ADR540ART-REEL7

Overview

The ADR540ART-REEL7 is a high precision shunt mode voltage reference manufactured by Analog Devices Inc. It provides a nominal output voltage of 4.096 V with an initial accuracy of ±0.2% and a maximum temperature coefficient of 40 ppm/°C. The device operates within a current range of 50 μA to 15 mA and functions in the industrial temperature range of −40°C to +85°C. It is housed in a 3-Lead SOT-23 package.

Feature Summary

• Ultracompact packaging in 3-Lead SOT-23 and SC70 formats for space-critical applications
• Low temperature drift of 40 ppm/°C (Grade B) ensuring stable performance over temperature
• Eliminates the need for external compensation capacitors while remaining stable with any capacitive load
• Includes a trim terminal allowing output voltage adjustment over a ±0.5% range without affecting temperature coefficient

Applications

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

Procurement Notes

Verify the specific grade (A or B) and package option (RT or KS) required for the design, as these determine the temperature coefficient and accuracy specifications. Confirm RoHS compliance status if applicable, indicated by the 'Z' suffix in the part number. Ensure the operating current remains between 50 μA and 15 mA to maintain specified performance levels.

Selection Notes

Select the Grade B variant for applications requiring a maximum temperature coefficient of 40 ppm/°C and ±0.2% initial accuracy. Choose the Grade A variant if a 70 ppm/°C temperature coefficient and ±0.4% accuracy are acceptable. The SOT-23-3 package is suitable for standard surface mount assembly, while SC70 offers a smaller footprint.

Part Context

This component belongs to the ADR520/ADR525/ADR530/ADR540/ADR550 series of high precision shunt voltage references. These devices utilize a band gap concept to produce a stable reference voltage. The series is designed to operate without external capacitors and features low output noise, making them suitable for precision analog circuits where space and power consumption are constrained.

Replacement Considerations

The datasheet notes pin compatibility with the LM4040/LM4050 series. Designers should verify that the replacement device meets the specific temperature coefficient and accuracy requirements of the original design before substitution.