REF198G

Overview

The REF198G is a precision micropower voltage reference IC from Analog Devices, delivering a fixed 5.0V output. It features an initial accuracy of 0.1% and a maximum temperature coefficient of 5 ppm/°C. The device operates with a low supply current of 45 µA and supports a load current up to 30 mA. It functions within an input voltage range of 4.75V to 15V and maintains stability across a temperature range of -40°C to +85°C.

Feature Summary

• Provides high-precision fixed voltage output with tight initial tolerance
• Ensures thermal stability through low temperature coefficient characteristics
• Enables extended battery life via ultra-low quiescent current consumption
• Includes internal short-circuit protection for robust operation

Applications

• Portable instrumentation systems requiring precise analog references
• Analog-to-digital and digital-to-analog converter signal conditioning
• Smart sensor interfaces demanding stable bias voltages
• Solar-powered applications optimizing energy efficiency
• Loop-powered industrial instrumentation circuits

Procurement Notes

Verify the specific suffix 'G' against official Analog Devices documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required operating temperatures and load conditions before integration. Cross-reference datasheet revisions to confirm pinout consistency and electrical parameter limits for your specific design constraints.

Selection Notes

Select this component when a fixed 5V reference is required with minimal power consumption. Consider the 0.1% initial accuracy for high-resolution measurement systems. Evaluate the 45 µA supply current against battery life requirements. Verify that the 30 mA output capability meets the load drive needs of downstream circuitry without external buffering.

Part Context

The REF198G belongs to the REF19x series of precision micropower voltage references. This family is designed for applications where low power consumption and high accuracy are critical. The series offers various fixed output voltages and packaging options to suit different system constraints while maintaining consistent performance characteristics across temperature ranges.

Replacement Considerations

Direct replacements include other members of the REF19x series with compatible output voltages and accuracies. Verify pinout compatibility and thermal performance when substituting. Consult official Analog Devices documentation for approved cross-references and ensure all electrical parameters meet or exceed original design requirements.