-Conaucto't \Pioaact i, One. dVs.s.iv TELEPHONE: (973) 376-2922 (212) 227-6005 20 STERN AVE. SPRINGFIELD, NEW JERSEY 07081 U.S.A. LSK389 ULTRA LOW NOISE MONOLITHIC DUAL N-CHANNEL JFET FEATURES ULTRA LOW NOISE en = 0.9nV/VHz (typ) TIGHT MATCHING IVGsi-2l = 20rnV max HIGH BREAKDOWN VOLTAGE BVGss = 40V max HIGH GAIN G(s = 20mS (typ) LOW CAPACITANCE Top View TO-71 25pF typ IMPROVED SECOND SOURCE REPLACEMENT FOR 2SK389 ABSOLUTE MAXIMUM RATINGS1 SOIC-A S2 T|G2 @ 25 °C (unless otherwise stated) 7]ss Maximum Temperatures Storage Temperature -65to+150°C Junction Operating Temperature -55to+135°C D2o6 ] D2 T] S2 Maximum Power Dissipation G2 Continuous Power Dissipation @ +25°C 400mW Maximum Currents Gate Forward Current lc(F) = 10mA Maximum Voltages Gate to Source VGSS = 40V Gate to Drain VGDS = 40V For equivalent single version, see LSK170 family. MATCHING CHARACTERISTICS @ 25°C (unless otherwise stated) SYMBOL CHARACTERISTIC VGSI — VGS^ Differential Gate to Source Cutoff Voltage IDSSI MIN Gate to Source Saturation Current Ratio TYP MAX UNITS 20 mV VDS = 10V, l D =1mA — VDS = 1 0V, VGS = 0V 0.9 CONDITIONS IDSS2 ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise stated) SYMBOL BVcss VGS(OFF) CHARACTERISTIC MIN Gate to Source Breakdown Voltage -40 Gate to Source Pinch-off Voltage LSK389A loss Drain to Source Saturation Current TYP MAX -0.15 -2 2.6 6.5 LSK389B 6 12 LSK389C 10 20 LSK389D 17 30 UNITS CONDITIONS V VDs = 0, ! D =-100uA V VDs = 10V, ! D =0.1uA mA IGSS Gate to Source Leakage Current -200 pA VGS = -30V, VDS = 0 IG1G2 Gate to Gate Isolation Current ±1.0 uA VG1-G2 = ±45V, I D =I S = OA _ Note: All MIN/TYP/MAX limits are absolute numbers. Negative signs indicate electrical polarity only. Quality Semi-Conductors ELECTRICAL CHARACTERISTICS CONT. @ 25°C (unless otherwise stated) SYMBOL CHARACTERISTIC MIN TYP 8 20 UNITS MAX CONDITIONS G,s Full Conduction Transconductance en Noise Voltage 0.9 1.9 Nv/VHz en Noise Voltage 2.5 4 Nv/VHz Ciss Common Source Input Capacitance 25 pF V D S = 10V, ID = 2mA, f= 1kHz, NEW =1 Hz V D s= 10V, ID = 2mA, f= 10Hz, NBW= 1Hz Vos=10V, VGS = 0, f=1MHz, CRSS Common Source Reverse Transfer Cap. 5.5 pF VDG = 10V, ID = 0, f=1MHz, mS VDS = 10V, VGS = 0, f = 1 kHz ORDERING INFORMATION LSK389 - A - SOIC-8 /' \e loss Range A B C D 2. 6 -6.5mA 6 - 12 mA 10 - 2 0 m A 17 - 3 0 m A TO-71 SOIC-8 TO-71 6L SOIC-A 8L PACKAGE DIMENSIONS TO-71 SOIC-A Six Lead 0.195 0.175 . ' k— D,A u Q 230 0.209 0.014 °<"s 1 t 0.030 MAX. . 0.210 0.170 •r I CQ21 -L, *l 1 IUU i n n °- i °° 6 LEADS- 1: i! » 0.019 DIA. I 0.016 I 5 rnr LU- o ID ^ITI— '0,189' -LLJ Llk __ IFI3 in-,° i m I -rn I ^ a.150 It M|N 100 1 r •"" 0.0040 |*»-0.050 L_ Jf H^X >\8 IpO*. L ' XST 0.046 *' v«OxJ6,y Z^s/ I 'V r, 196 L_ 0.100- 1 \ ' J- 0,050 •* 0048 0.036 0.028 All dimensions in inches. O.OQ75 " 0,2440 ! 1 0.2284 ^ DIMENSIONS IN INCHES