attenuators - smt 5 5 - 156 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 single positive voltage control: 0 to +3v high attenuation range: 48 db @ 0.9 ghz high p1db compression point: +15 dbm ultra small package: msop8 replaces hmc173ms8 electrical speci cations, t a = +25 c, vdd = +3.3 vdc, 50 ohm system typical applications the HMC473MS8 & HMC473MS8e are general purpose absorptive voltage variable attenuators in 8-lead msop packages. the devices operate with a +3.3v supply voltage and a 0 to +3v control voltage. unique features include a high dynamic attenuation range of up to 48 db and excellent power handling performance through all attenuation states. the HMC473MS8 & HMC473MS8e are ideal for operation in wireless applications from 0.45 to 1.6 ghz. operation from 1.7 to 2.2 ghz is possible with a reduced maximum attenuation of 29 to 32 db. improved control voltage linearity vs. attenuation can be achieved with an external driver circuit. the HMC473MS8 / HMC473MS8e is ideal for: ? cellular, umts/3g infrastructure ? portable wireless ? gps parameter min. typ. max. units insertion loss (min. atten.) (vctl = 0.0 vdc) 0.45 - 0.8 ghz 0.8 - 1.0 ghz 1.0 - 1.6 ghz 1.6 - 2.0 ghz 2.0 - 2.2 ghz 1. 8 1. 9 2.4 2.8 3.0 2.2 2.3 2.9 3.3 3.5 db db db db db attenuation range (vctl = 0 to +3 v) 0.45 - 0.8 ghz 0.8 - 1.0 ghz 1.0 - 1.6 ghz 1.6 - 2.0 ghz 2.0 - 2.2 ghz 34 43 32 27 24 39 48 37 32 29 db db db db db return loss (vctl = 0 to +3 v) 0.45 - 0.8 ghz 0.8 - 1.0 ghz 1.0 - 1.6 ghz 1.6 - 2.0 ghz 2.0 - 2.2 ghz 15 14 11 10 9 db db db input power for 0.1 db compression (0.9 ghz) min atten. atten. >2.0 20 5.5 dbm dbm input power for 1.0 db compression (0.9 ghz) min atten. atten. >2.0 24 11 28 15 dbm dbm input third order intercept (0.9 ghz, two-tone input power = +5.0 dbm each tone) min atten. atten. >2.0 47 20 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) 0.45 - 2.2 ghz 1.3 1. 5 s s gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
attenuators - smt 5 5 - 157 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 insertion loss vs. temperature input ip3 vs. control voltage @ 0.9 ghz input ip3 vs. control voltage @ 1.9 ghz -5 -4 -3 -2 -1 0 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 +25 c +85 c -40 c insertion loss (db) frequency (ghz) 15 20 25 30 35 40 45 50 55 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c input ip3 (dbm) control voltage (v) 15 20 25 30 35 40 45 50 55 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c input ip3 (dbm) control voltage (v) input ip3 vs. control voltage @ 2.1 ghz 15 20 25 30 35 40 45 50 55 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c input ip3 (dbm) control voltage (v) 15 20 25 30 35 40 45 50 55 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c input ip3 (dbm) control voltage (v) input ip3 vs. control voltage @ 0.45 ghz return loss vs. control voltage -25 -20 -15 -10 -5 0 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0 v (worse case) 1.0 v 1.8 v 2.0 v 3.0 v return loss (db) frequency (ghz) gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
attenuators - smt 5 5 - 158 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 relative attenuation vs. control voltage @ 0.9 ghz relative attenuation vs. control voltage @ 1.9 ghz return loss vs. control voltage @ 0.9 ghz return loss vs. control voltage @ 1.9 ghz -60 -50 -40 -30 -20 -10 0 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c attenuation (db) control voltage (v) -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 +25 c +85 c - 40 c attenuation (db) control voltage (v) -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 +25 c +85c -40 c return loss (db) control voltage (v) -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c return loss (db) control voltage (v) -45 -36 -27 -18 -9 0 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c attenuation (db) control voltage (v) relative attenuation vs. control voltage @ 0.45 ghz -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c return loss (db) control voltage (v) return loss vs. control voltage @ 0.45 ghz gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
attenuators - smt 5 5 - 159 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 relative attenuation vs. control voltage @ 2.1 ghz return loss vs. control voltage @ 2.1 ghz -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c attenuation (db) control voltage (v) -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c return loss (db) control voltage (v) worse case input p1db vs. temperature 5 10 15 20 25 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 +25 c +85 c -40 c input p1db (dbm) frequency (ghz) relative attenuation vs. control voltage -70 -60 -50 -40 -30 -20 -10 0 0.4 0.7 1 1.3 1.6 1.9 2.2 1.0 v 1.5 v 1.6v 1.7 v 1.8 v 2.0 v 3.0 v attenuation (db) frequency (ghz) gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
attenuators - smt 5 5 - 160 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 control and bias voltage absolute maximum ratings v ctl -0.2 vdc to vdd vdd +8 vdc maximum input power vdd = +3.3 vdc +29 dbm +21 dbm min. atten. attenuation >2 db channel temperature (tc) 150 c thermal resistance (r th ) (junction to lead) 92 c/w storage temperature -65 to +150 c operating temperature -40 to +85 c esd sensitivity (hbm) class 1a v ctl 0 to +3 vdc @ 1 a vdd +3.3 vdc 0.1 vdc @ 10 a 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. part number package body material lead finish msl rating package marking [3] HMC473MS8 low stress injection molded plastic sn/pb solder msl1 [1] h473 xxxx HMC473MS8e rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] h473 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 gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
attenuators - smt 5 5 - 161 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 pin descriptions pin number function description interface schematic 1, 8 rf1, rf2 these pins are dc coupled and matched to 50 ohms. dc blocking capacitors are required. 330pf capacitors are supplied on evaluation board. 2, 7 gnd pins must connect to rf ground. 3 vctl control voltage 4, 5 n/c no connection. these pins may be connected to rf ground. performance will not be affected. 6vdd supply voltage. gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
attenuators - smt 5 5 - 162 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 attenuation linearizing control circuit for the HMC473MS8 / HMC473MS8e voltage variable attenuator a driver circuit to improve the attenuation linearity of the HMC473MS8 & HMC473MS8e can be implemented with a simple op-amp con guration. a breakpoint linearization circuit will scale the voltage supplied to the control line of the HMC473MS8 & HMC473MS8e, so that a more linear attenuation vs. control voltage slope can be achieved. a -3.3v and +3.3v supply is required. diode and resistor values which de ne the op-amp gain, and breakpoint were selected to optimize a measured production lot of attenuators at 0.9 ghz. r7 may be varied to optimize the performance of any given attenuator. if the input voltage to the linearizing circuit will not drop below 1.0v, the r9 and d2 may be omitted, and this will greatly reduce the overall power consumption of the driver circuit. the linearizing circuit has been optimized for 0.9 ghz attenuation applications. a similar approach may be used at other frequencies by adjusting r1 - r9 resistor values . required parts list application circuit part description manufacturer ad822 op-amp analog devices r1 10k ohms panasonic r2 200k ohms panasonic r3 7.5k ohms panasonic r4 39k ohms panasonic r5 220k ohms panasonic r6 91k ohms panasonic r7 910 ohms panasonic r8 51 ohms panasonic r9 100 ohms panasonic d1, d2 ll4148 d-35 digi-key gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
attenuators - smt 5 5 - 163 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 be generated with proper rf circuit design techniques. signal lines at the rf ports should be 50 ohm impedance and the package ground leads should be connected directly to the pcb rf ground plane, similar to that shown above. the evaluation circuit board shown above is available from hittite microwave corporation upon request. list of materials for evaluation pcb 101827 [1] item description j1 - j2 pcb mount sma rf connector j3 - j5 dc pin c1, c2 330pf capacitor, 0402 pkg. c3, c4 10kpf capacitor, 0603 pkg. u1 HMC473MS8 / HMC473MS8e pcb [2] 101825 eval board [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 gaas mmic voltage variable attenuator, 0.45 - 2.2 ghz HMC473MS8 / 473ms8e v01.1105
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