REF198FS

Overview

The Analog Devices REF198FS is a precision micropower voltage reference from the REF19x series, providing a nominal output of 4.096 V. It features a maximum temperature coefficient of 5 ppm/°C and an initial accuracy of ±2 mV. The device operates with a low supply current of 45 μA and includes a sleep mode reducing consumption to 15 μa. It offers high output current capability of 30 mA and low dropout voltage performance. Electrical specifications are defined over an extended industrial temperature range of −40°C to +85°C.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry for enhanced stability
• Incorporates laser trimming of thin-film resistors to achieve high initial accuracy
• Provides integrated short-circuit protection for robust operation
• Features a dedicated sleep pin for logic-controlled power reduction

Applications

• Portable instruments requiring low power consumption
• Analog-to-digital converter (ADC) and digital-to-analog converter (DAC) references
• Smart sensor systems
• Solar powered applications
• Loop-current-powered instruments

Procurement Notes

Verify the specific suffix FS against the official Analog Devices ordering guide to confirm package type and electrical grade availability. Ensure compatibility with the required operating temperature range and verify that test pins remain unconnected during implementation to maintain specified accuracy levels.

Selection Notes

Select this component when a stable 4.096 V reference is needed with minimal quiescent current. Consider the low dropout characteristic for battery-operated designs where supply voltage may approach the output level. Evaluate the sleep mode functionality if power conservation during idle periods is critical for the system architecture.

Part Context

The REF198FS belongs to the REF19x series of precision band gap voltage references manufactured by Analog Devices. This family is characterized by micropower operation and low dropout voltage capabilities. The series utilizes advanced trimming techniques to deliver high precision across various nominal output voltages, catering to demanding analog signal processing applications.

Replacement Considerations

Consult the official Analog Devices REF19x series datasheet for confirmed substitute part numbers within the same family or equivalent products from other manufacturers. Verify pinout compatibility and electrical parameter alignment before substitution.