2.5V Precision Low Drift Voltage Reference

ADR381ARTZ-REEL7 – 2.5V Precision Voltage Reference IC – Analog Devices

Optimize your precision circuitry with the ADR381ARTZ-REEL7 voltage reference IC from Analog Devices. This high-accuracy series voltage reference delivers exceptional stability and ultra-low noise, making it ideal for critical measurement applications where consistent voltage regulation is paramount. PCX ensures authentic Analog Devices components with same-day shipping and dedicated technical support.

Key Features

• Fixed 2.5V Output with ±0.24% initial tolerance
• Ultra-Low Noise: 5µVp-p (0.1Hz to 10Hz)
• Minimal Power Consumption: 140µA supply current
• Wide Input Range: 2.8V to 18V operation
• 5mA Output Current capability
• Industrial Temperature Range: -40°C to +85°C
• Compact SOT-23-3 Package for space-constrained designs

Technical Specifications

Part of Analog Devices’ ADR38 series, this surface-mount voltage reference IC features a fixed series topology with 25ppm/°C temperature coefficient. Housed in a TO-236-3/SOT-23-3 package, it offers robust performance in industrial environments. The device maintains stable 2.5V output with just 140µA quiescent current, enabling energy-efficient designs without compromising accuracy.

Typical Applications

• Precision data acquisition systems
• Industrial process control instrumentation
• Portable medical diagnostic equipment
• Battery-powered test and measurement devices
• High-resolution ADC/DAC reference circuits

About Analog Devices

Analog Devices Inc. (ADI) stands at the forefront of high-performance analog and mixed-signal IC technology. With over 50 years of innovation, ADI consistently sets industry benchmarks for precision, reliability, and signal processing excellence. Their voltage reference products are renowned for pushing the boundaries of accuracy in demanding environments.

ADI’s rigorous quality control and extensive validation processes ensure components meet stringent automotive, industrial, and medical standards. Engineers worldwide trust ADI references for mission-critical applications where component failure is not an option, making them a preferred partner for cutting-edge electronic designs.

About Voltage Reference ICs

Voltage references generate stable, precise DC voltages unaffected by temperature fluctuations, load variations, or power supply changes. These specialized ICs serve as foundational components in analog-to-digital conversion, sensor calibration, and power regulation systems, where voltage accuracy directly impacts overall system performance.

High-grade references like the ADR38 series eliminate measurement drift in sensitive instrumentation. Their low-noise characteristics and thermal stability make them indispensable in medical imaging, industrial automation, and scientific equipment where microvolt-level accuracy determines product viability and regulatory compliance.

Packaging Options

Available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® packaging compatible with automated SMT assembly lines. Specify your preferred format during checkout.

Frequently Asked Questions

Q: What is the typical startup time for this voltage reference?
A: The ADR381 achieves stable output within 200µs after power-up, enabling rapid system initialization.

Q: Can this reference operate from a lithium-ion battery?
A: Yes, its 2.8V minimum input voltage supports direct connection to single-cell Li-ion batteries (3.0V-4.2V range).

Q: How does temperature coefficient affect performance?
A: The 25ppm/°C rating ensures output voltage varies less than 0.0025% per °C – critical for outdoor or industrial environments.

Q: Is this suitable for automotive applications?
A: While industrial-grade (-40°C to +85°C), automotive qualification requires specific variants. Contact PCX support for automotive alternatives.

Q: What PCB layout practices optimize performance?
A: Use Kelvin connections, guard rings around sensitive traces, and place decoupling capacitors within 5mm of the V_IN pin. Consult the datasheet for layout guidelines.

Q: Does PCX provide samples for design validation?
A: Yes, request samples through your PCX account manager for prototype testing.

Note: Product images are representational. Refer to datasheet for exact dimensions and schematics.

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