REF1941AIDDCR

Overview

The REF1941AIDDCR is a precision series voltage reference from Texas Instruments, housed in a SOT-23-THIN (TSOT-23-5) surface-mount package. It provides a fixed output voltage of 4.096 V with an initial accuracy of ±0.1%. The device operates within an extended temperature range of -40°C to +125°C and features a low temperature coefficient of 25 ppm/°C. It supports a maximum shunt current of 20 mA and draws a supply current of 460 µA. The input voltage range spans from 4.116 V to 5.5 V.

Feature Summary

• Dual-output architecture providing both full reference voltage and half-reference voltage outputs
• Low-noise performance with specified peak-to-peak noise characteristics in the 0.1 Hz to 10 Hz frequency band
• Compact physical footprint utilizing the thin SOT-23-5 package for space-constrained designs

Applications

• Data acquisition systems requiring stable reference voltages
• Industrial process control instrumentation
• Medical equipment power management circuits
• Portable battery-powered test instruments

Procurement Notes

Verify the specific suffix 'AIDDCR' corresponds to the tape-and-reel packaging format intended for automated assembly processes. Confirm that the thermal pad requirements for the TSOT-23-5 package are addressed in the PCB layout design. Ensure compliance with RoHS directives and check moisture sensitivity level classifications for proper storage handling procedures before soldering.

Selection Notes

Select this component when a precise 4.096 V output is required alongside a derived 2.048 V rail for dual-supply or differential signaling applications. Consider the 25 ppm/°C drift specification against environmental temperature variations. Evaluate the 460 µA quiescent current consumption relative to total system power budgets compared to lower-power alternatives like the REF11xx series.

Part Context

This part belongs to the REF19xx family of dual-output voltage references designed for high-precision analog signal chains. The family includes variants with different output voltages such as 1.25 V, 2.5 V, and 3.3 V, all sharing similar low-drift and low-power characteristics. These devices are commonly used in mixed-signal environments where noise immunity and long-term stability are critical for maintaining measurement integrity.

Replacement Considerations

The REF2041AIDDCT offers a tighter initial accuracy of ±0.05% but maintains a similar form factor. For applications requiring lower power consumption, the REF1112 series provides a single-output alternative in a smaller SOT-23-3 package. Verify pinout compatibility and thermal performance when substituting with other manufacturers' dual-output references.