• MONOLITHIC TEMPERATURE COMPENSATED ZENER REFERENCE CHIPS CD935 thru • ALL JUNCTIONS COMPLETELY PROTECTED WITH SILICON DIOXIDE • 9.0 VOLT NOMINAL ZENER VOLTAGE + 5% CD937A • ELECTRICALLY SIMILAR TO 1N935 THRU 1N937A • COMPATIBLE WITH ALL WIRE BONDING AND DIE ATTACH TECHNIQUES, WITH THE EXCEPTION OF SOLDER REFLOW 38 MILS MAXIMUM RATINGS 23 MILS FIGURE 1 ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified. TYPE NUMBER ZENER VOLTAGE V ZT @I ZT ZENER TEST CURRENT I ZT (Note 3) VOLTS mA MAXIMUM MAXIMUM VOLTAGE ZENER TEMPERATURE IMPEDANCE STABILITY ZZT V ZT (Note 1) (Note 2) OHMS mV 8 MILS 23 MILS 38 MILS 10 MILS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C TEMPERATURE EFFECTIVE RANGE TEMPERATURE COEFFICIENT °C % / °C CD935 9.0 7.5 30 67 0 to + 75 0.01 CD935A 9.0 7.5 30 139 -55 to + 100 0.01 CD936 9.0 7.5 30 34 0 to + 75 0.005 CD936A 9.0 7.5 30 70 -55 to + 100 0.005 CD937 9.0 7.5 30 13 0 to + 75 0.002 CD937A 9.0 7.5 30 28 -55 to + 100 0.002 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 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. NOTE 3 Zener voltage range equals 9.0 volts + 5%. 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 22 COREY STREET, MELROSE, MASSACHUSETTS 02176 PHONE (781) 665-1071 FAX (781) 665-7379 WEBSITE: http://www.cdi-diodes.com E-mail: [email protected] CD935 thru CD937A 1000 ZENER IMPEDANCE ZZT (OHMS) 500 200 100 50 20 10 5 6 7 8 OPERATING CURRENT lZT (mA) 9 10 FIGURE 2 ZENER IMPEDANCE VS. OPERATING CURRENT CHANGE IN TEMPERATURE COEFFICIENT ( %/°C) +.0015 +.0010 +.0005 0 -.0005 -.0010 -.0015 5 6 7 8 OPERATING CURRENT lZT (mA) 9 FIGURE 3 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT 10