rf mosfet power transistor, 8ow, 28v 2 - 175 mhz DU2880U features n-channel enhancement mode device dmos structure lower capacitances for broadband operation high saturated output power lower noise figure than competitive devices absolute maximum ratings at 25c 1u speciftcations subject to change without notice. m/a-com, inc. north america: tel. (800) 366-2266 n asia/pacific: tel. +81 (03) 3226-1671 fax (800) 618-8883 fax +81 (03) 3226-1451 w europe: tel. +44 (1344) 869 595 fax +44 (1344) 300 020
rf mosfet power transistor, 8ow, 28v DU2880U typical broadband performance curves efficiency vs frequency i?,,=28 v i,,=400 ma p,,,=80 w 25 50 100 150 175 frequency (mhz) power output vs power input 120 ) v,,=28 v ldq=400 ma i 30 mhz loo 5 175 mhz 2 80 100 mhz k z 80 5 40 20 f 0: 0.1 0.2 0.3 1 2 3 4 5 power input(w) v2.00 gain vs frequency 25 .? 25 50 100 150 175 frequency (mhz) power output vs supply voltage i,,=400 ma f-175 mhz p,,=3.0 w 120 . loo - f 80. 01 13 75 20 25 30 33 supply voltage(v) typical device impedance frequency (mhz) 30 z,, (ohms) 2 load (ohms) 5.4 - i 4.4 5.7 + j 4.7 1 50 1 2.5 - j 4.4 1 3.4 + j 3.5 i i ~~ 100 1 1.6-j3.4 1 2.4 + j 2.4 i 175 0.7 - j 1.2 1.7+jo.8 v,,=28 v, i,,=400 ma, p,,,=80 watts z,, is the series equivalent input impedance of the device from gate to source. z load is the optimum series equivalent load impedance as measured from drain to ground. specifications subject to change without notice. mia-com, inc. north america: tel. (800) 366-2266 fax (800) 618-8883 s asia/pacific: tel. +81 (03) 3226-1671 fax +81 (03) 3226-1451 = europe: tel. +44 (1344) 869 595 fax +44 (1344) 300 020
rf mosfet power transistor, 8ow, 28v DU2880U v2.00 rf test fixture vds = 28 volts idq = 400ma rf in jl cl vgs j3 -l--l - - cl $3 c2,c9,clo c4,cll cs c6,cb c7 cl2 ll l2 l3,l4 rl fl2 01 board vds j4 l3 rf out ql i2 c8 j2 i . . i a c9 c7 -/- -j parts list trimmer capacitor 4-4opf capacitor 5opf capacitor 1 ooopf monolithic circuit capacitor o.oluf trimmer capacitor 9-18opf capacitor 15pf electrolytic capacitor 5ouf 50 volt no. 12 awg copper wire x 1 .18? (loop 0.5?) no. 12 awg copper wire x 1? (loop 0.4?) 8 turns of no. 18 awg enamel wire on ?0.25?, close wound resistor 300 ohms 0.5 walt resistor 2.7k ohms 0.25 wa-it DU2880U fr4 0.062 specifications subject to change without notice. m/a-com, inc. north america: tel. (800) 366-2266 n asia/pacific: tel. +81 (03) 3226-1671 n europe: tel. +44 (1344) 869 595 fax (800) 618-8883 fax +8l (03) 3226-1451 fax +44 (1344) 300 020
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