The document introduces the 1N821UR to 1N829AUR-1 series of temperature compensated surface mount Zener reference diodes. These reference diodes provide a selection of both 6.2V and 6.55V nominal voltages and temperature coefficients to as low as 0.0005%/oC for minimal voltage change with temperature when operated at 7.5mA. These glass surface mount DO-213AA (MELF) reference diodes are optionally available with an internal-metallurgical bond by adding a “-1” suffix. This type of bonded Zener package construction is also available in JAN, JANTX, and JANTXV military qualifications. Microsemi also offers numerous other Zener reference diode products for a variety of other voltages up to 200V.
The 1N821UR‑1 through 1N829AUR‑1 series are surface‑mount Zener reference diodes offering 6.2 V or 6.55 V nominal voltages with very low temperature coefficients (as low as 0.0005 %/°C). They are supplied in a hermetically sealed glass DO‑213AA (MELF) package and are available with an internal metallurgical bond (suffix “‑1”).
Electrical characteristics include a test current of 7.5 mA for optimal voltage‑temperature stability, a power dissipation of 500 mW at 25 °C, and operating temperature limits from –65 °C to +175 °C. Mechanical data list a weight of 0.04 g and standard tape‑and‑reel packaging per EIA‑481‑B.
| Nominal voltage | 6.2 V or 6.55 V |
|---|---|
| Temperature coefficient | 0.01 %/°C to 0.0005 %/°C |
| Test current | 7.5 mA |
| Power dissipation | 500 mW at 25 °C |
| Operating temperature range | -65 °C to +175 °C |
| Storage temperature range | -65 °C to +175 °C |
| Package | DO‑213AA (MELF) |
| Weight | 0.04 g |
The series provides either 6.2 V or 6.55 V nominal voltage options.
Temperature coefficients range from 0.01 %/°C down to 0.0005 %/°C.
A test current of 7.5 mA is recommended for optimal stability.
They operate from –65 °C up to +175 °C.