ADR370BRT-R2

Overview

The ADR370BRT-R2 is a precision, low-power 2.048 V series band gap voltage reference housed in a compact 3-lead SOT-23 package. It delivers an initial accuracy of ±4 mV (±0.2%) and features a maximum temperature coefficient of 50 ppm/°C across the extended industrial range of −40°C to +125°C. The device operates with a supply voltage between 2.3 V and 15 V while consuming a maximum quiescent current of 72 μA. It supports high output sink/source currents of at least ±5 mA, ensuring stable performance in systems requiring wide input variations and minimal power dissipation.

Feature Summary

• Patented temperature drift curvature correction design techniques ensure high stability and accurate output voltage.
• Micropowered architecture sources or sinks up to 5 mA of load current with low dropout characteristics.
• Compact 3-lead SOT-23 package provides a small footprint suitable for space-constrained designs.

Applications

• Battery-powered instrumentation
• Portable medical instruments
• Data acquisition systems
• Industrial process control systems
• Automotive applications

Procurement Notes

Verify the specific ordering suffix R2 against the manufacturer's official documentation to confirm packaging details and branding codes. Ensure compatibility with RoHS compliance requirements if specified by the project constraints. Cross-reference the exact part number with the latest Analog Devices datasheet revision C to validate all electrical specifications and thermal ratings before finalizing procurement decisions.

Selection Notes

Select this component when a precise 2.048 V reference is required in tight spaces with strict power consumption limits. The B-grade accuracy and low temperature coefficient make it suitable for high-precision data acquisition. Consider the wide operating input voltage range and bidirectional current capability when designing circuits that may experience significant supply fluctuations or varying load conditions.

Part Context

This device belongs to the ADR370 family of micropowered voltage references from Analog Devices. It utilizes a silicon band gap concept to generate a stable reference voltage by summing a positive temperature coefficient voltage with the negative temperature coefficient of a forward-biased transistor base-emitter junction. The family includes A and B grades, differentiated primarily by initial accuracy and temperature coefficient specifications.

Replacement Considerations

The ADR370ART-R2 serves as a lower-accuracy alternative within the same package. Verify pinout compatibility and thermal resistance values when substituting. Ensure the replacement meets the specific initial accuracy and temperature drift requirements of the original design.

FAQ

How does the ADR370 achieve its low temperature coefficient?

It employs patented temperature drift curvature correction techniques and precise matching of on-chip components to minimize output voltage variation over temperature changes.

What external components are recommended for optimal performance?

A 4.7 μF capacitor on the input and a 1 μF capacitor on the output are recommended. An additional 0.1 μF capacitor can be added in parallel with the input capacitor for transient response optimization.