TF208TH no.7698-1/4 features ? ultrasmall package facilitates miniaturization in end products. ? especially suited for use in electret condenser microphone for audio equipments and telephones. ? excellent voltage characteristics. ? excellent transient characteristics. ? adoption of fbet process. specifications absolute maximum ratings at ta=25 c parameter symbol conditions ratings unit gate-to-drain voltage v gdo --20 v gate current i g 10 ma drain current i d 1ma allowable power dissipation p d 100 mw junction temperature tj 150 c storage temperature tstg --55 to +150 c electrical characteristics at ta=25 c (value per element) ratings parameter symbol conditions min typ max unit gate-to-drain breakdown voltage v (br)gdo i g =--100 m a --20 v cutoff voltage v gs(off) v ds =2v, i d =1 m a --0.1 --1.0 v zero-gate voltage drain current i dss v ds =2v, v gs =0 140* 350* m a forward transfer admittance ? yfs ? v ds =2v, v gs =0, f=1khz 0.5 1.4 ms input capacitance ciss v ds =2v, v gs =0, f=1mhz 5.0 pf reverse transfer capacitance crss v ds =2v, v gs =0, f=1mhz 1.1 pf [ta=25?c, v cc =2.0v, r l =2.2k w , cin=5pf, see specified test circuit.] voltage gain g v v in =10mv, f=1khz --2.0 db reduced voltage characteristic d g vv v in =10mv, f=1khz, v cc =2.0 ? 1.5v --0.6 --2.0 db frequency characteristic d g vf f=1khz to 110hz --1.0 db total harmonic distortion thd v in =30mv, f=1khz 0.7 % output noise voltage v no v in =0, a curve --102 db sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan ordering number : enn7698 33004 ts im ta-100955 any and all sanyo products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo representative nearest you before using any sanyo products described or contained herein in such applications. sanyo 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 sanyo products described or contained herein. TF208TH n-channel silicon junction fet electret condenser microphone applications
TF208TH no.7698-2/4 * : the TF208TH is classified by i dss as follows : (unit : m a) rank b4 b5 i dss 140 to 240 210 to 350 package dimensions test circuit unit : mm 2228 osc 5pf + 33 f 2.2k v cc =2v v cc =1.5v v a b vtvm thd voltage gain frequency characteristic distortion reduced voltage characteristic output impedance 500 400 300 200 100 0 it04745 --1.0 --0.8 --0.6 --0.4 --0.2 0 i dss =350 a 250 a 150 a 012345 400 300 200 100 0 it04743 --0.2v v ds =2v 25 c v gs =0 --0.1v --0.3v --0.4v 0 0.5 1.0 1.5 2.0 400 300 200 100 0 it04744 --0.2v v gs =0 --0.1v --0.3v 500 400 300 200 100 0 it04746 --1.0 --0.8 --0.6 --0.4 --0.2 0 v ds =2v ta=75 c --25 c --0.4v i d -- v ds drain-to-source voltage, v ds -- v drain current, i d -- a i d -- v ds drain-to-source voltage, v ds -- v drain current, i d -- a i d -- v gs gate-to-source voltage, v gs -- v drain current, i d -- a i d -- v gs gate-to-source voltage, v gs -- v drain current, i d -- a 1 : drain 2 : source 3 : gate sanyo : vtfp top view bottom view 0.45 1.4 0.8 1.2 0.2 0.2 0.34 0.07 0.07 1 2 3 0.25 0.2 0.1
TF208TH no.7698-3/4 0 100 200 300 400 500 --1.4 --1.2 --1.0 --0.8 --0.6 --0.2 --0.4 0 ? g vv -- i dss reduced voltage characteristic, ? g vv -- db it04752 0 0.2 0.4 0.6 0.8 1.0 1.2 thd -- i dss total harmonic distortion, thd -- % it04753 v gs (off) -- i dss cutoff voltage, v gs (off) -- v it04747 ? g vv :v cc =2v ? 1.5v v in =10mv f=1khz i dss : v ds =2v thd :v cc =2v v in =30v f=1khz i dss : v ds =2v 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 100 200 300 400 500 v ds =2v i d =1 a 0.6 0.8 1.0 1.4 1.2 2.0 1.8 1.6 0 100 200 300 400 500 it04748 v ds =2v v gs =0 f=1khz 10 7 5 3 2 2 1.0 1.0 10 23 57 0.1 23 57 ciss -- v ds drain-to-source voltage, v ds -- v drain-to-source voltage, v ds -- v input capacitance, ciss -- pf it04749 1.0 7 5 3 5 3 2 crss -- v ds reverse transfer capacitance, crss -- pf it04750 g v -- i dss voltage gain, g v -- db it04751 --4.5 --4.0 --3.5 --2.5 --3.0 --2.0 --1.5 --0.5 --1.0 0 100 200 300 400 500 0 100 200 300 400 500 g v : v cc =2v v in =10mv f=1khz r l =2.2k cin=5pf i dss : v ds =2v 1.0 10 23 57 0.1 23 57 100 120 80 60 40 20 0 0 20 40 60 80 100 120 140 160 p d -- ta itr02650 ? y fs ? -- i dss drain current, i dss -- a drain current, i dss -- a forward transfer admittance, ? y fs ? -- ms drain current, i dss -- a drain current, i dss -- a ambient temperature, ta -- c allowable power dissipation, p d -- mw drain current, i dss -- a
TF208TH no.7698-4/4 specifications of any and all sanyo products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. sanyo electric co., ltd. strives to supply high-quality high-reliability products. however, any and all semiconductor products fail with some probability. it is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. in the event that any or all sanyo products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of sanyo electric co. , ltd. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "delivery specification" for the sanyo product that you intend to use. information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed for volume production. sanyo believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. this catalog provides information as of march, 2004. specifications and information herein are subject to change without notice. ps
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