1N821-1N829A TEMPERATURE COMPENSATED ZENER REFERENCE DIODE High-reliability discrete products and engineering services since 1977 FEATURES Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number. Available as non-RoHS (Sn/Pb plating), standard, and as RoHS by adding “-PBF” suffix. MAXIMUM RATINGS Operating and storage temperature range -65°C to +175°C DC power dissipation 500mW @ TL = 25°C and maximum current lZM OF 70mA. For optimum voltage-temperature stability, lZ = 7.5mA (less than 50 mW in dissipated power) Solder temperatures 260°C for 10 s (max) ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified) Part number VZ @ lZT Zener Test Current lZT Zener voltage (Note 1 and 4) Maximum zener impedance (Note 2) ZZT @ lZT Maximum reverse current lR @ 3V Voltage temperature stability (ΔVZT MAX) -55°C to = 100°C (Note 3 and 4) Effective temperature coefficient αVZ VOLTS mA OHMS μA mV %/°C 1N821 5.9-6.5 7.5 15 2.0 96 0.01 1N821A 5.9-6.5 7.5 10 2.0 96 0.01 1N822† 5.9-6.5 7.5 15 2.0 96 0.01 1N823 5.9-6.5 7.5 15 2.0 48 0.005 1N823A 5.9-6.5 7.5 10 2.0 48 0.005 1N824† 5.9-6.5 7.5 15 2.0 48 0.005 1N825 5.9-6.5 7.5 15 2.0 19 0.002 1N825A 5.9-6.5 7.5 10 2.0 19 0.002 1N826 6.2-6.9 7.5 15 2.0 20 0.002 1N827 5.9-6.5 7.5 15 2.0 9 0.001 1N827A 5.9-6.5 7.5 10 2.0 9 0.001 1N828 6.2-6.9 7.5 15 2.0 10 0.001 1N829 5.9-6.5 7.5 15 2.0 5 0.0005 1N829A 5.9-6.5 7.5 10 2.0 5 0.0005 † Double Anode; electrical specifications apply under both bias polarities. NOTES: 1. Add a “-1” suffix for internal metallurgical bond. 2. Zener impedance measured by superimposing 0.75 mA ac rms on 7.5mA dc @ 25°C. 3. The maximum allowable change observed over the entire temperature range, i.e. the diode voltage will not exceed the specified mV change at discrete temperature between the established limits. 4. Voltage measurements to be performed 15 seconds after application of dc current. Rev. 20160114 High-reliability discrete products and engineering services since 1977 1N821-1N829A TEMPERATURE COMPENSATED ZENER REFERENCE DIODE MECHANICAL CHARACTERISTICS Case DO-7 Marking Body painted, alpha numeric Polarity Cathode Band Rev. 20160114