LT1034CZ-1.2#TRPBF

Voltage Reference Overview

The LT1034CZ-1.2#TRPBF is a micropower dual voltage reference from Analog Devices, featuring a precision 1.2V band-gap reference and a 7V auxiliary zener reference. It operates with a quiescent current of 20µA and supports a maximum shunt current of 20mA. The device offers an initial accuracy of 1% and a guaranteed temperature drift of 20ppm/°C. It functions within an input voltage range up to 15V and operates between 0°C and +70°C. The component utilizes a TO-92-3 through-hole package.

Voltage Reference Feature Summary

• Combines a trimmed thin-film band-gap reference with a subsurface zener auxiliary reference in a single package
• Provides low dynamic impedance for stable operation from unregulated power supplies
• Ensures high long-term stability with minimal temperature cycling hysteresis

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) reference sources
• Microprocessor system voltage monitoring circuits
• Low-power instrumentation signal conditioning

Voltage Reference Procurement Notes

Verify the suffix #TRPBF indicates tape-and-reel packaging when sourcing this specific variant. Confirm the manufacturer designation matches Analog Devices Inc. or Linear Technology legacy branding. Ensure the part number corresponds to the 1.2V output version rather than the 2.5V alternative. Cross-reference the datasheet revision history for any recent manufacturing changes.

Voltage Reference Selection Notes

Select this component for applications requiring a compact dual-reference solution with ultra-low power consumption. The TO-92-3 package suits through-hole designs where space constraints are less critical than leaded connection reliability. Consider the 20ppm/°C drift specification against environmental temperature variations. Evaluate the 20µA operating current against total system power budgets.

Voltage Reference Part Context

This part belongs to the LT1034 series of micropower precision regulators. The series integrates a primary band-gap reference with a secondary 7V zener reference. Variants include different output voltages such as 1.2V and 2.5V, and packages including SO-8 and TO-92. The LT1034 is designed for applications demanding high stability without significant power draw.

Voltage Reference FAQ

What is the difference between the primary and auxiliary references?

The primary reference is a trimmed, thin-film band-gap device offering 1% accuracy and 20ppm/°C drift. The auxiliary reference is a 7V subsurface zener device intended for less demanding applications.

Can the LT1034 operate from unregulated supplies?

Yes, the low dynamic impedance of approximately 1Ω allows the device to be used easily from unregulated power supplies.