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REF191GS

REF191GS Description

The REF191GS from Analog Devices Inc. is a high-precision, low-power 2.048V fixed-output series voltage reference, designed for applications demanding stable and accurate voltage regulation. With a ±0.5% initial tolerance and a low 25ppm/°C temperature coefficient, this IC ensures exceptional stability across a wide operating temperature range. The device operates from a 3V to 15V input voltage range, drawing a minimal 45µA supply current, making it ideal for battery-powered and energy-efficient systems. Packaged in an 8-pin SOIC tube, the REF191GS is classified as obsolete but remains a reliable choice for legacy designs requiring high-performance voltage references.

REF191GS Features

• Precision Output: Fixed 2.048V with ±0.5% tolerance for high accuracy.
• Low Power Consumption: 45µA supply current extends battery life in portable devices.
• Excellent Temperature Stability: 25ppm/°C drift ensures consistent performance in varying environments.
• Wide Input Range: Operates from 3V to 15V, accommodating diverse power supplies.
• Surface-Mount Design: 8-SOIC package suits compact PCB layouts.
• Low Output Noise: Ideal for sensitive analog circuits like ADCs and DACs.
• Robust Construction: MSL 1 (Unlimited) rating ensures handling flexibility.

REF191GS Applications

The REF191GS excels in precision-critical systems, including:

• Data Acquisition Systems: Provides stable reference voltages for ADCs and sensors.
• Portable Medical Devices: Low power consumption suits wearable health monitors.
• Industrial Control Systems: Reliable performance in harsh environments.
• Battery-Powered Equipment: Energy efficiency extends operational life.
• Test and Measurement Instruments: Ensures accuracy in calibration and signal conditioning.

Conclusion of REF191GS

The REF191GS is a high-accuracy, low-power voltage reference tailored for precision electronics. Its low drift, wide input range, and compact form factor make it a versatile solution for legacy and niche applications. While marked as obsolete, its performance metrics—such as ±0.5% tolerance and 25ppm/°C stability—ensure it remains a competitive option for designers prioritizing reliability in analog systems. Ideal for medical, industrial, and portable devices, the REF191GS delivers consistent performance where voltage precision is paramount.