REF43FZ

Overview

The REF43FZ is a low power precision voltage reference providing a stable 2.5 V output, suitable for 8-, 10- and 12-bit data acquisition systems. It features an initial accuracy of 0.06% and a temperature coefficient of 10 ppm/°C. The device operates within a temperature range of -40°C to +85°C and is housed in an 8-pin hermetic DIP package.

Feature Summary

• Provides a stable 2.5 V output independent of supply voltage, load conditions, or ambient temperature variations.
• Utilizes zener-zap trimming for both output voltage and temperature coefficient to ensure tight tolerances.
• Incorporates a unique curvature correction circuit to reduce thermal curvature characteristic of previous bandgap references.

Applications

• Reference level for 8-bit data acquisition systems
• Reference level for 10-bit data acquisition systems
• Reference level for 12-bit data acquisition systems

Procurement Notes

Verify the specific ordering suffix Z indicates a Pb-free part when sourcing replacements. Confirm the Q-8 package designation corresponds to the required 8-pin hermetic DIP form factor. Ensure the component meets the specified -40°C to +85°C operating temperature range for the intended application environment.

Selection Notes

Select this model where a fixed 2.5 V reference with high initial accuracy (0.06%) is required. The 10 ppm/°C temperature coefficient makes it suitable for applications demanding low thermal drift. Consider the hermetic DIP packaging if environmental sealing or specific mounting constraints are necessary compared to plastic or SOIC alternatives.

Part Context

The REF43 series includes variants such as REF43GZ and REF43GP with different accuracy and temperature coefficients. The REF43FZ specifically denotes the 0.06% accuracy version in an 8-pin hermetic DIP package. Other packages include plastic DIP (N-8) and SOIC (R-8), offering flexibility for various board layouts and manufacturing processes.

Replacement Considerations

REF43GZ offers 0.10% accuracy and 25 ppm/°C drift in the same package. REF43GP provides similar electrical characteristics in a plastic DIP package. Verify pin compatibility and thermal performance when substituting these variants.

FAQ

What is the maximum operating temperature for the REF43FZ?

The maximum operating temperature for the REF43FZ is +85°C.

How does the REF43FZ achieve its low thermal drift?

It uses zener-zap trimming of both output voltage and temperature coefficient, along with a unique curvature correction circuit to reduce thermal curvature.