ADR430ARMZ

Overview

The ADR430ARMZ is a series precision voltage reference utilizing XFET technology, providing a fixed output of 2.048 V with an initial accuracy of ±0.15% and a temperature coefficient of 10 ppm/°C. It operates within a supply voltage range of 4.1 V to 18 V, requiring only 2 V of headroom. The device draws 800 µA of quiescent current and supports sourcing up to 30 mA and sinking up to -20 mA. It features ultralow noise (3.5 µV p-p from 0.1 Hz to 10 Hz) and includes a trim terminal for ±5% adjustment. Packaged in an 8-lead MSOP, it functions reliably across the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• XFET architecture minimizes thermal drift curvature and delivers exceptionally low noise performance without requiring external capacitors.
• Capable of sourcing 30 mA and sinking 20 mA while maintaining stability with minimal supply voltage headroom.
• Includes a dedicated trim pin allowing precise output voltage adjustment over a ±5% range without degrading overall performance.

Applications

• Precision data acquisition systems
• High resolution data converters
• Medical instruments
• Industrial process control systems

Procurement Notes

Verify the specific grade (A or B) required for your application, as the base part number may denote different accuracy and temperature coefficient specifications. Confirm the package type matches your PCB footprint requirements. Ensure the input voltage stays within the specified operating range to maintain regulation. Check for any recent product change notices regarding pinout or electrical characteristics before finalizing the design.

Selection Notes

Select this component when low noise and high accuracy are critical for signal integrity in measurement circuits. Consider the A grade for standard industrial applications or the B grade if tighter temperature coefficients are necessary. Evaluate the power dissipation capabilities relative to the expected load current and ambient temperature conditions. Verify that the available supply voltage meets the minimum headroom requirement for proper operation.

Part Context

This device belongs to the ADR43x family of XFET voltage references, which also includes models with outputs of 2.5 V, 3.0 V, 4.096 V, and 5.0 V. All members share similar architectural benefits, including low noise, high accuracy, and low temperature drift. The family is designed to replace traditional buried Zener references by offering comparable performance at lower supply voltages and currents.

Replacement Considerations

ADR430ARZ

FAQ

Does the ADR430ARMZ require an external capacitor for stability?

No, the device does not require an external capacitor for basic operation, though one can be added to the COMP pin to further reduce high-frequency noise.

How does the XFET technology benefit this voltage reference?

XFET technology provides a correction term that is significantly lower than band gap references, resulting in reduced noise and minimized thermal hysteresis.