1N4573A

Single Zener Diodes Overview

The Microchip Technology 1N4573A is a 6.4 V temperature compensated Zener reference diode housed in a DO-7 (DO-204AA) glass axial-leaded package. It operates at a test current of 1.0 mA with a maximum voltage temperature coefficient of 0.001%/°C (0.06 mV/°C). The device features a nominal voltage tolerance of ±5%, a maximum reverse current of 2 µA at 3 V, and a dynamic impedance of 100 Ω at the test current. It supports an operating temperature range from -55°C to +100°C.

Single Zener Diodes Feature Summary

• Provides minimal voltage change over a broad operating temperature range for instrumentation and other circuit designs requiring a voltage reference
• Internal metallurgical bonded construction for enhanced reliability
• Flexible axial-leaded mounting terminals suitable for through-hole applications

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Temperature compensated power supply designs
• Precision analog signal conditioning systems

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against the datasheet when ordering tighter voltage tolerances or military qualifications. Confirm that the DO-7 package matches the target PCB footprint. Ensure the operating current aligns with the specified 1.0 mA test condition for optimal stability. Check for radiation hardened variants if the application involves space-grade environments.

Single Zener Diodes Selection Notes

Select this component when a 6.4 V reference with low temperature drift is required. Compare the 0.001%/°C coefficient against alternatives like the 1N4572A or 1N4574A based on strict thermal stability needs. Consider the 100 Ω dynamic impedance for noise-sensitive AC superimposition scenarios. Evaluate the 500 mW power dissipation limit relative to the expected DC bias conditions.

Single Zener Diodes Part Context

This part belongs to the 1N4565 thru 1N4584A-1 series of Zero-TC Reference Diodes manufactured by Microsemi (now Microchip Technology). The series offers various temperature coefficients and operating currents ranging from 0.5 mA to 4.0 mA. These diodes are JEDEC registered and available in military qualifications such as JAN, JANTX, and JANTXV with appropriate prefixes.

Single Zener Diodes Replacement Considerations

JAN1N4573A, JANTX1N4573A, JANTXV1N4573A, 1N4573A-1, 1N4573A-1-1%

Single Zener Diodes FAQ

How does the operating current affect the temperature coefficient?

The temperature coefficient varies slightly with changes in operating current. The datasheet provides graphs showing the typical change in temperature coefficient and Zener voltage as the operating current deviates from the specified 1.0 mA test current.

What is the polarity configuration for this reference diode?

The reference diode must be operated with the banded end positive with respect to the opposite end.