187 maximum ratings operating temperature: -65c to +175c storage temperature: -65c to +175c forward voltage @ 200ma: 1.2 volts maximum electrical characteristics @ 25c cdi nominal zener max. dc type zener test maximum zener impedance zener max. reverse number voltage current current leakage current v z @1 zt 1 zt z zt @ 1 zt z zk @ i zk =1ma 1 zm l r @ v r (note 1) (note 2) (note 3) volts ma ohms ohms ma a volts cd3821 3.3 76 10 400 276 100 1 cd3821a 3.3 76 10 400 276 100 1 cd3822 3.6 69 10 400 252 75 1 cd3822a 3.6 69 10 400 252 75 1 cd3823 3.9 64 9 400 238 25 1 cd3823a 3.9 64 9 400 238 25 1 cd3824 4.3 58 9 400 213 5 1 cd3824a 4.3 58 9 400 213 5 1 cd3825 4.7 53 8 500 194 5 1 cd3825a 4.7 53 8 500 194 5 1 cd3826 5.1 49 7 550 178 3 1 CD3826A 5.1 49 7 550 178 3 1 cd3827 5.6 45 5 600 162 3 2 cd3827a 5.6 45 5 600 162 3 2 cd3828 6.2 41 2 700 146 3 3 cd3828a 6.2 41 2 700 146 3 3 note 1 zener voltage range equals nominal voltage + 5% for ?a? suffix no suffix denotes + 10%. "c" suffix denotes + 2%, "d" suffix denotes + 1%. note 2 zener voltage is read using a pulse measurement, 10 milliseconds maximum. note 3 zener impedance is derived by superimposing on 1 zt a 60hz rms a.c. current equal to 10% of 1 zt . ? 1n3821a thru 1n3828a available in janhc ? per mil-prf-19500/115 ? 1 watt capability with proper heat sinking ? all junctions completely protected with silicon dioxide ? compatible with all wire bonding and die attach techniques, with the exception of solder reflow cd3821 thru cd3828a backside is cathode figure 1 design data metallization: top: (anode).................... .al back: (cathode).............. ...au al thickness ....... ....25,000 ? min gold thickness ........4,000 ? min chip thickness ..................10 mils circuit layout data: for zener operation, cathode must be operated positive with respect to anode. tolerances: all dimensions + 2 mils 6 lake street, lawrence, massachusetts 01841 phone (978) 620-2600 fax (978) 689-0803 website: http://www.microsemi.com
188 cd3821a thru cd3828a .1 .2 .5 1 2 5 10 20 50 100 operating current i zt (ma) figure 3 zener impedance vs. operating current zener impedance z zt (ohms) 1000 500 400 300 200 100 50 40 30 20 10 5 4 3 2 1 5.1 volt 6.2 volt 3.3 volt
|
