REF194GS-REEL

Overview

The REF194GS-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 and low temperature coefficients. The device operates with a maximum supply current of 45 μA and supports up to 30 mA output current. It includes short-circuit protection and a sleep mode reducing current to 15 μA. Available in an 8-lead SOIC package, it functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Patented temperature drift curvature correction circuit combined with laser trimming for high stability
• Micropower operation with low supply current consumption and dedicated sleep mode
• Low dropout voltage design allowing stable output from supplies close to the output level
• Integrated short-circuit protection for enhanced reliability

Applications

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

Procurement Notes

Verify that the ordering suffix REEL corresponds to tape and reel packaging as specified by the manufacturer. Confirm the electrical grade (E or G) matches the required performance specifications for line regulation, load regulation, and temperature coefficient. Ensure the 8-lead SOIC package dimensions align with the target PCB footprint. Check for RoHS compliance status if environmental regulations apply to the end product.

Selection Notes

Select this component when a fixed 4.50 V reference is required with micropower constraints. Consider the E grade for tighter initial accuracy and lower temperature coefficients compared to the G grade. Evaluate the low dropout characteristic against the minimum available supply voltage in the system. Verify that the 30 mA output current capability meets the load requirements without exceeding power dissipation limits.

Part Context

The REF194GS-REEL belongs to the REF19x series of precision band gap voltage references manufactured by Analog Devices Inc. This series is designed for applications requiring stable voltage references with minimal power consumption. The GS suffix indicates the 8-lead SOIC package variant, while REEL denotes the specific packaging format for automated assembly processes.

Replacement Considerations

Consult the REF19x series datasheet for alternative part numbers offering different nominal voltages or package types. Verify compatibility regarding pinout configuration, specifically the SLEEP pin functionality and test pin placements, before substituting with other devices in the family.