REF198GRU

Overview

The REF198GRU 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 4.096 V with a maximum initial accuracy of ±2 mV and a temperature coefficient of 5 ppm/°C. The device operates within an extended industrial temperature range of −40°C to +85°C. Key electrical characteristics include a low supply current of 45 μA maximum, a sleep mode current of 15 μa maximum, and a high output current capability of 30 mA. It features short-circuit protection and low dropout voltage performance.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry and laser trimming for high stability
• Includes a dedicated SLEEP pin for reducing supply current via TTL or CMOS logic levels
• Provides integrated short-circuit protection for enhanced reliability
• Features test pins reserved for factory Zener zap trimming to ensure precise output accuracy

Applications

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

Procurement Notes

Verify the specific suffix RU against the manufacturer's ordering guide to confirm the package type and grade. Ensure compatibility with system requirements regarding the extended industrial temperature range and low dropout voltage specifications. Confirm that the 4.096 V output aligns with the target application's reference needs before finalizing procurement.

Selection Notes

Select this component when a stable 4.096 V reference is required with minimal power consumption. The REF198GRU is suitable for battery-operated systems due to its micropower profile and sleep mode functionality. Consider the 8-lead SOIC package constraints and verify that the load regulation and line regulation meet the precision requirements of the connected analog-to-digital or digital-to-analog converters.

Part Context

The REF198GRU belongs to the REF19x series of precision band gap voltage references manufactured by Analog Devices. This series is designed for applications demanding high accuracy and low power consumption. The REF198 variant specifically targets circuits requiring a 4.096 V reference, commonly used in instrumentation and data acquisition systems where precision and stability are critical.

Replacement Considerations

Consult the official REF19x series datasheet for parametrically similar parts. Verify that any substitute matches the 4.096 V output, 8-lead SOIC package, and electrical grades. Cross-reference tools may assist in identifying alternatives, but direct substitution requires confirmation of pinout and thermal characteristics.

FAQ

What is the function of Test Pins 1 and 5 on the REF198GRU?

Test Pins 1 and 5 are reserved for in-package Zener zap trimming during manufacturing. Users should leave these pins unconnected as their resistance values vary widely between units.

How does the REF198GRU achieve low power consumption?

The device consumes less than 45 μA of supply current under normal operation. It can be further reduced to less than 15 μA by activating the sleep mode via the SLEEP pin using a low TTL or CMOS level.