REF191GP

Overview

The REF191GP is a precision micropower voltage reference from the Analog Devices REF19x series, featuring a nominal output of 2.048 V. It utilizes patented temperature drift curvature correction and laser-trimmed thin-film resistors to achieve high initial accuracy with a maximum temperature coefficient of 5 ppm/°C. The device operates on a single supply ranging from 3 V to 15 V, consuming a maximum supply current of 45 μA. It includes a sleep mode that reduces current consumption to 15 μA and provides short-circuit protection.

Feature Summary

• Patented temperature drift curvature correction circuit combined with laser trimming for high stability
• Micropower operation with low dropout voltage capability
• Integrated sleep mode for significant power reduction
• Built-in short-circuit protection

Applications

• Portable instruments
• ADCs and DACs
• Smart sensors
• Solar powered applications
• Loop-current-powered instruments

Procurement Notes

Verify the specific electrical grade (E, F, or G) required for your application, as performance specifications vary by grade. Confirm package availability, noting that PDIP and TSSOP packages are restricted to the lowest electrical grade. Ensure the ordering suffix matches the desired physical package type for integration into your design.

Selection Notes

Select the REF191GP based on the required initial accuracy and temperature coefficient specifications. Higher grades offer tighter tolerances but may have limited packaging options. Consider the operating temperature range, as extended industrial specs cover -40°C to +85°C while automotive applications may require evaluation up to +125°C. Verify supply voltage compatibility within the 3 V to 15 V range.

Part Context

The REF191GP belongs to the REF19x series of precision band gap voltage references manufactured by Analog Devices. This series is designed for applications requiring stable reference voltages with minimal power consumption. The GP designation indicates a specific package configuration within this family, which also includes variants like REF192 through REF198 offering different nominal output voltages.

Replacement Considerations

Direct replacements within the same series include other REF19x models if a different voltage is acceptable. For pin-compatible alternatives with similar performance, consider checking the manufacturer's current product portfolio for updated revisions or equivalent micropower reference devices.