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REF191ES

REF191ES Description

The REF191ES from Analog Devices Inc. is a high-precision, low-power 2.048V fixed-output series voltage reference, designed for applications demanding exceptional accuracy and stability. Housed in an 8-SOIC surface-mount package, this obsolete but reliable component offers a ±0.1% initial tolerance and an ultra-low 5ppm/°C temperature coefficient, ensuring minimal drift over temperature variations. Operating from a 3V to 15V input range, it delivers a stable output with a modest 45µA supply current, making it ideal for battery-powered and energy-sensitive systems.

REF191ES Features

• Precision Output: Fixed 2.048V with ±0.1% tolerance for high-accuracy applications.
• Low Power Consumption: 45µA supply current and 30mA output current capability.
• Excellent Stability: 5ppm/°C tempco ensures minimal performance drift.
• Wide Input Range: Operates from 3V to 15V, accommodating diverse power supplies.
• Surface-Mount Design: 8-SOIC package (MSL 1) for compact PCB integration.
• Low Noise: Ideal for precision analog circuits like ADCs, DACs, and sensors.

REF191ES Applications

The REF191ES excels in systems requiring stable voltage references, such as:

• Data Acquisition Systems: Ensures ADC/DAC accuracy in industrial and medical equipment.
• Portable Electronics: Low power consumption suits battery-operated devices (e.g., handheld meters).
• Precision Instrumentation: Calibration tools, strain gauges, and temperature sensors.
• Automotive & Industrial Controls: Reliable performance in harsh environments.

Conclusion of REF191ES

Though marked obsolete, the REF191ES remains a robust choice for designers needing a high-precision, low-drift voltage reference with low power draw. Its 2.048V output, tight tolerance, and stability make it superior for critical analog systems where alternatives may lack precision or efficiency. Engineers seeking legacy or long-lifecycle solutions will find this component invaluable for maintaining system integrity.