7 - 4.0 ghz application circuit dc blocking capacitors c1 and c2 are required on rf1 and rf2. choose c1 = c2 = 100 ~ 300 pf to allow lowest frequency of operation to pass with minimal loss. r1 = 4.7k ohm is required to supply voltage to the circuit through either pin 3 or pin 1. the circuit board used in the application should use rf circuit design techniques. signal lines should have 50 ohm impedance while the package 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 circuit board as shown is available from analog devices upon request. list of materials for evaluation pcb ev1HMC291SE [1] item description j1 - j2 pcb mount sma connector j5 - j8 dc pin r1 4.7 kohm resistor, 0402 pkg. c1, c2 0402 pkg. capacitor, select for lowest frequency of operation c3 1 nf capacitor, 0402 pkg. u1 HMC291SE 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 evaluation circuit board for price, delivery, and to place orders: analog devices, inc., one technology way, p.o. box 9106, norwood, ma 02062-9106 phone: 781-329-4700 ? order online at www.analog.com application support: phone: 1-800-analog-d attenuators - analog - smt
5 HMC291SE v05.1216 4 db lsb silicon 2-bit positive control digital attenuator, 0.7 - 4.0 ghz control & bias voltages truth table absolute maximum ratings outline drawing control voltage input (vctl) 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 at 500 a max. high vdd 0.2v at 550 a max. note: vdd = +3v to 5v with 0.2v tolerance control voltage (v1, v2) vdd + 0.5 vdc rf input power +28 dbm bias voltage (vdd) +8.0 vdc storage temperature -65 c to +150 c operating temperature -40 c to +85 c esd sensitivity (hbm) class 1c esd sensitivity (ficdm) class iv electrostatic sensitive device observe handling precautions notes: 1. package body material: low stress injection molded plastic silica and silicon impregnated. 2. lead material: copper alloy. 3. lead plating: 100% matte tin. 4. dimensions are in inches [millimeters]. 5. characters to be helvetica medium, .030 high, laser or white ink, located approximately as shown. 6. dimension does not include moldflash of 0.15mm per side. 7. dimension does not include moldflash of 0.25mm per side. 8. all ground leads must be soldered to pcb rf ground. package information part number package body material lead finish msl rating package marking [1] HMC291SE rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 291s xxxx [1] xxxx 4 digit lot number is on the bottom of package [2] max peak refow temperature of 260c for price, delivery, and to place orders: analog devices, inc., one technology way, p.o. box 9106, norwood, ma 02062-9106 phone: 781-329-4700 ? order online at www.analog.com application support: phone: 1-800-analog-d attenuators - analog - smt
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