UM9401 / um9402 / um9415 microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax : 978-937-3748 page 1 tm ? www. microsemi .com copyright ? 2007 rev: 2009-02-05 commercial two way radio antenna switch diodes rohs compliant versions available important: for the most current data, consult our website: www.microsemi.com absolute maximum ratings at 25o c (unless otherwise specified) condition UM9401 um9402 um9415 reverse voltage (v r ) @ i r = 10 ua 50v 50v 50v ? in. total length to 25 o c contact 5.5w 10w 25 o c (package flange temperature) 10w average power dissipation (p a ) free air 1.5w 2.5w operating temp. (t op ) -65 o c to +175 o c storage temp. (t stg ) -65 o c to +175 o c key features ? high transmitter power UM9401/um9402 => 100 w um9415 => 1000 w ? low harmonic distortion ? low third order distortion ? high carrier lifetime ? non cavity design ? thermally matched configuration ? low capacitance at 0 v bias ? low conductance at 0 v bias ? compatible with automatic insertion equipment ? rohs complaint versions available. 1 ? lead finish UM9401: pb/sn um9402: gold um9415: pb/sn umx9401,umx9415: matte tin 1 - the um9402 is rohs complaint. rohs compliant versions of the UM9401 and um9415 are supplied as umx9401, umx9415. consult factory for details. description microsemi offers a series of pin diodes specifically designed and characterized for solid state antenna sw itches in commercial two-way radios. antenna switches using the UM9401 and um9415 series pin diodes provide high isolation, low loss and low distortion characteristics formerly possible only with electromechanical relay type switches. the UM9401 and the um9402 diodes can handle 100 w of transmitter power, while the um9415 will handle over 1000 w. the extensive characterization of these pin diodes in antenna switch applications has resulted in guaranteed low distortion specifications under transmit and receive conditions. these diodes also feature low forward bias resistance and high zero bias impedance which are required for low loss, high isolation and wide bandwidth antenna switch performance. for rohs compliant devices, use the umx prefix. (ie: umx9415) the umx series meets rohs requir ements per eu directive 2002/95/ec. applications/benefits ? isolated stud package available ? surface mount package available ? maximum soldering temperature 260 o c for 30 seconds. UM9401 / um9402 um9415
UM9401 / um9402 / um9415 microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax : 978-937-3748 page 2 tm ? www. microsemi .com copyright ? 2007 rev: 2009-02-05 commercial two way radio antenna switch diodes rohs compliant versions available electrical parameters @ 25 ? c (unless otherwise specified) UM9401 / um9402 um9415 parameter symbol conditions min typ max min typ max units reverse current i r v r = 50 v 10 10 ua series resistance r s i f = 50 ma, f= 100 mhz 0.75 1.0 0.75 1.0 ? capacitance c t v r = 0 v, f = 100 mh z 1.1 1.5 2.8 4 pf parallel resistance r p v r = 0 v, f = 100 mhz 5 10 1 2 k? carrier lifetime t l i f = 10 ma 1.0 2.0 5.0 us forward voltage v f i f = 50 ma 1.0 1.0 v transmit harmonic distortion r 2a /a r 3a /a pin = 50 w f = 50 mhz, i f = 50 ma 80 80 -db receive third order distortion r 2ab /a pin = 10 w, 0 v bias f a = 50 mhz, f b = 51 mhz 60 60 -db e e l l e e c c t t r r i i c c a a l l s s
UM9401 / um9402 / um9415 microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax : 978-937-3748 page 3 tm ? www. microsemi .com copyright ? 2007 rev: 2009-02-05 commercial two way radio antenna switch diodes rohs compliant versions available rs vs if vf vs if -5 10 -4 10 -3 10 -2 10 -1 10 0 10 if (a) -1 10 0 10 1 10 2 10 3 10 rs (ohms) rs versus if typical UM9401/um9402 um9415 f = 100 mhz 0.0 0.2 0.4 0.6 0.8 1.0 1.2 vf (v) -5 10 -4 10 -3 10 -2 10 -1 10 0 10 if (a) vf versus if typical UM9401/um9402 um9415 ct vs frequency rp vs frequency 10 100 1000 f (mhz) 1 10 2 3 4 5 6 7 8 ct (pf) ct versus f typical UM9401/um9402 um9415 vr = 0 v vr = 0 v vr = 50 v vr = 50 v 1 10 2 10 3 10 4 10 f (mhz) 0 10 1 10 2 10 3 10 rp (kohms) rp versus f typical UM9401/um9402 vr = 0 v UM9401/um9402 vr = 50 v um9415 vr = 0 v um9415 vr = 50 v graphs
UM9401 / um9402 / um9415 microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax : 978-937-3748 page 4 tm ? www. microsemi .com copyright ? 2007 rev: 2009-02-05 commercial two way radio antenna switch diodes rohs compliant versions available um9415 power curve UM9401, 9402 power curve um9415 max power UM9401, 9402 max power 25 50 75 100 125 150 175 200 lead temperature ( c) 3000 10 100 1000 maximum transmitter power (w) maximum transmitter power um9415 if = 50 ma if = 100 ma if = 200 ma if = 500 ma if = 1 a zo = 50 ohms, l = 1/2", swr = infinite o 25 50 75 100 125 150 175 200 lead temperature ( c) 1 10 100 1000 maximum transmitter power (w) maximum transmitter power UM9401/um9402 if = 10 ma if = 20 ma if = 50 ma if = 100 ma if = 200 ma zo = 50 ohms, l = 1/2", swr = infinite o g g r r a a p p h h s s
UM9401 / um9402 / um9415 microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax : 978-937-3748 page 5 tm ? www. microsemi .com copyright ? 2007 rev: 2009-02-05 commercial two way radio antenna switch diodes rohs compliant versions available ?style? UM9401b ?style? um9415b ?style? UM9401sm ?style? um9415sm mechanical
UM9401 / um9402 / um9415 microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax : 978-937-3748 page 6 tm ? www. microsemi .com copyright ? 2007 rev: 2009-02-05 commercial two way radio antenna switch diodes rohs compliant versions available ?style? um9402 UM9401sm footprint um9415sm footprint mechanical
UM9401 / um9402 / um9415 microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax : 978-937-3748 page 7 tm ? www. microsemi .com copyright ? 2007 rev: 2009-02-05 commercial two way radio antenna switch diodes rohs compliant versions available maximum transmitter power the maximum cw transmitter power, p t(max) , a pin diode antenna switch can handle depends on the diode resistance, r s , power dissipation, p d , antennae swr, , and the nominal impedance, z o . the expression is as follows: 2 )( 2 1 ? ? ? ? ? ? ? ? ? ? d od maxt r xzp p [watts] characteristic curves are shown in the data section which gives both the maximum and typical diode resistance, r s as a function of forward current. the maximum power dissipation rating of the pin diode depends both on the length of the diode leads and the temperature of the contacts to which the leads are connected. a graph defining the maximum power dissipation at various combinations of overall lead length (l) and lead temperature (t l ) is given in the data section. from these curves and the above equation, the power handling capability of the pin diode may be computed for a specific application. curves are also presented which show the maximum transmitter power that an antenna switch using UM9401s and um9415s can safely handle for various forward currents and lead temperatures. these curves are based on a typical design condition of a ? in. total overall lead length, 50 ? line impedance, and a totally mismatched antenna ( = ). for the case of a perfectly matched antenna, the maximum transmitter power can be increased by a factor of 4. design information a circuit configuration for a two-way radio antenna switch using pin diodes consists of a diode placed in series with the transmitter and a shunt diode placed a quarter wavelength from the antenna in the direction of the receiver as shown. for low frequency operation, the quarter wave line may be simulated by lumped elements. typical performance of antenna switches using pin diodes forward biased at 100 ma is less than 0.2 db insertion loss and 30 db isolation during transmit; at zero bias the receive insertion loss is less than 0.3 db. this performanc e is achievable across a 20 % bandwidth at center frequencies ranging from 10 to 500 mhz. antenna antenna dc supply d1 d2 l d1 d2 dc supply /4 transmitter transmitter receiver receiver l = z o / 2 ? f o (h) c = 1/2 ? f o z o (f) l cc design
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