AMERICAN POWER DEVICES SUE D MB 0737135 0000058 S4uT MMAPD 7 1N935-1N938 american 1N935A-1N9O38A 1N935B-1N938B mtr power devices, inc. 500 mW temperature compensated MECHANICAL zener reference diodes CHARACTERISTICS FEATURES *9,0 V stable references + Guaranteed maximum %/c Hermetically sealed glass package MAXIMUM RATINGS * Derate above 50C: 3.33mW/C These silicon devices are low-level, temperature compensated, zener reference diodes. Oxide-passivated junctions give them stability and make these diodes highly reliable reference sources. Glass-enclosed construction provides a rugged, hermetically sealed unit. ELECTRICAL CHARACTERISTICS @T, = 25C Junction Temperature: -65C to +200C Storage Temperature: -65C to +200C * DC Power Dissipation: 500mW @ T,<50C VOLTAGE MAXIMUM TEMPERATURE ZENER ZENER ZENER STABILITY EFFECTIVE JEDEC VOLTAGE TEST IMPEDANCE SV7T TEMPERATURE | TEMPERATURE TYPE CURRENT (Note 1) MAXIMUM RANGE COEFFICIENT NUMBERS V2 @ lzt zt 27T (Note 2) VOLTS mA OHMS mv *c %/E 1N935 855-945 75 20 67 Oio+ 75 00) 1N935A 855-945 75 20 139 -5 to +100 00) 1N935B 855.945 75 20 184 +35 to +150 0.01 1N936 855.945 75 20 34 Oto+ 75 0005 1N936A B55 945 75 20 70 -55 10 +100 0005 1N936B 8.55 945 75 29 92 -55 to +150 0005 1N937 855.945 75 20 13 Oto? 75 0 002 1N937A 855-945 75 20 28 -55 to +100 0002 1N9378 855.945 75 20 37 ~55 to 150 0002 1N938 855.945 75 20 67 Oto* 75 0001 1N938A 855.945 75 20 139 -55 to +100 000) 1N938B 855 945 75 20 i8 -55 to 150 0001 Note 1 The zener impedance is denved from the 60 Hz ac voltage, which resulis when an ac current having an rms vaiue equal to 10% of the DC zener current (1_,) !s superimposed on l,,. Zener impedance is measured al two points to insure a sharp knee at breakoown thus eliminaung unstable devices. Note 2 The maximum allowable change over the entire temperature range, | &. the diode voltage will not exceed the specified mV al any discrete lemperature between the established limits. fo 4? 2.107 MAX 272 DIA _ agen ote FIGURE 1 ail dimensions in INCH mm CASE: Hermetically sealed glass package (DO-7) FINISH: Corrosion resistant. Leads are tin plated. THERMAL RESISTANCE: 250C (typ) junction to ambient. POLARITY: Cathode banded. WEIGHT; 0.2 grams (typ). This series also offered in DO-35 package. Consult factory for availability. Fg MAXIM POWER DISSEPATEON CWAITSI Figure 2 POWER DERATING 69 bennet Street. lvnn. ma 01905-3067 = tel.: 617 592-6090 fax: 617 592-0677 AMERICAN POWER DEVICES SSE D MM 0737135 0000059 4&8b MAPD 1N935-1N938 american 4N935A-1N938A 1N935B-1N938B wEracsy Power devices, inc. TYPICAL CHARACTERISTICS = eed nein tag acai ale ate De teas pied me daa Lab be Peete des ees it Peet Lapa ZENER IMPEDANCE Z2t (O1IMS) 8g OPERATING CURRENT iz* (mA) Figure 3 CHANGE OF ZENER IMPEDANCE VERSUS CHANGE IN OPERATING CURRENT +0.008 +0540 a o =o +0.004 +0360 as 8 +0.002 40.180 RS =~ oe Fe 0 o 23 zg = = _ a3 3 0.002 0.180 a <5 2 => 0.004 75 0.360 2S 0.006 - 2.4 8 10 12 4 16 18 20 1,, OPERATING CURRENT (mA) Figure 4 CHANGE OF TEMPERATURE COEFFICIENT VERSUS CHANGE IN OPERATING CURRENT ap core JRA 95% OF THE UNITS AME IN THE RANGES INDICATED BY THE CURVE: Tr" 435 on 55C 1 UP +150 , ODS a7s0 qzan z 80 fe s 2 70 ec > o = 60 = +150 wd 2 6.0 47505 me, 40 va 18D -100 5D 0 $0 100 Vz MAXIMUM VOLTAGE CHANGE wmv) (Referenced to l27* 75 ma) Figure ZENER CURRENT VERSUS MAXIMUM VOLTAGE CHANGE 69 bennett street, lynn, ma 01905-3067 tel.: 617 592-6090 fax: 617 592-0677