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Product Detailed Parameters
- Description：IC VOLT REF MICROPWR 2.048V 8DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：-
- Voltage - Output (Min/Fixed)：-
- Voltage - Output (Max)：-
- Current - Output：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The REF191GPZ is a precision micropower voltage reference from the Analog Devices REF19x series, featuring a nominal output voltage of 2.048 V. It utilizes patented temperature drift curvature correction and laser trimming for high stability. The device operates within an extended industrial temperature range of -40°C to +85°C. Key electrical specifications include a maximum initial accuracy of ±2 mV and a maximum temperature coefficient of 5 ppm/°C. It supports a maximum supply current of 45 μA and offers a sleep mode reducing consumption to 15 μA. The component provides a high output current capability of 30 mA with short-circuit protection.
Feature Summary
- Utilizes patented temperature drift curvature correction circuitry combined with laser trimming of thin-film resistors to achieve low temperature coefficients and high initial accuracy.
- Features a dedicated sleep mode pin that allows the output to be turned off, significantly reducing supply current consumption when the device is not in active use.
- Incorporates internal short-circuit protection to safeguard the device during output overload conditions without requiring external limiting components.
Applications
- Portable instrumentation
- Analog-to-digital (ADC) and digital-to-analog (DAC) converters
- Smart sensors
- Solar powered applications
- Loop-current-powered instruments
Procurement Notes
Verify the specific suffix 'G' against the manufacturer's ordering guide to confirm the exact electrical grade and performance tier. Ensure the package type matches the required PCB footprint, as the REF19x series is available in multiple configurations including SOIC and PDIP. Confirm that the application environment remains within the specified -40°C to +85°C operating range for guaranteed specifications.
Selection Notes
Select this component when a stable 2.048 V reference is required with minimal power consumption. The REF191GPZ is suitable for battery-operated systems due to its micropower characteristics and sleep mode functionality. Consider the thermal management requirements if operating near the upper limits of the dropout voltage specifications under heavy load conditions.
Part Context
The REF191GPZ belongs to the broader REF19x family of precision band gap voltage references manufactured by Analog Devices. This series is designed to provide stable reference voltages across various nominal outputs ranging from 2.048 V to 5.00 V. The GPZ designation indicates a specific grade within the REF191 variant, packaged in an 8-lead PDIP configuration.
FAQ
What is the function of Test Pins 1 and 5 on the REF191GPZ?
Test Pins 1 and 5 are factory test points reserved for in-package Zener zap trimming. They should remain unconnected by the user to ensure optimal output accuracy.
How does the REF191GPZ operate in sleep mode?
Sleep mode is enabled by applying a low TTL or CMOS level to the SLEEP pin. This action turns off the output and reduces the supply current to less than 15 μA.
