ADR125AUJZ-REEL7

Overview

The ADR125AUJZ-REEL7 is a micropower, high precision series mode band gap voltage reference manufactured by Analog Devices Inc. It provides a nominal output voltage of 5 V with an initial accuracy of ±0.24% for the A grade and ±0.12% for the B grade. The device features a maximum temperature coefficient of 25 ppm/°C (A grade) or 9 ppm/°C (B grade). It operates within an input voltage range of 5.3 V to 18 V and requires only a 300 mV dropout voltage. Quiescent current ranges from 80 μA to 125 μA depending on input voltage. The component supports a maximum sourcing current of 5 mA and sinking current of 2 mA. It is housed in a 6-lead TSOT (UJ-6) package and functions across an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Patented temperature-drift curvature correction technique minimizes nonlinearities in output voltage versus temperature characteristics.
• Low dropout architecture requiring only 300 mV above the nominal output voltage for stable operation.
• Micropower design with low typical operating current suitable for battery-powered applications.
• Integrated sink and source capability allows flexible load interfacing.

Applications

• Battery-powered instrumentation
• Portable medical equipment
• Data acquisition systems
• Automotive electronics

Procurement Notes

Verify the specific grade (A or B) required for your application, as accuracy and temperature coefficient specifications differ between variants. Confirm that the input voltage supply remains within the specified 5.3 V to 18 V range to ensure proper regulation. Ensure the PCB layout accommodates the tiny TSOT (UJ-6) package dimensions during assembly. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a precise 5 V reference is needed in space-constrained designs. The ADR125 is appropriate for applications requiring low quiescent current to extend battery life. Consider the A grade for standard precision needs or the B grade for tighter tolerance requirements. Ensure the system can handle the thermal dissipation associated with the maximum power rating in the TSOT package.

Part Context

This part belongs to the ADR12x family of precision micropower LDO voltage references, which also includes the ADR121 (2.5 V) and ADR127 (1.25 V) variants. All members share similar architectural features, including the patented curvature correction and low dropout performance. The family is designed to offer high accuracy in a compact surface-mount package, making it suitable for modern miniaturized electronic devices.

Replacement Considerations

Direct functional substitutes within the same family include the ADR121AUJZ-REEL7 and ADR127AUJZ-REEL7, though they provide different output voltages. Cross-family replacements should be evaluated based on pin compatibility, output voltage matching, and thermal performance constraints in the TSOT package.

FAQ

What is the minimum input voltage required for the ADR125AUJZ-REEL7?

The minimum input voltage is 5.3 V, which accounts for the nominal 5 V output plus the 300 mV dropout voltage required for stable regulation.

Does the ADR125 support both sourcing and sinking current?

Yes, the device features integrated sink and source capability, supporting up to 5 mA sourcing current and 2 mA sinking current.

How does the ADR125 maintain accuracy over temperature changes?

It utilizes a patented temperature-drift curvature correction technique that minimizes nonlinearities in the output voltage versus temperature characteristics, resulting in a low maximum temperature coefficient.