REF198GRUZ

Overview

The REF198GRUZ is a precision micropower voltage reference from the Analog Devices REF19x series, providing a fixed nominal output of 4.096 V. It operates with a supply voltage range of 5.2 V to 15 V and consumes a maximum supply current of 45 μA. The device features a low dropout voltage and includes a sleep mode that reduces supply current to less than 15 μA when activated via the SLEEP pin. It offers high initial accuracy with a maximum drift of ±2 mV and maintains a temperature coefficient of 5 ppm/°C over the industrial temperature range of −40°C to +85°C.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry combined with laser trimming for high stability.
• Incorporates short-circuit protection and low dropout voltage characteristics for efficient power management.
• Features a dedicated sleep mode pin allowing significant reduction in supply current during inactive periods.

Applications

• Portable instruments
• Analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
• Smart sensors
• Solar powered applications

Procurement Notes

Verify the specific electrical grade and package suffix against the manufacturer's ordering guide to ensure compatibility with design requirements. Confirm that the component meets RoHS3 compliance standards if required by the target application. Ensure proper handling procedures are followed due to the sensitivity of the internal Zener zapping trim points on Test Pins 1 and 5.

Selection Notes

Select this component for designs requiring a stable 4.096 V reference with minimal quiescent current consumption. Consider the REF19x series for applications needing low dropout performance and integrated sleep functionality. Evaluate the thermal resistance and power dissipation capabilities relative to the expected load current and ambient operating conditions.

Part Context

The REF198GRUZ belongs to the REF19x family of precision band gap voltage references manufactured by Analog Devices Inc. This series is characterized by its use of thin-film resistors and advanced curvature correction techniques to achieve superior temperature stability. The GRUZ suffix indicates an 8-lead TSSOP package variant within the broader product line.

Replacement Considerations

Consult the official REF19x Series Ordering Guide for verified substitute part numbers or alternative grades within the same family. Cross-reference specifications such as output voltage, tolerance, and package dimensions before implementing any replacement.

FAQ

How is the sleep mode activated on the REF198GRUZ?

Sleep mode is enabled by applying a low TTL or CMOS level to the SLEEP pin, which turns off the output and reduces the supply current to less than 15 μA.

What is the recommended connection for Test Pins 1 and 5?

Test Pins 1 and 5 should be left unconnected. They are factory test points reserved for in-package Zener zap trimming and vary widely in resistance value between units.