LT1021DMH-7

Voltage Reference Overview

The LT1021DMH-7 is a precision voltage reference utilizing buried zener technology, housed in an 8-lead TO-5 metal can package. It provides a fixed nominal output voltage of 7V with a maximum temperature drift slope of 5ppm/°C and ripple rejection exceeding 100dB. The device operates within a commercial temperature range of 0°C to 70°C, drawing a typical supply current of 1.2mA. It supports both series and shunt regulator configurations, capable of sourcing or sinking up to 10mA of load current while maintaining excellent long-term stability.

Voltage Reference Feature Summary

• Utilizes buried zener diode structure for ultralow noise and superior long-term stability compared to surface breakdown devices.
• Offers immunity to input voltage variations with high ripple rejection characteristics.
• Capable of functioning as a three-terminal series reference or a two-terminal shunt regulator.
• Features minimal thermal regulation effects and reduced temperature-induced hysteresis.

Voltage Reference Applications

• A/D and D/A converters
• Precision regulators
• Digital voltmeters
• Inertial navigation systems
• Portable reference standards

Voltage Reference Procurement Notes

Verify the specific suffix 'MH' corresponds to the TO-5 metal can package configuration required for your design. Confirm that the commercial operating temperature range (0°C to 70°C) meets your environmental specifications. Ensure input voltage differentials remain within the specified limits to maintain performance and prevent damage to the internal structure.

Voltage Reference Selection Notes

Select this component when ultralow drift and noise are critical requirements for high-precision analog circuits. The 7V output is suitable for applications requiring a stable mid-range reference without external trimming. Consider the TO-5 package for its robust shielding against air turbulence-induced thermoelectric noise, which is essential for achieving the lowest possible low-frequency noise performance.

Voltage Reference Part Context

The LT1021 family represents a class of precision references designed without on-chip heaters, achieving ultralow drift through unique circuit architecture. The DMH variant specifically denotes the military-grade or high-reliability version within the standard LT1021 lineup, packaged in a hermetic metal can to ensure stability in demanding environments.

Voltage Reference Replacement Considerations

LT1021BMH-7

Voltage Reference FAQ

Does the LT1021DMH-7 have a trim pin?

No, the 7V version of the LT1021 does not include a trim pin because its internal architecture lacks a convenient point for external adjustment.

How should the LT1021 be shielded to minimize noise?

To achieve the lowest noise levels, the reference must be shielded from ambient air turbulence, such as using a small enclosure, to prevent thermoelectric voltage noise caused by temperature gradients on the leads.