1N821-1 – 1N829A-1 Available on commercial versions 6.2 & 6.55 Volt Zener Reference Diodes Qualified per MIL-PRF-19500/159 *Qualified Levels: JAN, JANTX, JANTXV and JANS (available on some part numbers) DESCRIPTION The popular 1N821-1 – 1N829A-1 series of temperature compensated reference diodes provides both 6.2 V and 6.55 V nominal voltages and temperature coefficients as low as 0.0005 %/oC at a Zener test current of 7.5 mA. These DO-35 packaged (glass, axial leaded) reference diodes are optionally available as RoHS compliant. This type of bonded Zener package construction is also available in JAN, JANTX, JANTXV and JANS military qualifications where the RoHS compliant “e3” is not an option. Microsemi also offers other Zener Reference Diode products for a variety of voltages up to 200 V. Important: For the latest information, visit our website http://www.microsemi.com. FEATURES • • • • • • • • JEDEC registered 1N821 – 1N829 series. Zener impedance values of 10 ohms and 15 ohms are available. Reference voltage selection of 6.2 V & 6.55 V +/-5% with further tight tolerance options on commercial at lower voltage. (Excludes 1N826 and 1N828.) Temperature compensated. Internal metallurgical bond. Double plug construction. *JAN, JANTX, JANTXV and JANS qualification per MIL-PRF-19500/159 available on 1N821-1, 8231, 825-1, 827-1 and 829-1. RoHS compliant versions available (commercial grade only). DO-35 (DO-204AH) Package Also available in: DO-213AA MELF (surface mount) 1N821UR-1 – 1N829AUR-1 APPLICATIONS / BENEFITS • • • • • • • Provides minimal voltage changes over a broad temperature range. For instrumentation and other circuit designs requiring a stable voltage reference. Maximum temperature coefficient selections available from 0.01 %/ºC to 0.0005 %/ºC. Tight reference voltage tolerances of 1%, 2%, 3%, etc, available on commercial with center nominal value of 6.2 V by special request. (Excludes 1N826 and 1N828.) Flexible axial-lead mounting terminals. Non-sensitive to ESD per MIL-STD-750 method 1020. Typical low capacitance of 100 pF or less. MAXIMUM RATINGS @ T A = +25 ºC unless otherwise specified Parameters/Test Conditions Junction and Storage temperature (1) Power Dissipation Maximum Zener Current Solder Pad Temperatures at 10 s Symbol Value T J and T STG PD I ZM T SP -55 to +175 Unit o C 500 mW 70 mA 260 o C Notes: 1. At T L = 25 oC and maximum current I ZM of 70 mA. For optimum voltage-temperature stability, I Z = 7.5 mA (less than 50 mW in dissipated power). Derate at 3.33 mW/oC above T A = +25 oC. MSC – Lawrence 6 Lake Street, Lawrence, MA 01841 1-800-446-1158 Tel: (978) 620-2600 Fax: (978) 689-0803 MSC – Ireland Gort Road Business Park, Ennis, Co. Clare, Ireland Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298 Website: www.microsemi.com T4-LDS-0220, Rev. 2 (7/29/13) ©2013 Microsemi Corporation Page 1 of 5 1N821-1 – 1N829A-1 MECHANICAL and PACKAGING • • • • • • • CASE: Hermetically sealed glass case. DO-35 (DO-204AH) package. TERMINALS: Tin-lead (military) or RoHS compliant annealed matte-tin plating (commercial grade only) solderable per MIL-STD750, method 2026. MARKING: Part number and cathode band (except double anode 1N822-1 and 1N824-1). POLARITY: Reference diode to be operated with the banded end positive with respect to the opposite end. TAPE & REEL option: Standard per EIA-296 (add “TR” suffix to part number). Consult factory for quantities. WEIGHT: Approximately 0.2 grams. See Package Dimensions on last page. PART NOMENCLATURE Applicable to: JAN, JANTX, JANTXV and JANS of 1N821, 1N823, 1N825, 1N827, and 1N829 only: JAN 1N821 -1 Reliability Level JAN = JAN Level JANTX = JANTX Level JANTXV = JANTXV Level JANS = JANS Level Blank = Commercial Metallurgical Bond JEDEC type number (see Electrical Characteristics table) Applicable to: commercial 1N821, 1N823, 1N825, 1N827, and 1N829 only: 1N821 A -1 (e3) JEDEC type number (see Electrical Characteristics table) RoHS Compliance e3 = RoHS compliant Blank = non-RoHS compliant Zener Impedance A = 10 ohms Blank = 15 ohms Metallurgical Bond Applicable to: 1N822, 1N824, 1N826 and 1N828 only: 1N822 -1 (e3) JEDEC type number (see Electrical Characteristics table) RoHS Compliance e3 = RoHS compliant Blank = non-RoHS compliant Metallurgical Bond T4-LDS-0220, Rev. 2 (7/29/13) ©2013 Microsemi Corporation Page 2 of 5 1N821-1 – 1N829A-1 SYMBOLS & DEFINITIONS Definition Symbol IR I Z , I ZT , I ZK VZ Z ZT or Z ZK Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature. Regulator Current: The dc regulator current (I Z ), at a specified test point (I ZT ), near breakdown knee (I ZK ). Zener Voltage: The Zener voltage the device will exhibit at a specified current (I Z ) in its breakdown region. Dynamic Impedance: The small signal impedance of the diode when biased to operate in its breakdown region at a specified rms current modulation (typically 10% of I ZT or I ZK ) and superimposed on I ZT or I ZK respectively. o ELECTRICAL CHARACTERISTICS @ 25 C (unless otherwise specified) JEDEC TYPE NUMBER 1N821-1 1N821A-1 1N822-1† 1N823-1 1N823A-1 1N824-1† 1N825-1 1N825A-1 1N826-1 1N827-1 1N827A-1 1N828-1 1N829-1 1N829A-1 ZENER VOLTAGE V Z @ I ZT (Note 3) ZENER TEST CURRENT I ZT MAXIMUM ZENER IMPEDANCE Z ZT @ I ZT (Note 1) MAXIMUM REVERSE CURRENT IR @ 3 V Volts mA Ohms 5.89-6.51 5.89-6.51 5.9-6.5 5.89-6.51 5.89-6.51 5.9-6.5 5.89-6.51 5.89-6.51 6.2-6.9 5.89-6.51 5.89-6.51 6.2-6.9 5.89-6.51 5.89-6.51 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 15 10 15 15 10 15 15 10 15 15 10 15 15 10 µA 2 2 2 2 2 2 2 2 2 2 2 2 2 2 VOLTAGE TEMPERATURE STABILITY (∆V ZT MAX) -55oC to +100oC (Note 2 and 3) mV EFFECTIVE TEMPERATURE COEFFICIENT α VZ 96 96 96 48 48 48 19 19 20 9 9 10 5 5 0.01 0.01 0.01 0.005 0.005 0.005 0.002 0.002 0.002 0.001 0.001 0.001 0.0005 0.0005 % / oC † Double Anode: Electrical specifications apply under both bias polarities. NOTES: 1. 2. 3. Zener impedance is measured by superimposing 0.75 mA ac rms on 7.5 mA dc @ 25 oC. The maximum allowable change observed over the entire temperature range i.e., the diode voltage will not exceed the specified mV change at any discrete temperature between the established limits. Voltage measurements to be performed 15 seconds after application of dc current. T4-LDS-0220, Rev. 2 (7/29/13) ©2013 Microsemi Corporation Page 3 of 5 1N821-1 – 1N829A-1 Zener Impedance IZT (Ohms) GRAPHS Operating Current I ZT (mA) ∆VZ – Change in Zener Voltage (mV) o Change in temperature coefficient (%/ C) FIGURE 1 TYPICAL ZENER IMPEDANCE vs OPERATING CURRENT I Z – Operating Current (mA) FIGURE 2 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT The curve shown in Figure 2 is typical of the diode series and greatly simplifies the estimation of the Temperature Coefficient (TC) when the diode is operated at currents other than 7.5 mA. EXAMPLE: A diode in this series is operated at a current of 7.5 mA and has specified Temperature Coefficient (TC) limits of +/-0.005 %/oC. To obtain the typical Temperature Coefficient limits for this same diode operated at a current of 6.0mA, the new TC limits (%/oC) can be estimated using the graph in Figure 2. At a test current of 6.0mA the change in Temperature Coefficient (TC) is approximately –0.0006 %/oC. The algebraic sum of +/-0.005 %oC and –0.0006 %/oC gives the new estimated limits of +0.0044 %/oC and -0.0056 %/oC. T4-LDS-0220, Rev. 2 (7/29/13) ©2013 Microsemi Corporation I Z – Operating Current (mA) FIGURE 3 TYPICAL CHANGE OF ZENER VOLTAGE WITH CHANGE IN OPERATING CURRENT This curve in Figure 3 illustrates the change of diode voltage arising from the effect of impedance. It is in effect an exploded view of the Zener operating region of the I-V characteristic. In conjunction with Figure 2, this curve can be used to estimate total voltage regulation under conditions of both varying temperature and current. Page 4 of 5 1N821-1 – 1N829A-1 PACKAGE DIMENSIONS Ltr BD BL LD LL LL 1 Inch Min 0.055 0.120 0.018 1.000 Dimensions Millimeters Max Min Max 0.090 1.40 2.29 0.200 3.05 5.08 0.022 0.46 0.56 1.500 25.40 38.10 0.050 1.27 Notes 3 3 4 NOTES: 1. Dimensions are in inches. 2. Millimeters are given for information only. 3. Package contour optional within BD and length BL. Heat slugs, if any shall be included within this cylinder but shall not be subject to minimum limit of BD. 4. Within this zone, lead diameter may vary to allow for lead finishes and irregularities, other than heat slugs. 5. In accordance with ASME Y14.5M, diameters are equivalent to Φx symbology. T4-LDS-0220, Rev. 2 (7/29/13) ©2013 Microsemi Corporation Page 5 of 5