ADR423AR

Overview

The ADR423AR is a precision voltage reference from Analog Devices, delivering a nominal output of 3.00 V. It utilizes second-generation XFET technology to achieve low noise and high accuracy. The device operates within an input voltage range of 5 V to 18 V and draws a maximum quiescent current of 0.5 mA. It provides a maximum load current of 10 mA with excellent line and load regulation. The unit is specified over an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes eXtra implanted junction FET (XFET) architecture for superior accuracy and thermal hysteresis compared to band gap references.
• Features patented temperature drift curvature correction to minimize nonlinearity of the voltage change with temperature.
• Includes a trim terminal allowing output voltage adjustment over a ±0.5% range without compromising other performance characteristics.

Applications

• Precision data acquisition systems
• High resolution converters
• Optical network control circuits

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and reel specifications. Ensure the operating environment remains within the rated temperature limits. Confirm that input voltage headroom requirements are met for the selected load conditions. Check for any specific handling precautions regarding electrostatic discharge during installation.

Selection Notes

Select this component when a stable 3.00 V reference is required for high-precision applications. Consider the XFET technology benefits for low noise environments. Evaluate the need for the trim pin if system-level calibration is necessary. Ensure the supply voltage meets the minimum headroom requirement relative to the output voltage.

Part Context

This part belongs to the ADR42x series of ultraprecision voltage references. The series includes variants with different nominal outputs such as 2.048 V, 2.500 V, and 5.00 V. All members share the same core XFET technology and package options, offering consistent performance characteristics across the family.

Replacement Considerations

Direct substitutes include other parts within the ADR42x series or equivalent XFET-based references from Analog Devices. Verify pin compatibility and electrical specifications before substitution.

FAQ

Can the output voltage be adjusted?

Yes, the TRIM pin allows for output voltage adjustment over a ±0.5% range without affecting the temperature coefficient.

What is the minimum input voltage required?

The minimum operating input voltage is 5 V, requiring at least 2 V of headroom above the output voltage.