unisonic technologies co., ltd tf212 preliminary jfet www.unisonic.com.tw 1 of 3 copyright ? 2009 unisonic technologies co., ltd qw-r206-097.b capacitor microphone applications ? description the utc tf212 uses advanced trench technology to provide excellent r ds (on) , low gate charge and operation with low gate voltages. this device is suitable for use in capacitor microphone applications. ? features * suited for use in audio, telephone capacitor microphones. * good voltage characteristic. * good transient characteristic. * halogen free ? ordering information pin assignment ordering number package 1 2 3 packing tf212g-xx-ac3-r sot-113 s d g tape reel TF212G-XX-A3C-R sot-113s s d g tape reel tf212g-xx-an3-r sot-523 s d g tape reel ? marking tf212-f4 tf212-f5
tf212 preliminary jfet unisonic technologies co., ltd 2 of 3 www.unisonic.com.tw qw-r206-097.b ? absolute maximum ratings ( ta=25 , unless otherwise specified ) parameter symbol rating unit gate drain voltage v gdo -20 v gate current i g 10 ma drain current i d 1 ma power dissipation p d 100 mw junction temperature t j 150 storage temperature t stg -55~+150 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 oper ation is not implied. ? electrical characteristics (ta=25 , unless otherwise specified) parameter symbol test conditions min typ max unit gate drain breakdown voltage bv gdo i g =-100 a -20 v gate source cut off voltage v gs(off) v ds =5v, i d =1 a -0.2 -0.6 -1.2 v drain current i dss v ds =5v, v gs =0 140 350 a forward transfer admittance lyfsl v ds =2v, v gs =0, f=1khz 1 1.2 ms input capacitance c iss v ds =5v, v gs =0, f=1mhz 3.5 pf output capacitance c rss v ds =5v, v gs =0, f=1mhz 0.65 pf voltage gain g v v in =10mv, f=1khz -3 db reduced voltage characteristic g vv v in =10mv,f=1khz, v cc =4.5v 1.5v -1.2 -3.5 db frequency characteristic g vf f=1khz to 110hz -1 db input resistance z in f=1khz 25 m ? output resistance z o f=1khz 700 ? total harmonic distortion thd v in =30mv, f=1khz 1 % output noise voltage v no v in =0 -110 db ? classification of i dss rank f4 f5 range 140-240 210-350
tf212 preliminary jfet unisonic technologies co., ltd 3 of 3 www.unisonic.com.tw qw-r206-097.b ? test circuit (ta=25c) thd v 1k ? 33 f v tvm 1k ? for output impedance v cc =4.5v v cc =1.5v 15pf osc a b + utc assumes no responsib ility for equipment failures that result from using pr oducts 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.
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