REF195FS-REEL

Overview

The REF195FS-REEL is a precision micropower, low dropout voltage reference from the Analog Devices REF19x series. It provides a fixed nominal output voltage of 5 V with an initial accuracy of ±2 mV maximum and a maximum temperature coefficient of 5 ppm/°C. The device operates within an extended industrial temperature range of −40°C to +85°C. Key electrical specifications include a maximum supply current of 45 μA, a sleep mode current of 15 μA, and a high output current capability of 30 mA. It features short-circuit protection and low line/load regulation.

Feature Summary

• Utilizes patented temperature drift curvature correction circuitry and laser trimming for high accuracy
• Includes a dedicated SLEEP pin to reduce supply current below 15 μA when disabled
• Provides internal short-circuit protection for robust operation under fault conditions

Applications

• Portable instruments
• 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 'F' against official documentation to confirm the exact electrical grade and tolerance class, as the REF19x series offers multiple grades (E, F, G). Confirm package availability, noting that SOIC packages are available for all grades while TSSOP/PDIP may be restricted to lower grades. Ensure compatibility with required operating temperatures and verify test pins remain unconnected during implementation.

Selection Notes

Select this component for designs requiring stable 5 V references with minimal power consumption. The low dropout characteristic allows operation with supply voltages close to the output level. Consider the sleep mode functionality for battery-operated systems where power reduction is critical. Verify that the 30 mA output current meets load requirements without exceeding thermal limits.

Part Context

This part belongs to the REF19x series of precision band gap voltage references manufactured by Analog Devices. The series is designed to deliver stable output voltages from supplies as low as 100 mV above the output voltage. The REF195 variant specifically targets applications needing a precise 5 V reference with high initial accuracy and low temperature drift.

Replacement Considerations

REF195GSZ-REEL7

FAQ

What is the function of Test Pins 1 and 5?

Test Pins 1 and 5 are reserved for in-package Zener zap trimming during manufacturing. Users should leave these pins unconnected as their resistance values vary widely between parts.

How does the device achieve low supply current?

The REF195 consumes less than 45 μA of supply current in normal operation. Supply current can be further reduced to less than 15 μa by applying a low TTL or CMOS level to the SLEEP pin.