ADR540BKS-R2

Overview

The ADR540BKS-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 ±0.2% and a maximum temperature coefficient of 40 ppm/°C. The device operates within an industrial temperature range of −40°C to +85°C and requires an operating current between 50 μA and 15 mA. It features ultralow output noise of 30 μV p-p in the 0.1 Hz to 10 Hz band and does not require an external compensation capacitor for stability.

Feature Summary

• Ultracompact packaging in SC70 and SOT-23-3 form factors designed for space-critical applications
• Pin compatible with LM4040/LM4050 devices for direct replacement
• Integrated trim terminal allows adjustment of output voltage 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 ordering suffix R2 indicates a reel quantity of 250 parts per the manufacturer's ordering guide. Confirm RoHS compliance status if required by environmental regulations. Ensure the SC70 package option matches the PCB footprint design constraints. Validate that the 4.096 V output aligns with system requirements before finalizing procurement orders.

Selection Notes

Select this component when a precise 4.096 V reference is needed in a minimal footprint. The B grade offers superior accuracy compared to the A grade. Consider stacking multiple units if higher voltages are required. Verify that the bias resistor calculation accommodates the minimum 50 μA operating current across the full supply voltage range.

Part Context

This part belongs to the ADR520/ADR525/ADR530/ADR540/ADR550 series of high precision shunt voltage references. These devices utilize a band gap concept to produce stable references suitable for data acquisition components. The series covers output voltages from 2.048 V to 5.0 V, offering flexibility for various analog circuit designs requiring low drift and low noise performance.

Replacement Considerations

LM4040 and LM4050 are pin-compatible alternatives mentioned in the datasheet.