ADR1581ARTZ-REEL7

Overview

The ADR1581ARTZ-REEL7 is a micropower, precision shunt voltage reference manufactured by Analog Devices Inc. It provides a stable 1.25 V output with an initial accuracy of ±0.12% and a maximum temperature drift of 100 ppm/°C over the industrial range of −40°C to +85°C. The device operates within a wide current range from 60 μA to 10 mA and features a dynamic output impedance of 0.5 Ω maximum. Packaged in a compact SOT-23-3 surface-mount format, it delivers low noise performance suitable for high-precision applications.

Feature Summary

• Utilizes proprietary curvature correction techniques to minimize nonlinearities in voltage output temperature characteristics.
• Maintains stability with any value of capacitive load without oscillation risks.
• Features high electrostatic discharge (ESD) protection ratings of 4 kV human body model and 400 V machine model.

Applications

• Portable, battery-powered equipment
• Cellular phones, notebook computers, PDAs, GPSs, and DMMs
• Computer workstations
• Smart industrial transmitters
• PCMCIA cards

Procurement Notes

Verify the specific grade suffix (ARTZ vs BRTZ) against design requirements, as the ARTZ variant specifies a 100 ppm/°C temperature coefficient compared to the 50 ppm/°C of the B-grade. Confirm that the SOT-23-3 package dimensions align with the PCB footprint. Ensure the input current remains within the 60 μA to 10 mA operational window to maintain specified accuracy and stability parameters.

Selection Notes

Select this component when a low-cost, space-constrained shunt reference is required for 3 V or 5 V systems. The wide operating current range allows versatility in both micropower and higher current applications. Consider the 100 ppm/°C drift specification for environments where extreme thermal stability is not the primary constraint, balancing cost against performance needs.

Part Context

This part belongs to the ADR1581 series of precision bandgap references. It serves as a cost-effective alternative to higher-priced precision references while maintaining robust performance in standard industrial temperature ranges. The device is designed to replace older Zener-based references in applications requiring improved temperature stability and lower noise profiles.

Replacement Considerations

ADR1581BRTZ-REEL7 offers tighter temperature drift specifications (50 ppm/°C) for enhanced thermal stability.

FAQ

Is the ADR1581 stable with capacitive loads?

Yes, the ADR1581 is stable with any value of capacitive load connected directly to its output.

What is the minimum operating current for the ADR1581?

The minimum operating current is 60 μA across the specified temperature range.