6 lake street, lawrence, massachusetts 01841 phone (978) 620-2600 fax (978) 689-0803 website: http://www.microsemi.com 95 cdi zener zener maximum voltage effe ctive type voltage test zener temperature temperature number current impedance stability coefficient v z @ i zt i zt (note 1) 3v zt z zt -55 to +100 (note 2) volts ma ohms mv % / c cdll821 5.9 - 6.5 7.5 15 96 0.01 cdll821a 5.9 - 6.5 7.5 10 96 0.01 cdll822 ? 5.9 - 6.5 7.5 15 96 0.01 cdll823 5.9 - 6.5 7.5 15 48 0.005 cdll823a 5.9 - 6.5 7.5 10 48 0.005 cdll824 ? 5.9 - 6.5 7.5 15 48 0.005 cdll825 5.9 - 6.5 7.5 15 19 0.002 cdll825a 5.9 - 6.5 7.5 10 19 0.002 cdll826 6.2 - 6.9 7.5 15 20 0.002 cdll827 5.9 - 6.5 7.5 15 9 0.001 cdll827a 5.9 - 6.5 7.5 10 9 0.001 cdll828 6.2 - 6.9 7.5 15 10 0.001 cdll829 5.9 - 6.5 7.5 15 5 0.0005 cdll829a 5.9 - 6.5 7.5 10 5 0.0005 maximum ratings operating temperature: -65c to +175c storage temperature: -65c to +175c dc power dissipation: 500mw @ +50c power derating: 4 mw / c above +50c reverse leakage current l r = 2 a @ 25c & v r = 3 vdc electrical characteristics @ 25c, unless otherwise specified. ? double anode: electrical specifications apply under both bias polarities. note 1 zener impedance is derived by superimposing on l zt a 60hz rms a.c. current equal to 10% of l zt . note 2 the maximum allowable change observed over the entire temperature range i.e., the diode voltage will not exceed the specified mv at any discrete temperature between the established limits, per jedec standard no.5. figure 1 design data case: do-213aa , hermetically sealed glass case. (melf, sod-80, ll34) lead finish: tin / lead polarity: diode to be operated with the banded (cathode) end positive. mounting position: any. mounting surface selection: the axial coefficient of expansion (coe) of this device is approximately +6ppm/c. the coe of the mounting surface system should be selected to provide a suitable match with this device. ? 1n821ur-1, 1N823UR-1, 1n825ur-1, 1n827ur-1 and 1n829ur-1 available in jan, jantx, jantxv and jans per mil-prf-19500/159 ? temperature compensated zener diodes ? leadless package for surface mount ? 6.2 and 6.55 volt nominal zener voltages ? metallurgically bonded, double plug construction 1n821ur-1 thru 1n829ur-1 and cdll821 thru cdll829a millimeters inches dim min max min max d 1.60 1.70 0.063 0.067 f 0.41 0.55 0.016 0.022 g 3.30 3.70 .130 .146 g1 2.54 ref. .100 ref. s 0.03 min. .001 min.
96 cdll821 thru cdll829a figure 4 typical change of temperature coefficient with change in operating current +.0010 +.0005 0 -.0005 -.0010 change in temperature coefficient ( %/c) 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 operating current l zt (ma) 0 25 50 75 100 125 150 175 t l , ambient temperature (c) figure 2 power derating curve 600 500 400 300 200 100 0 pd, rated power dissipation (mw) 5678910 operating current l zt (ma) figure 3 zener impedance vs. operating current 500 100 50 10 5 1 zener impedance z zt (ohms)
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