3SK229 GaAs Dual Gate MES FET UHF TV Tuner RF Amplifier Table 1 Absolute Maximum Ratings (Ta = 25°C) Item Symbol Rating Unit ——————————————————————– Drain to source voltage VDS 12 V ——————————————————————– Gate 1 to source voltage VG1S –6 V ——————————————————————– Gate 2 to source voltage VG2S –6 V ——————————————————————– Drain current ID 50 mA ——————————————————————– Channel power dissipation Pch 150 mW ——————————————————————– Channel temperature Tch 125 °C ——————————————————————– Storage temperature Tstg –55 to +125 °C ——————————————————————– MPAK-4 2 3 1 4 1. 2. 3. 4. Source Gate 1 Gate 2 Drain Table 2 Electrical Characteristics (Ta = 25°C) Item Symbol Min Typ Max Unit Test condition ———————————————————————————————————————————————– Drain to source cutoff current IDSX — — 50 µA VDS = 12 V, VG1S = –4 V, VG2S = 0 ———————————————————————————————————————————————– Gate 1 to source breakdown voltage V(BR)G1SS –6 — — V IG1 = –10 µA, VG2S = VDS = 0 ———————————————————————————————————————————————– Gate 2 to source breakdown voltage V(BR)G2SS –6 — — V IG2 = –10 µA, VG1S = VDS = 0 ———————————————————————————————————————————————– Gate 1 cutoff current IG1SS — — –5 µA VG1S = –5 V, VG2S = VDS = 0 ———————————————————————————————————————————————– Gate 2 cutoff current IG2SS — — –5 µA VG2S = –5 V, VG1S = VDS = 0 ———————————————————————————————————————————————– Drain current IDSS 15 25 40 mA VDS = 5 V, VG1S = VG2S = 0 ———————————————————————————————————————————————– Gate 1 to source cutoff voltage VG1S(off) — –1.3 –3.5 V VDS = 5 V, VG2S = 0, ID = 100 µA ———————————————————————————————————————————————– Gate 2 to source cutoff voltage VG2S(off) — –1.3 –3.5 V VDS = 5 V, VG1S = 0, ID = 100 µA ———————————————————————————————————————————————– 3SK229 3SK229 Table 2 Electrical Characteristics (Ta = 25°C) (cont) Item Symbol Min Typ Max Unit Test condition ———————————————————————————————————————————————– Forward transfer admittance |yfs| 20 34 — mS VDS = 5 V, VG2S = 1 V, ID = 10 mA, f = 1 kHz ———————————————————————————————————————————————– Input capacitance Ciss — 0.56 1.0 pF VDS = 5 V, ———————————————————————————————————– VG1S = VG2S = –4 V, Output capacitance Coss — 0.36 0.6 pF f = 1 MHz ———————————————————————————————————– Reverse transfer capacitance Crss — 0.027 0.05 pF ———————————————————————————————————————————————– Power gain PG 17 20 — dB VDS = 5 V, VG2S = 1 V, ———————————————————————————————————– ID = 10 mA, f = 900 MHz Noise figure NF — 1.3 2.0 dB ———————————————————————————————————————————————– • Marking is “XS-”. • See characteristic curve of 3SK228. 2