ADR430BR

Overview

The ADR430BR is a precision voltage reference from the ADR43x series, utilizing XFET technology to minimize temperature drift nonlinearity. It provides a nominal output of 2.048 V with B Grade initial accuracy of ±1 mV (±0.05%) and a maximum temperature coefficient of 3 ppm/°C over the -40°C to +125°C range. The device operates within an input voltage range of 4.1 V to 18 V, requiring only 2 V of headroom. It features ultralow noise of 3.5 µV p-p (0.1 Hz to 10 Hz) and supports high output currents of +30 mA source and -20 mA sink without external capacitors.

Feature Summary

• XFET technology minimizes voltage change versus temperature nonlinearity for superior stability.
• Capable of sourcing up to 30 mA and sinking up to 20 mA output current.
• Includes a trim terminal allowing output voltage adjustment over a 0.5% range.
• Operates with low supply current and requires no external bypass capacitor.

Applications

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

Procurement Notes

Verify the specific package variant against design requirements, as the ADR430BR designation may correspond to SOIC or MSOP configurations depending on the suffix. Confirm that the B Grade specifications meet the system's accuracy needs. Ensure the input voltage remains within the 4.1 V to 18 V operating range to maintain regulation. Check for availability constraints associated with the specific manufacturing lot.

Selection Notes

Select this component when low noise and high accuracy are critical for signal integrity in data conversion stages. The B Grade offers tighter tolerance than the A Grade. Consider the thermal resistance values if power dissipation is significant at higher load currents. Verify compatibility with the system's supply voltage headroom requirements.

Part Context

This part belongs to the ADR43x family of ultralow noise XFET voltage references. The series includes variants with different nominal outputs such as 2.5 V, 3 V, 4.096 V, 5 V, and 4.5 V. All members share similar performance characteristics regarding noise, drift, and current capability, differing primarily in their factory-trimmed output voltage levels.

Replacement Considerations

ADR430ARZ

FAQ

Does the ADR430BR require an external capacitor for stability?

No external capacitor is required for circuit stability, though a small capacitor may be used to improve noise suppression.

What is the purpose of the COMP pin?

The COMP pin allows connection of an external RC network to overcompensate the internal op amp, reducing noise peaking caused by large capacitive loads.