CERTIFIED REFERENCE VOLTAGE STABILITY bB3E D MM 2302554 OO00478 4b4 MECDI TIME VOLTAGE STABILITY TO 10 PPM/1000 HOURS | : 6.35 VOLTS NOMINAL + 5% | : N48 90 * METALLURGICALLY BONDED - 1IN4895A DOUBLE PLUG CONSTRUCTION | COMPENSATED DEVICES INC MAXIMUM RATINGS 7 Operating Temperature: -65 C to +200 C mo Storage Temperature: -65 C to +200 C yt DC Power Dissipation: 500mW @ 50C | , Power Derating: 3.33 mWP C above 50 C ee rie This series of Ultra-Stable Reference Diodes offers a CERTIFIED REFERENCE VOLTAGE STABILITY . - measured over an operating period of 1000 hours. Standard stabilities are 10, 20, and 50 PPM/1000 hours. . Ultra-Stable Certified Reference Diodes are to be used in circuits that require an extremely high degree a2 min. | of voltage time stability. : This series is subjected to a 1000 hour Stability Test Sequence, consisting of a 1000 hour power age with reference voltage measured once every 168 hours giving a total of 7 individual test points. The stability test is performed at 80C + 0.1C. A Certificate containing the following data is supplied with each diode. POLARITY * 9300 way 1. The stability test voltage readings. oft: 7520 2. The voltage drift as referenced to "Zero Hour in pV. ELECTRICAL CHARACTERISTICS @ 25C, unless otherwise specified. mm VOLTAGE , ant | es od TIME : Dia, ~l]n oe VOLTAGE STABILITY EFFECTIVE teri Ta Pee JEDEC NOMINAL | ZENER | MAXIMUM | TEMPERATURE @ 80C VOLTAGE , v TYPE ZENER TEST ZENER STABILITY EFFECTIVE | INITIAL-TO PEAK TIME : qa NUMBER | VOLTAGE | CURRENT | IMPEDNACE Aer TEMPERATURE AV2T STABILITY : : ir "os 5% 40.01 mA 227 @lzz MAXIMUM TEMPERATURE } COEFFICIENT MAXIMUM INITIAL-TO- All- dimensions in JNtH Vz@ ky ler (NOTE 1) (NOTE 2) RANGE Hya (NOTE 3) PEAK am VOLTS mA OHMS mV c wc xVio00 HRS. | PPMP1000 HRS. FIGURE 1 sas 1N4890 6.35 75 10 50 2510100 | 0.001 318 50 pz, wo 1N4890A 6.35 75 10 10.0 55to100 | 0.001 318 50 DESIGN DATA aoe 1N4891 6.35 75 10 25 25 to 100 0.0005 318 50 1N48Q1A 6.35 75 10 5.0 55 to 100 0.0005 318 50 CASE: Hermetically sealed: glass case. DO-7 outtine. 1N4892 6.35 75 10 5.0 25 to 100 0.001 127 20 {Also Available in DO-35 package in4soza | 6.35 75 10 10.0 | -85t0100 | 0.001 127 20 See page 9 for Outline Drawing) 1N4893 6.35 75 10 25 25 to 100 0.0005 127 20 LEAD MATERIAL: Copper clad 1N4893A 6.35 75 10 50 8510100 | 0.0005 127 20 steel. LEAD FINISH: TinfLead 1N4894 6.35 75 10 50 25 to 100 0 001 64 10 THERMAL RESISTANCE: R,,, at /e 1N4894A 6.35 75 10 10.0 55 to 100 0.001 64 10 Lead Spacing = 250 C $i imum 1N4895 6.35 75 10 25 25 to 100 0.0005 64 10 IN4B95A 6.35 75 10 5.0 55 io 100 0.0005 64 10 POLARITY: Diode to be oper~ ated with the banded (cathode) end positive with NOTE 1 Zener impedance is derived by superimposing on Izt a 60Hz rms a.c. current equal to respect to the opposite end. 10% of It. WEIGHT: 0.2 grams, NOTE2 The maximum allowable change observed over the entire temperature range 1e., the | MOUNTING POSITION: Any. diode voltage will not exceed the specified mV at any discrete temperature between the established hmits, per JEDEC standard 5-A. NOTE 3 Under conditions of: lp7T = 7.5 MA + 0.0001 mA Ta = 80C + 0.1C CDi COMPENSATED DEVICES INCORPORATED 166 TREMONT STREET, MELROSE, MASSACHUSETTS 02176 PHONE (617) 665-1071 FAX (617) 665-7379 35COMPENSATED DEVICES INC b3E D MM 2302554 0000479 3T4 MECDI 1N4890 thru 1N4895A +.0010E3 +,005| -.0010 cary Ane HE 55 60 65) (7.0 (7.580850 OLS CHANGE IN TEMPERATURE COEFFICIENT (%/C) I OPERATING CURRENT Izt (mA) FIGURE 3 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT ZENER IMPEDANCE Zzt (OHMS) 5 6 7 8 9 10 OPERATING CURRENT Izt (mA) FIGURE 4 TYPICAL CHANGE OF ZENER IMPEDANCE WITH CHANGE IN OPERATING CURRENT 20 10 VOLTAGE DEVATION OO __" = S| INPPM 49 20 0 168 336 504 672 840 1008 FIGURE 5 OPERATING TEST TIME IN HOURS TYPICAL AVz7 PLOT OF A 1N4895