ADR381ARTZ-REEL7

Product Overview

ADR381ARTZ-REEL7 is an Analog Devices Inc. series voltage reference IC that provides a fixed 2.5 V output. The device accepts an input voltage range of 2.8 V to 18 V and has a specified 5 mA output current for use as a reference node in compact analog signal chains. Its tolerance is ±0.24%, with a temperature coefficient of 25 ppm/°C and 0.1 Hz to 10 Hz noise of 5 µVp-p. The supply current is 140 µA, and the device operates from -40°C to 85°C in a surface-mount TO-236-3, SC-59, SOT-23-3 package.

Key Features

• Fixed 2.5 V output from a series voltage reference architecture.
• Output tolerance of ±0.24% and temperature coefficient of 25 ppm/°C.
• 0.1 Hz to 10 Hz noise specification of 5 µVp-p.
• Input voltage range of 2.8 V to 18 V with 140 µA supply current.
• Output current specification of 5 mA.
• Surface-mount SOT-23-3 package, also identified as TO-236-3 and SC-59.
• Operating temperature range of -40°C to 85°C.

Applications

• Providing a stable 2.5 V reference node in analog-to-digital converter circuits where measurement accuracy depends on reference stability.
• Serving as a fixed voltage reference in sensor signal conditioning circuits where analog outputs are scaled against a stable reference.
• Establishing a precision reference point in compact instrumentation boards using surface-mount reference components.

Design & Procurement Notes

Because this is a fixed 2.5 V series reference, designers should confirm that the available input voltage remains within the 2.8 V to 18 V range and that the load current is checked against the 5 mA output current specification. The 140 µA supply current should be included in power budgets, while the ±0.24% tolerance, 25 ppm/°C coefficient, and 5 µVp-p low-frequency noise should be considered when evaluating overall reference accuracy. The SOT-23-3 surface-mount package supports compact layouts, but the final board environment should be checked against the -40°C to 85°C operating temperature range. Procurement checks should verify that the selected device package, output voltage, and tolerance match the schematic footprint and reference stage requirements.