ADR525ART-REEL7

Voltage Reference Overview

The ADR525ART-REEL7 is a high precision shunt mode voltage reference with a nominal output of 2.5 V, housed in an ultracompact 3-Lead SOT-23-3 package. It features an initial accuracy of ±0.2% and a maximum temperature coefficient of 40 ppm/°C across the industrial range of −40°C to +85°C. The device operates within a current range of 50 μA to 15 mA and exhibits low output voltage noise of 18 μV p-p from 0.1 Hz to 10 Hz. It includes a trim terminal for adjusting the output voltage over a ±0.5% range without affecting the temperature coefficient.

Voltage Reference Feature Summary

• Ultracompact 3-Lead SOT-23-3 packaging designed for space-critical applications
• Integrated trim terminal allows adjustment of output voltage over a ±0.5% range while maintaining temperature stability
• Stable operation with any capacitive load without requiring external compensation capacitors
• Pin compatible with LM4040/LM4050 devices for direct replacement in existing designs

Voltage Reference Applications

• Portable, battery-powered equipment
• Automotive systems
• Data acquisition systems
• Instrumentation and process control
• Energy measurement

Voltage Reference Procurement Notes

Verify the specific ordering suffix to confirm the package type and reel quantity. The ART suffix indicates the 3-Lead SOT-23-3 package. Ensure the grade matches the required initial accuracy and temperature coefficient specifications. Confirm RoHS compliance status if required by the manufacturing process. Cross-reference the pin configuration to ensure compatibility with the target PCB footprint.

Voltage Reference Selection Notes

Select this component when a precise 2.5 V reference is needed in a minimal footprint. The Grade B variant offers superior initial accuracy and lower temperature drift compared to Grade A. Consider the minimum operating current of 50 μA for low-power battery applications. The trim feature provides flexibility for system-level error correction. Verify that the dynamic output impedance meets the load regulation requirements of the circuit.

Voltage Reference Part Context

This part belongs to the ADR52x series of high precision shunt voltage references from Analog Devices. The series includes variants with outputs ranging from 2.048 V to 5.0 V. All members share similar architectural features, including band gap technology and low noise characteristics. The ADR525 specifically targets applications requiring a standard 2.5 V reference level with high stability.

Voltage Reference Replacement Considerations

The datasheet explicitly states pin compatibility with the LM4040 and LM4050. These can be considered as functional replacements in designs where the form factor and electrical parameters align. Verify that the substitute device meets the specific temperature coefficient and initial accuracy requirements of the original design.