2N3685 - National Semiconductor

2N3685 N-Channel JFETs

The 2N3684/PN3684 thru 2N3687/PN3687 series of N-channei JFETs is characterized for general purpose small signal amplifier applications requiring low noise and tightly specified IpsS ranges. Absolute Maximum Ratings (25°o Gate-Drain or Gate-Source Voltage (Nottee 2) Gate Current or Drain Current -50V 50 mA Total Device Dissipation (Derate 2 mW/°C to 175.

Features

ion Drain Current Drain-Source ON Resistance VDS=20V,I D = 1 nA V DS =20V, V GS =0 V D s = 0V, Vqs = 0- (Note 1) Common-Source Forward Transconductance, (Note 3i Common-Source Output Conductance Common-Source Reverse Transfer Capacitance V DS =20V, V G S = Common-Source Input Capacitance Equivalent Short-Circuit Input Spot Noise Voltage Noise Figure v D s= iov, v G s = o V DS - 10V, V G S = 0- R gen = 10M - BW - 6 Hz Note 1 Note 2 Note 3 Not JEDEC registered data. Due to symmetrical geometry, these units may be operated with source and drain leads interchangi Pulse test duratio.