REF194GSZ-REEL

Overview

The REF194GSZ-REEL is a precision micropower low dropout voltage reference from the Analog Devices REF19x series, featuring a nominal output voltage of 4.50 V. It utilizes patented temperature drift curvature correction and laser-trimmed thin-film resistors to achieve high initial accuracy with a maximum temperature coefficient of 5 ppm/°C. The device provides a high output current of 30 mA while consuming a maximum supply current of 45 μA, which reduces to 15 μA in sleep mode. It operates within an extended industrial temperature range of -40°C to +85°C and includes short-circuit protection.

Feature Summary

• Patented temperature drift curvature correction circuit combined with laser trimming for high stability
• Micropower operation with low dropout voltage capability
• Integrated sleep mode functionality for reduced power consumption
• Built-in short-circuit protection

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and reel specifications. Confirm the electrical grade (E or G) aligns with the necessary line regulation and load regulation tolerances for the design. Ensure compatibility with the intended operating temperature range and input voltage constraints before finalizing procurement.

Selection Notes

Select this component when a stable 4.50 V reference is required with minimal quiescent current draw. Consider the E grade for tighter initial accuracy and lower temperature coefficients compared to the G grade. Evaluate the low dropout characteristics against the minimum available supply voltage to ensure proper regulation under all load conditions.

Part Context

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

Replacement Considerations

Other members of the REF19x family, such as REF192GSZ-REEL or REF195GSZ-REEL, may serve as alternatives if different nominal output voltages are acceptable. Verify pinout compatibility and thermal resistance requirements when substituting.