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october 2011 doc id 17122 rev 3 1/16 16 STAC2942F hf/vhf/uhf rf power n-channel mosfets features gold metallization excellent thermal stability common source push-pull configuration p out = 350 w min. with 21 db gain @ 175 mhz in compliance with the 2002/95/ec european directive description the STAC2942F is a gold metallized n-channel mos field-effect rf power transistor. it is intended for use in 50 v dc large signal applications up to 250 mhz. figure 1. pin connection stac244f air cavity 1. drain 2. gate 3. source (bottom side) 1 1 2 2 3 table 1. device summary order code marking package packaging STAC2942Fw STAC2942F (1) stac244f plastic tray 1. for more details please refer to chapter 7: marking, packing and shipping specifications . www.st.com
contents STAC2942F 2/16 doc id 17122 rev 3 contents 1 electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 static . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 dynamic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 marking, packing an d shipping specifications . . . . . . . . . . . . . . . . . . . 14 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 STAC2942F electrical data doc id 17122 rev 3 3/16 1 electrical data 1.1 maximum ratings 1.2 thermal data table 2. absolute maximum ratings (t case = 25 c) symbol parameter value unit v (br)dss (1) 1. t j = 150 c drain source voltage 130 v v dgr (1) drain-gate voltage (r gs = 1 m ? )130v v gs gate-source voltage 20 v i d drain current 40 a p diss power dissipation 625 w t j max. operating junction temperature 200 c t stg storage temperature -65 to +150 c table 3. thermal data symbol parameter value unit r thjc junction - case thermal resistance 0.28 c/w electrical characteristics STAC2942F 4/16 doc id 17122 rev 3 2 electrical characteristics (t case = 25 o c) 2.1 static 2.2 dynamic table 4. static (per side) symbol test conditions min. typ. max. unit v (br)dss (1) 1. t j = 150 c v gs = 0 v i ds = 100 ma 130 v i dss v gs = 0 v v ds = 50 v 100 a i gss v gs = 20 v v ds = 0 v 250 na v gs(q) v ds = 10 v i d = 250 ma 1.5 2.5 4.0 v v ds(on) v gs = 10 v i d = 10 a 3.0 v g fs v ds = 10 v i d = 5 a 5 s c iss v gs = 0 v v ds = 50 v f = 1 mhz 425 pf c oss 202 pf c rss 12 pf table 5. dynamic symbol test conditions min. typ. max. unit p out v dd = 50 v, i dq = 2 x 250 ma, p in = 4 w, f = 175 mhz 350 450 w h d v dd = 50 v, i dq = 2 x 250 ma, p in = 4 w, f = 175 mhz 60 75 % STAC2942F impedance doc id 17122 rev 3 5/16 3 impedance figure 2. current conventions note: measured gate to gate and drain to drain, respectively. table 6. impedance data freq. (mhz) z in ( ? )z dl ( ? ) 175 mhz 2.0 - j2.0 3.5 + j5.2 typical performance STAC2942F 6/16 doc id 17122 rev 3 4 typical performance figure 3. capacitances vs drain supply voltage figure 4. output power vs drain supply voltage figure 5. output power vs gate voltage figure 6. output power vs input power 0 100 200 3 00 400 500 600 700 8 00 900 1000 01020 3 0405060 c a p a cit a nce s (pf) su pply volt a ge (v) ci ss cr ss co ss a m 00556 am00556v1 freq. = 1 mhz 2 x w s x w s r z h u : 6 x s s o \ y r o w d j h 9 3 l q : 3 l q : 3 l q : $ 0 y ) u h t 0 + ] , g t [ p $ / u t p u t p o w e r 7 ' a t e v o l t a g e 6 4 c a s e ? # 4 c a s e ? # 4 c a s e ? # & |