REF192FS

Overview

The REF192FS is a precision micropower voltage reference from the Analog Devices REF19x series, featuring a nominal output of 2.5 V with an initial accuracy of ±2 mV maximum. It operates within a supply voltage range of 3 V to 15 V and delivers up to 30 mA of output current while consuming a maximum of 45 μA in active mode. The device incorporates patented temperature drift curvature correction and laser trimming for stability, achieving a maximum temperature coefficient of 5 ppm/°C over the industrial range of −40°C to +85°C. It includes short-circuit protection and a sleep mode reducing current to 15 μA.

Feature Summary

• Patented temperature drift curvature correction circuit combined with laser-trimmed thin-film resistors ensures high initial accuracy and low temperature coefficient.
• Micropower design provides stable output with low dropout voltage and minimal supply current consumption.
• Integrated sleep mode functionality allows significant power reduction when enabled by logic-level signals.
• Built-in short-circuit protection safeguards the device during output fault conditions.

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 FS against official documentation to confirm package type and grade availability. Ensure compatibility with required operating temperatures and load conditions before integration. Cross-reference ordering guides for correct packaging options such as SOIC or TSSOP.

Selection Notes

Select this component for applications requiring high precision with low power consumption. Consider the 2.5 V output and 30 mA capability for driving ADCs or DACs. Evaluate thermal performance and dropout requirements relative to the system supply voltage.

Part Context

Part of the REF19x series of precision band gap voltage references designed for micropower applications. The series utilizes proprietary DigiTrim technology for enhanced stability and features extended industrial temperature specifications suitable for demanding environments.

Replacement Considerations

Consult official substitution lists for equivalent parts with matching voltage, accuracy, and package constraints.

FAQ

What is the purpose of Test Pins 1 and 5?

Test Pins 1 and 5 are reserved for factory Zener zap trimming to achieve high accuracy. Users should leave these pins unconnected.

How does the sleep mode function?

Sleep mode is enabled by applying a low TTL or CMOS level to the SLEEP pin, turning off the output and reducing supply current to less than 15 μA.