REF194GSZ-REEL7

Overview

The REF194GSZ-REEL7 is a precision micropower low dropout voltage reference from the Analog Devices REF19x series, featuring a nominal output voltage of 4.5 V. It utilizes patented temperature drift curvature correction and laser-trimmed thin-film resistors to achieve high initial accuracy with a maximum initial error of ±2 mV and a maximum temperature coefficient of 5 ppm/°C. The device operates within an extended industrial temperature range of −40°C to +85°C and supports a maximum supply current of 45 μA, which reduces to 15 μA in sleep mode. It provides a high output current capability of 30 mA and includes short-circuit protection.

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 functionality
• Low dropout voltage design enabling stable regulation from minimal supply headroom
• Integrated short-circuit protection for enhanced operational safety

Applications

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

Procurement Notes

Verify that the component matches the specific electrical grade (G Grade) required for your application's accuracy specifications. Confirm the package type corresponds to the REEL7 suffix designation. Ensure compatibility with the specified operating temperature range and input voltage requirements before finalizing procurement decisions.

Selection Notes

Select this component when precise voltage referencing is required in space-constrained designs utilizing surface-mount technology. The low power consumption makes it suitable for battery-operated systems, while the high output current allows direct driving of moderate loads without additional buffering. Consider the specific accuracy grade needed for your system's tolerance requirements.

Part Context

This part belongs to the REF19x series of precision band gap voltage references manufactured by Analog Devices Inc. The series encompasses various fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 4.5 V, 5.0 V, 3.3 V, and 4.096 V. All variants share common architectural features such as micropower operation, low dropout characteristics, and sleep mode capabilities across different package options.

Replacement Considerations

Other members of the REF19x family may serve as alternatives if different output voltages are acceptable. Verify pinout compatibility and thermal performance when substituting. Ensure the replacement part meets or exceeds the required initial accuracy and temperature coefficient specifications for the target application.