ADR540ART-R2

Voltage Reference Overview

The ADR540ART-R2 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 ±0.4% (Grade A). The device features a maximum temperature coefficient of 70 ppm/°C over the industrial operating range of −40°C to +85°C. It operates within a current range of 50 μA to 15 mA and exhibits low output voltage noise of 30 μV p-p from 0.1 Hz to 10 Hz. The component is housed in a 3-Lead SOT-23-3 package.

Voltage Reference Feature Summary

• Ultracompact 3-Lead SOT-23-3 package designed for space-critical applications
• Integrated trim terminal allows adjustment of output voltage over a ±0.5% range without affecting temperature coefficient
• Operates stably without requiring an external compensation capacitor
• Low minimum operating current suitable for battery-powered systems

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific grade and package option when ordering. The suffix ART indicates the 3-Lead SOT-23-3 package, while R2 denotes the reel quantity of 250 parts. Confirm that the Grade A specifications meet the required accuracy and temperature coefficient limits for the intended design environment before finalizing procurement.

Voltage Reference Selection Notes

Select this component for designs requiring a precise 4.096 V reference in a minimal footprint. Ensure the bias resistor calculation accommodates the 50 μA minimum operating current at the lowest supply voltage and the 15 mA maximum limit at the highest supply voltage. Consider the Grade A temperature coefficient if tighter thermal stability than Grade B is required.

Voltage Reference Part Context

This part belongs to the ADR520/ADR525/ADR530/ADR540/ADR550 series of high precision shunt voltage references. These devices utilize band gap technology to achieve stable performance across varying temperatures. The series offers multiple fixed output voltages and packaging options, including SC70 and SOT-23-3, to support diverse embedded system requirements.

Voltage Reference Replacement Considerations

The datasheet notes pin compatibility with the LM4040/LM4050 series. Verify electrical parameters such as temperature coefficient and noise against the specific replacement part number to ensure functional equivalence in the target application.