DMD1028 DMD1028-a document number 6509 issue 3 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab.co.uk website: http://www.semelab.co.uk semelab plc reserves the right to change test conditions, parameter limits and package dimensions without notice. information furnished by semelab is believed to be both accurate and reliable at the time of going to press. however semelab assumes no responsibility for any errors or omissions discovered in its use. semelab encourages customers to verify that datasheets are current before placing orders. p d power dissipation bv dss drain ? source breakdown voltage * bv gss gate ? source breakdown voltage* i d(sat) drain current* t stg storage temperature t j maximum operating junction temperature 875w (438w -a version) 70v 20v 30a ?65 to 150c 200c mechanical data m k j i o n a c ( 2p l s ) d f e ( 4p l s ) b g ( t y p ) p ( 2p l s ) 1 54 3 2 h gold metallised multi-purpose silicon dmos rf fet 300w ? 28v ? 175mhz push?pull applications ? vhf/uhf communications from 1 mhz to 400 mhz metal gate rf silicon fet tetrafet * per side d1 pin 1 source (common) pin 2 drain 1 pin 3 drain 2 pin 4 gate 2 pin 5 gate 1 features ? suitable for broad band applications ? simple bias circuits ? ultra-low thermal resistance ? beo free ? low crss ? high gain ? 16 db minimum dim millimetres tol. inches tol. a 15.24 0.50 0.600 0.020 b 10.80 0.13 0.425 0.005 c 45 5 45 5 d 9.78 0.13 0.385 0.005 e 8.38 0.13 0.330 0.005 f 27.94 0.13 1.100 0.005 g 1.52r 0.13 0.060r 0.005 h 10.16 0.15 0.400 0.006 i 21.84 0.23 0.860 0.009 j 0.10 0.02 0.004 0.001 k 1.96 0.13 0.077 0.005 m 1.02 0.13 0.040 0.005 n 4.45 0.38 0.175 0.015 o 34.04 0.13 1.340 0.005 p 1.63r 0.13 0.064r 0.005 rohs compliant
DMD1028 DMD1028-a document number 6509 issue 3 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab.co.uk website: http://www.semelab.co.uk semelab plc reserves the right to change test conditions, parameter limits and package dimensions without notice. information furnished by semelab is believed to be both accurate and reliable at the time of going to press. however semelab assumes no responsibility for any errors or omissions discovered in its use. semelab encourages customers to verify that datasheets are current before placing orders. parameter test conditions min. typ. max. unit 70 6 1 17 4.8 0.1 16 60 20:1 360 180 15 v gs = 0 i d = 100ma v ds = 28v v gs = 0 v gs = 20v v ds = 0 i d = 10ma v ds = v gs v ds = 10v i d = 6a i d = 10ma v ds = v gs p o = 300w v ds = 28v i dq = 2a f = 175mhz v ds = 28v v gs = ?5v f = 1mhz v ds = 28v v gs = 0 f = 1mhz v ds = 28v v gs = 0 f = 1mhz v ma a v mhos v db % ? pf pf pf electrical characteristics (t case = 25c unless otherwise stated) drain?source breakdown voltage zero gate voltage drain current gate leakage current gate threshold voltage* forward transconductance* gate threshold voltage matching between sides common source power gain drain efficiency load mismatch tolerance input capacitance output capacitance reverse transfer capacitance r thj?case thermal resistance junction ? case max. 0.2c / w 0.4 c / w -a version thermal data * pulse test: pulse duration = 300 s , duty cycle 2% total device per side per side bv dss i dss i gss v gs(th) g fs v gs(th)match g ps vswr c iss c oss c rss
DMD1028 DMD1028-a document number 6509 issue 3 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab.co.uk website: http://www.semelab.co.uk semelab plc reserves the right to change test conditions, parameter limits and package dimensions without notice. information furnished by semelab is believed to be both accurate and reliable at the time of going to press. however semelab assumes no responsibility for any errors or omissions discovered in its use. semelab encourages customers to verify that datasheets are current before placing orders. 0 50 100 150 200 250 300 350 p out w 0 5 10 15 20 25 gain db gain (db) vds = 28v idq = 2a f =175mhz 0 50 100 150 200 250 300 350 p out w 0 10 20 30 40 50 60 70 80 90 efficiency % efficiency (%) vds = 28v idq = 2a f =175mhz figure 1 ? gain vs. power output. figure 2 ? efficiency vs. power output. 0 50 100 150 200 250 300 350 p out w pep -60 -50 -40 -30 -20 -10 imd3 dbc imd3 (dbc) f 1 = 175 mhz f 2 = 175.1 mhz v ds = 28v i dq = 2a figure 3 ? imd vs. power output
DMD1028 DMD1028-a document number 6509 issue 3 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab.co.uk website: http://www.semelab.co.uk semelab plc reserves the right to change test conditions, parameter limits and package dimensions without notice. information furnished by semelab is believed to be both accurate and reliable at the time of going to press. however semelab assumes no responsibility for any errors or omissions discovered in its use. semelab encourages customers to verify that datasheets are current before placing orders. 0 5 10 15 20 25 30 35 40 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 v ds (v) i ds (a) v g =13 v v g =12 v v g =11 v v g =10 v v g =9v v g =8 v v g =7 v v g =6 v v g =5 v 1 10 100 1000 0 5 10 15 20 25 30 v ds v capacitance pf output capacitance input capacitance reverse transfer capacitance figure 4 ? typical iv characteristics. figure 5 ? typical cv characteristics.
DMD1028 DMD1028-a document number 6509 issue 3 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab.co.uk website: http://www.semelab.co.uk semelab plc reserves the right to change test conditions, parameter limits and package dimensions without notice. information furnished by semelab is believed to be both accurate and reliable at the time of going to press. however semelab assumes no responsibility for any errors or omissions discovered in its use. semelab encourages customers to verify that datasheets are current before placing orders. t2 t3 DMD1028 DMD1028 t4 t6 t5 t1 1u 1u 2-18 pf 47pf 680pf 680pf 2-18 pf 12 1n l2 l1 10k 1n 100k gate-bias 28v 100n 1n 1000u 100n 90 pf DMD1028 175mhz test fixture substrate 1.6mm ptfe/glass, er=2.5 all microstrip lines w=4.4mm t1,2,3 7cm storm products exe18 19/30 s1tw coaxial cable on siemens b62152a1x1 2-hole core. t4,5 14cm storm products exe18 19/30 s1tw coaxial cable. t6 11cm storm products exe18 19/30 s1tw coaxial cable l1 6 turns 1.2mm dia wire, 5mm internal diameter l2 1.5 turns 0.9mm dia wire on siemens a1 x 1 2 hole core
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