UNISONIC TECHNOLOGIES CO., LTD TF218 Preliminary JFET N-CHANNEL JUNCTION FIELD EFFECT TRANSISTOR DESCRIPTION The UTC TF218 is an N-channel junction field effect transistor, and it can be specially used in electronic condenser microphone specially. FEATURES * Good voltage characteristics and transient characteristics. * Halogen Free ORDERING INFORMATION Ordering Number Package TF218G-x-AC3-R TF218G-x-AN3-R SOT-113 SOT-523 Pin Assignment 1 2 3 S D G S D G Packing Tape Reel Tape Reel MARKING TF218-H4 TF218-H5 www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd 1 of 3 QW-R206-093.b TF218 Preliminary JFET ABSOLUTE MAXIMUM RATING (Ta=25°С, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Gate to Drain Voltage VGDO -20 V Gate Current IG 10 mA Drain Current ID 1 mA Power Dissipation PD 100 mW Junction Temperature TJ 150 °С Storage Temperature TSTG -55~+150 °С Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (Ta=25°С, unless otherwise specified) PARAMETER G-D Breakdown Voltage Gate Off Voltage Drain Current Forward Transfer Admittance Input Capacitance Reverse Transfer Capacitance Voltage Gain Reduced Voltage Characteristic Frequency Characteristic Input Resistance Output Resistance Total Harmonic Distortion Output Noise Voltage SYMBOL BVGDO VGS(OFF) IDSS |YFS| CISS CRSS GV △GVV △GVf ZIN ZO THD VNO TEST CONDITIONS IG=-100uA VDS=5.0V, ID=1uA VDS=5.0V, VGS=0 VDS=2.0V, VGS=0, f=1KHz VDS=5.0V, VGS=0, f=1MHz VDS=5.0V, VGS=0, f=1MHz VIN=10mV, f=1KHz VIN=10mV, f=1KHz VCC=4.5Æ1.5V f=1KHz~110Hz f=1KHz f=1KHz VIN=30mV, f=1KHz VIN=0, A Curve MIN -20 -0.2 140 0.65 25 TYP MAX UNIT V -0.6 -1.0 V 350 μA 1.0 ms 3.5 pF 0.65 pF -3.0 dB -1.2 -3.5 dB -1.0 dB MΩ 1000 Ω 1.2 % -110 dB CLASSIFICATION OF IDSS RANK RANGE H4 140-240 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw H5 210-350 2 of 3 QW-R206-093.b TF218 Preliminary JFET TEST CIRCUIT (Ta=25°С) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 3 QW-R206-093.b