LSK170 ULTRA LOW NOISE SINGLE N-CHANNEL JFET Linear Integrated Systems FEATURES ULTRA LOW NOISE (f = 1kHz) en = 0.9nV/√Hz HIGH BREAKDOWN VOLTAGE BVGSS = 40V max HIGH GAIN Yfs = 22mS (typ) HIGH INPUT IMPEDANCE IG = -500pA max LOW CAPACITANCE IMPROVED SECOND SOURCE REPLACEMENT FOR 2SK170 ABSOLUTE MAXIMUM RATINGS1 @ 25 °C (unless otherwise stated) D G S Maximum Temperatures 1 2 3 Storage Temperature -65 to +150 °C Operating Junction Temperature -55 to +135 °C SOT-23 TOP VIEW TO-92 BOTTOM VIEW 22pF max D 1 S 2 3 G Maximum Power Dissipation 400mW Continuous Power Dissipation @ +125 °C Maximum Currents Gate Forward Current IG(F) = 10mA *For equivalent monolithic dual, see LSK389 family. Maximum Voltages Gate to Source VGSS = 40V Gate to Drain VGDS = 40V ELECTRICAL CHARACTERISTICS @ 25 °C (unless otherwise stated) SYMBOL BVGSS CHARACTERISTIC MIN Gate to Source Breakdown Voltage 40 VGS(OFF) Gate to Source Pinch-off Voltage 0.2 VGS Gate to Source Operating Voltage Drain to Source Saturation Current IDSS IG LSK170A TYP MAX UNITS 2 0.5 2.6 CONDITIONS V VDS = 0, ID = 100µA V VDS = 10V, ID = 1nA V VDS = 10V, ID = 1mA mA VDG = 10V, VGS = 0 nA VDG = 10V, ID = 1mA 6.5 LSK170B 6 12 LSK170C 10 20 Gate Operating Current 0.5 IGSS Gate to Source Leakage Current nA VDG = 10V, VDS = 0 Yfss Full Conduction Transconductance 22 mS VGD = 10V, VGS = 0, f = 1kHz Yfs Typical Conduction Transconductance 10 mS VDG = 15V, ID = 1mA en Noise Voltage 0.9 1.9 nV/√Hz VDS = 10V, ID = 2mA, f = 1kHz, NBW = 1Hz en Noise Voltage 2.5 4 nV/√Hz VDS = 10V, ID = 2mA, f = 10Hz, NBW = 1Hz CISS Common Source Input Capacitance 20 pF CRSS Common Source Reverse Transfer Cap. 5 pF 1. 1 VDS = 15V, ID = 500µA Absolute maximum ratings are limiting values above which serviceability may be impaired. Information furnished by Linear Integrated Systems is believed to be accurate and reliable. However, no responsibility is assumed for its use; nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Linear Integrated Systems. Linear Integrated Systems • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490-9160 • Fax: 510 353-0261