BF961 n-channel dual gate mos-fieldeffect tetrode, depletion mode applications input- and mixer stages especially for fm- and vhp tv-tuners up to 300 mhz. features ? integrated gate protection diodes ? high cross modulation performance ? low noise figure ? high agc-range ? low feedback capacitance ? low input capacitance ^ BF961 marking: BF961 plastic case (to 50) 1-drain, 2=source, 3=gate 1, 4=gate 2 absolute maximum ratings tamb = 25c, unless otherwise specified -od -os parameter drain - source voltage drain current gate 1/gate 2 - source peak current total power dissipation channel temperature storage temperature range test conditions tamb<60'c type ? ~~ ?? symbol vds id |q1/g2sm ptot tcm tstg value 20 30 10 200 150 -55 to +150 unit v ma ma mw c c maximum thermal resistance tamb = 25c, unless otherwise specified parameter channel ambient test conditions on glass fibre printed board (40 x 25 x 1.5) mm3 plated with 35u.m cu symbol rthcha value- 450 unit; k/w nj semi-conductors reserves the right to change test conditions, parameters limits and package dimensions without notice information famished by nj semi-conductors is believed to be both accurate and reliable at the time or*going to press. however nj semi-conductors assumes no responsibility for any errors or omissions discovered in its use. nj semi-conductors encourages customers to verify that datasheets are current before placing orders. quality semi-conductors
electrical dc characteristics tamb = 25c, unless otherwise specified parameter drain - source breakdown voltage gate 1 - source breakdown voltage gate 2 - source breakdown voltage gate 1 - source leakage current gate 2 - source leakage current drain current gate 1 - source cut-off voltage gate 2 - source cut-off voltage test conditions ld=10jja,-vg1s=-vg2s = 4v +igis = 10 "a vg2s = vds = 0 +ig2s = 10 ma, vgis = vds = 0 vgis = 5 v, vg2s = vds = 0 vg2s = 5v, vgis = vds = 0 vds = 15v, vgis = 0, vg2s = 4v vds = 15v, vg2s = 4v, !d = 20|ia BF961 BF961a BF961b symbol v(br)ds v(br)g1ss v(br)g2ss i'giss ig2ss toss toss toss -vgis(off) -vg2s(off) min 20 8 8 4 4 9.5 typ max 14 14 100 100 20 10.5 20 3.5 3.5 unit v v v na na ma ma ma v v electrical ac characteristics vds - 15 v, id = 10 ma, vg2s = 4 v, f = 1 mhz , tamb = 25c, unless otherwise specified parameter j forward transadmittance gate 1 input capacitance gate 2 input capacitance feedback capacitance output capacitance power gain agc range noise figure test conditions > vgis = 0, vg2s = 4 v gs = 2 ms, gl = 0.5 ms, f = 200 mhz vg2s = 4 to -2 v, f = 200 mhz gs = 2 ms, gl = 0.5 ms, f = 200 mhz symbol; 1x21,1 qssgl cisso2 crss goss cos agps f mint 12 typ 15 3.7 1.6 25 1.6 20 50 1.8 max 2.5 unit ms pf pf ff pf db db db -0,35
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