ADR127AUJZ-REEL7

Overview

The ADR127AUJZ-REEL7 is a micropower, high precision series mode band gap voltage reference manufactured by Analog Devices Inc. It provides a nominal output voltage of 1.25 V with an initial accuracy of ±0.24% (A Grade) and a maximum temperature coefficient of 25 ppm/°C over the extended industrial temperature range of −40°C to +125°C. The device features a low dropout characteristic requiring only 1.45 V above the output voltage for stable operation, supporting an input voltage range from 2.7 V to 18 V. It delivers a maximum source current of +5 mA and a sink current of −2 mA while maintaining a typical operating current of 85 μA. The component is housed in a compact 6-Lead TSOT (UJ-6) surface-mount package.

Feature Summary

• Patented temperature-drift curvature correction technique minimizes nonlinearities in output voltage versus temperature characteristics.
• Low dropout architecture enables stable regulation with minimal headroom requirements relative to the nominal output voltage.
• Micropower design achieves low quiescent current consumption suitable for battery-powered applications.
• Integrated source and sink capability allows flexible load driving without external buffering components.

Applications

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

Procurement Notes

Verify the specific grade (A or B) and packaging option (Reel vs. Cut Tape) against project requirements, as performance metrics such as temperature coefficient vary between grades. Confirm RoHS compliance status and ensure the ordering suffix matches the desired reel quantity. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and supply chain integrity before procurement.

Selection Notes

Select this component when a low voltage reference is required with strict power budget constraints. The ADR127 variant is appropriate for inputs starting at 2.7 V, whereas other family members require higher minimums. Evaluate thermal dissipation capabilities within the TSOT package if operating near maximum load currents or elevated ambient temperatures. Ensure input voltage remains within the specified 2.7 V to 18 V range to maintain regulation stability.

Part Context

This component belongs to the ADR12x family of precision voltage references, which includes the ADR121 (2.5 V) and ADR125 (5.0 V) variants. All members share the same 6-Lead TSOT package and architectural features, differing primarily in their nominal output voltages and minimum dropout requirements. The family utilizes a common band gap reference core with curvature correction technology to ensure high accuracy across the industrial temperature range.

Replacement Considerations

Direct functional substitutes within the same package include the ADR121AUJZ-REEL7 and ADR125AUJZ-REEL7, provided the circuit design accommodates their respective 2.5 V and 5.0 V output levels. Other ADR12x family members offer different accuracy grades (B Grade) with improved temperature coefficients but may not match the exact electrical specifications of the A Grade part.