ADR423ARM-REEL7

Overview

The ADR423ARM-REEL7 is a second-generation XFET voltage reference providing a nominal 3.00 V output in an 8-lead MSOP package. It features low noise of 2.0 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 5 V to 18 V, draws a maximum quiescent current of 500 μA, and supports up to 10 mA load current across an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes patented XFET technology with drift curvature correction for superior accuracy and thermal hysteresis compared to band gap references.
• Offers a dedicated trim terminal allowing output voltage adjustment over a ±0.5% range without compromising temperature performance.
• Provides high output drive capability of 10 mA while maintaining low power consumption suitable for battery-powered applications.

Applications

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

Procurement Notes

Verify the specific electrical grade required, as the ADR423 series includes both A Grade and B Grade options with distinct initial accuracy and temperature coefficient specifications. Confirm that the MSOP package variant matches the design footprint requirements. Ensure the input voltage headroom meets the minimum 2 V differential requirement relative to the 3.00 V output during operation.

Selection Notes

Select this component when low noise and high stability are critical for precision conversion applications. The B grade offers tighter initial accuracy and lower temperature coefficients than the A grade. Consider the MSOP package size if board space is limited, noting it is approximately 30% smaller than the SOIC option while maintaining identical pinout and electrical characteristics.

Part Context

This part belongs to the ADR42x family of ultraprecision voltage references, which also includes the ADR420, ADR421, and ADR425 models. These devices share the same XFET architecture and package options but differ in nominal output voltages ranging from 2.048 V to 5.00 V. The family is designed to replace older buried Zener references with lower power and better noise performance.

Replacement Considerations

ADR423ARZ-REEL7

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, provided low temperature coefficient resistors are used.

Is an output capacitor required for stability?

No, the ADR42x does not require an output capacitor for stability under any load condition. However, a small capacitor can be added to filter noise or improve transient response.