* 1N821-1,1N823-1,1N825-1,1N827-1 AND 1N829-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/159 1N821 thru 1N829A and 1N821-1 thru 1N829-1 * TEMPERATURE COMPENSATED ZENER REFERENCE DIODES * METALLURGICALLY BONDED * DOUBLE PLUG CONSTRUCTION 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 lR = 2A @ 25C & VR = 3 Vdc ELECTRICAL CHARACTERISTICS @ 25C, unless otherwise specified. JEDEC TYPE NUMBER ZENER VOLTAGE vz @ I ZT ZENER TEST CURRENT I ZT MAXIMUM ZENER IMPEDANCE (Note 1) Z ZT VOLTAGE TEMPERATURE STABILITY V ZT -55 to +100 EFFECTIVE TEMPERATURE COEFFICIENT FIGURE 1 (Note 2) VOLTS mA OHMS mV % / C 1N821 1N821A 1N822 5.9--6.5 5.9--6.5 5.9--6.5 7.5 7.5 7.5 15 10 15 96 96 96 0.01 0.01 0.01 1N823 1N823A 1N824 5.9--6.5 5.9--6.5 5.9--6.5 7.5 7.5 7.5 15 10 15 48 48 48 0.005 0.005 0.005 1N825 1N825A 1N826 5.9--6.5 5.9--6.5 6.2--6.9 7.5 7.5 7.5 15 10 15 19 19 20 0.002 0.002 0.002 1N827 1N827A 1N828 5.9--6.5 5.9--6.5 6.2--6.9 7.5 7.5 7.5 15 10 15 9 9 10 0.001 0.001 0.001 LEAD FINISH: Tin / Lead 1N829 1N829A 5.9--6.5 5.9--6.5 7.5 7.5 15 10 5 5 0.0005 0.0005 POLARITY: Diode to be operated with the banded (cathode) end positive. Double Anode: Electrical Specifications Apply Under Both Bias Polarities. NOTE 1 Zener impedance is derived by superimposing on l A 60Hz rms a.c. current equal ZT to 10% of lZT. 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. DESIGN DATA CASE: Hermetically sealed glass case. DO - 35 outline. LEAD MATERIAL: Copper clad steel. MOUNTING POSITION: Any. 22 COREY STREET, MELROSE, MASSACHUSETTS 02176 PHONE (781) 665-1071 FAX (781) 665-7379 WEBSITE: http://www.cdi-diodes.com E-mail: mail@cdi-diodes.com 1N821 1N829A thru INCLUDING -1 VERSIONS 600 500 400 300 200 100 0 25 50 100 150 175 TL, Lead temperature (C) 3/8" from body ZENER IMPEDANCE ZZT (OHMS) Pd, Rated Power Dissipation (mW) 500 100 50 10 5 FIGURE 2 POWER DERATING CURVE 1 5 6 7 8 9 OPERATING CURRENT lZT (mA) FIGURE 3 CHANGE IN TEMPERATURE COEFFICIENT ( %/C) ZENER IMPEDANCE VS. OPERATING CURRENT +.0010 +.0005 0 -.0005 -.0010 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 OPERATING CURRENT lZT (mA) FIGURE 4 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT 10