LT1034CH-2.5

Voltage Reference Overview

The LT1034CH-2.5 is a micropower, precision dual voltage reference from Analog Devices. It integrates a trimmed, thin-film band-gap reference providing 2.5V with guaranteed 20 ppm/°C drift and a 7V auxiliary subsurface zener reference. The device operates on a current of 20 mA and features low dynamic impedance for use with unregulated supplies. It offers high initial accuracy, low temperature cycling hysteresis, and good long-term stability.

Voltage Reference Feature Summary

• Dual-output architecture combining a precision band-gap reference with an auxiliary zener reference
• Guaranteed low temperature drift for the primary reference output
• Low dynamic impedance design suitable for unregulated supply applications
• Micropower operation requiring minimal quiescent current

Voltage Reference Applications

• Portable meters
• Precision regulators
• Calibrators

Voltage Reference Procurement Notes

Verify the specific suffix CH against the manufacturer's documentation to confirm package type and operating temperature range. Confirm availability status as older part numbers may have limited stock or obsolescence notices. Ensure the required tolerance and drift specifications match the application requirements before ordering.

Voltage Reference Selection Notes

Select this component when a dual-reference solution is needed within a single package. The 2.5V band-gap output provides high precision for critical measurements, while the 7V output serves less demanding auxiliary functions. Consider the 20mA operating current and thermal characteristics relative to the available PCB space and power budget.

Voltage Reference Part Context

This component belongs to the LT1034 family of micropower dual references. It serves as a high-performance upgrade for legacy components like the LM385 or LT1004 where guaranteed temperature drift is essential. The family includes variants with different outputs (1.2V, 2.5V) and packages (SO-8, TO-92, Metal Can).

Voltage Reference Replacement Considerations

LT1034CS8-2.5

Voltage Reference FAQ

What is the function of the second reference in the LT1034?

The LT1034 includes a 7V auxiliary reference which is a subsurface zener device intended for less demanding applications compared to the precision band-gap output.

How does the LT1034 perform with unregulated supplies?

The device features low dynamic impedance, making it easy to use directly from unregulated power sources without complex filtering.