ADR420AR-REEL7

Overview

The ADR420AR-REEL7 is a second-generation XFET voltage reference providing a fixed 2.048 V output in an 8-lead SOIC package. It features low noise of 1.75 μV p-p (0.1 Hz to 10 Hz) and a temperature coefficient of 3 ppm/°C for the B grade. The device operates with a supply voltage range of 4 V to 18 V, draws a maximum quiescent current of 500 μA, and delivers up to 10 mA of load current. It maintains long-term stability of 50 ppm per 1000 hours and functions across an extended industrial temperature range from −40°C to +125°C.

Feature Summary

• Utilizes patented eXtra implanted junction FET (XFET) technology to minimize voltage nonlinearity over temperature changes.
• Includes a dedicated trim terminal allowing output voltage adjustment within a ±0.5% range without degrading other performance metrics.
• Offers superior thermal hysteresis characteristics compared to standard band gap references.

Applications

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

Procurement Notes

Verify the specific suffix 'AR' corresponds to the 8-lead SOIC package variant when sourcing. Confirm that the required electrical grade matches the datasheet specifications, as accuracy and temperature coefficient values differ between A and B grades. Ensure the reel packaging format aligns with automated assembly requirements.

Selection Notes

Select this component for applications requiring high precision and low noise in a compact surface-mount footprint. Consider the B grade if tighter initial accuracy and lower temperature coefficients are necessary. Evaluate the input voltage headroom requirements against the minimum differential voltage specifications at expected load currents.

Part Context

This part belongs to the ADR42x series of ultraprecision voltage references manufactured by Analog Devices Inc. The series includes variants with different fixed output voltages, such as 2.5 V, 3.0 V, and 5.0 V, all sharing the same underlying XFET architecture and pinout compatibility.

Replacement Considerations

ADR421ARZ

FAQ

Can the output voltage be adjusted?

Yes, the TRIM pin allows for output voltage adjustment over a ±0.5% range without compromising temperature coefficient or other performance parameters.

Is an output capacitor required for stability?

No, the ADR42x does not require an output capacitor for stability under any load condition, though one may be added to filter noise.