REF198FSZ-REEL

Overview

The REF198FSZ-REEL 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 maximum supply current of 45 μA, a sleep mode current of 15 μA, and a high output current capability of 30 mA.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry and laser trimming for high stability.
• Features low dropout voltage operation requiring minimal headroom above the output voltage.
• Includes a dedicated SLEEP pin that reduces supply current when activated by logic levels.

Applications

• Portable instruments
• ADCs and DACs
• Smart sensors

Procurement Notes

Verify the specific suffix 'FSZ' against the manufacturer's ordering guide to confirm the tape and reel packaging format and grade. Ensure the component matches the required electrical specifications for the target application environment. Cross-reference the datasheet revision to confirm all performance parameters are current.

Selection Notes

Select this component for applications requiring a stable 4.096 V reference with low power consumption. Consider the 8-lead SOIC package constraints and the need for external bypassing capacitors as specified in the general description. Evaluate the thermal resistance and power dissipation limits if operating near maximum load currents.

Part Context

This part belongs to the REF19x series of precision band gap voltage references. The series offers various fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.5 V, 5.0 V, and 4.096 V. All variants share similar architectural features such as micropower operation and low dropout capabilities.

Replacement Considerations

Direct replacements within the same family include other REF19x variants with different output voltages or grades. Verify compatibility regarding package type and electrical performance before substitution.

FAQ

What is the function of Test Pins 1 and 5?

Test Pins 1 and 5 are factory test points reserved for in-package Zener zap trimming. They should be left unconnected by the user to ensure optimal accuracy.

How does the device operate in sleep mode?

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