REF191ESZ

Overview

The REF191ESZ is a precision micropower voltage reference from the Analog Devices REF19x series, housed in an 8-lead SOIC package. It provides a nominal output voltage of 2.048 V with an initial accuracy of ±2 mV maximum and a temperature coefficient of 5 ppm/°C maximum. The device operates within a supply voltage range of 3 V to 15 V, drawing a maximum supply current of 45 μA. It features low dropout voltage characteristics, short-circuit protection, and a dedicated sleep mode that reduces current consumption to less than 15 μA.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry and laser trimming for high stability
• Features a dedicated sleep pin to significantly reduce power consumption when inactive
• Includes internal short-circuit protection for enhanced operational safety
• Provides stable output voltage with minimal dropout relative to the supply input

Applications

• Portable instrumentation systems
• Analog-to-digital and digital-to-analog converter circuits
• Smart sensor interfaces
• 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 the package suffix matches the desired footprint. Check for any recent Product Change Notifications regarding manufacturing site updates or material changes before finalizing procurement decisions.

Selection Notes

Select this component when a precise 2.048 V reference is needed with strict micropower constraints. Consider the E grade for superior line and load regulation compared to F or G grades. Ensure the supply voltage remains above the minimum dropout requirement for the expected load current to maintain regulation.

Part Context

This part belongs to the REF19x family of precision band gap voltage references designed for low-power applications. The series offers various fixed output voltages and packaging options, including SOIC, TSSOP, and PDIP. These devices are engineered for industrial and automotive environments requiring high accuracy over extended temperature ranges.

Replacement Considerations

Other members of the REF19x series may serve as alternatives if different output voltages are acceptable. Verify pin compatibility and thermal resistance requirements when substituting packages such as TSSOP or PDIP variants.