• 1N821 THRU 1N829 AVAILABLE IN PER MIL-PRF-19500/159 JANHC AND JANKC CD821 thru • MONOLITHIC TEMPERATURE COMPENSATED ZENER REFERENCE CHIPS • ALL JUNCTIONS COMPLETELY PROTECTED WITH SILICON DIOXIDE CD829A • ELECTRICALLY EQUIVALENT TO 1N821 THRU 1N829 • COMPATIBLE WITH ALL WIRE BONDING AND DIE ATTACH TECHNIQUES, WITH THE EXCEPTION OF SOLDER REFLOW MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C REVERSE LEAKAGE CURRENT 22 MILS lR = 2 µA @ 25°C & VR = 3 Vdc ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified. CDI TYPE NUMBER ZENER VOLTAGE V @I ZT ZT ZENER TEST CURRENT I ZT MAXIMUM ZENER IMPEDANCE ZZT -55° TO +100° VOLTAGE EFFECTIVE TEMPERATURE TEMPERATURE STABILITY COEFFICIENT ³VZT (Note 1) (Note 2) VOLTS mA OHMS mV % / °C CD821 5.9 - 6.5 7.5 15 96 0.01 CD821A 5.9 - 6.5 7.5 10 96 0.01 CD823 5.9 - 6.5 7.5 15 48 0.005 CD823A 5.9 - 6.5 7.5 10 48 0.005 CD825 5.9 - 6.5 7.5 15 19 0.002 CD825A 5.9 - 6.5 7.5 10 19 0.002 CD826 5.9 - 6.5 7.5 15 20 0.002 CD827 5.9 - 6.5 7.5 15 9 0.001 CD827A 5.9 - 6.5 7.5 10 9 0.001 CD828 6.2 - 6.9 7.5 15 10 0.001 CD829 5.9 - 6.5 7.5 15 5 0.0005 CD829A 5.9 - 6.5 7.5 10 5 0.0005 NOTE 1 Zener impedance is derived by superimposing on lZT A 60Hz rms a.c. current equal 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. 6 LAKE STREET, LAWRENCE, PHONE (978) 620-2600 WEBSITE: http://www.microsemi.com Backside is not cathode and must be electrically isolated T = Metallization Test Pad DESIGN DATA METALLIZATION: Top: C (Cathode) ..................Al A (Anode) ..................... Al Back: .......................................Au AL THICKNESS.........25,000 Å Min GOLD THICKNESS......4,000 Å Min CHIP THICKNESS. ..............10 Mils CIRCUIT LAYOUT DATA: Backside must be electrically isolated. Backside is not cathode. For Zener operation cathode must be operated positive with respect to anode. TOLERANCES: ALL Dimensions + 2 mils M A S S A C H U S E T T S 01841 FAX (978) 689-0803 177 CD821 thru CD829A ZENER IMPEDANCE ZZT (OHMS) 500 100 50 10 5 1 5 6 7 8 9 10 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 OPERATING CURRENT lZT (mA) 9.0 9.5 FIGURE 4 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT 178