1N3154A-1

Overview

The Microchip Technology 1N3154A-1 is an 8.4 Volt Temperature Compensated Zener Reference Diode housed in a hermetically sealed glass DO-7 (DO-204AA) axial-lead package. It operates within a temperature range of -55°C to +150°C with a maximum temperature coefficient of 0.01%/°C. The device maintains a nominal voltage between 8.00V and 8.80V at a test current of 10mA, featuring a maximum impedance of 15 ohms and reverse current of 10µA at 5.5V.

Feature Summary

• Provides minimal voltage change over a broad temperature range for stable reference applications
• Features internal metallurgical bonds and flexible axial-lead mounting terminals
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Instrumentation requiring stable voltage references
• Circuit designs demanding minimal voltage changes across temperature variations
• Military qualification systems utilizing JAN, JANTX, or JANTXV prefixes

Procurement Notes

Verify the specific suffix requirements when ordering, as tighter voltage tolerances require hyphenated identifiers such as -1% or -2%. Confirm RoHS compliance status if military qualifications are not required, noting that e3 suffixes apply only to commercial products. Ensure the operating current aligns with stability specifications, typically 10.0 mA, to achieve optimal performance characteristics defined in the datasheet.

Selection Notes

Select this component when a precise 8.4V reference with low temperature drift is necessary. The 1N3154A-1 variant offers a maximum temperature coefficient of 0.01%/°C over a -55°C to +150°C range. Consider radiation-hardened RH-prefix alternatives for space-grade environments or military prefixes for enhanced reliability standards beyond standard JEDEC registrations.

Part Context

This diode belongs to the popular 1N3154 thru 1N3157A series of Zero-TC Reference Diodes manufactured by Microsemi Scottsdale Division. The series provides a selection of 8.4V nominal voltages with varying temperature coefficients down to 0.001%/°C. These devices are designed for applications requiring high stability and are available in various military and commercial configurations.

Replacement Considerations

Radiation hardened equivalents are available by changing the prefix to RH, such as RH3156 or RH3157. Military qualified versions can be identified by adding JAN, JANTX, or JANTXV prefixes to the part number alongside the -1 suffix.

FAQ

How does operating current affect the temperature coefficient?

Operating at currents other than the specified 10mA alters the temperature coefficient. Graphs in the datasheet allow estimation of these changes; for example, operating at 7.5mA shifts the typical temperature coefficient limits compared to the 10mA baseline.

What is the polarity configuration for operation?

The reference diode must be operated with the banded end positive with respect to the opposite end to function correctly as a Zener reference.