REF1933AIDDCT

Overview

The REF1933AIDDCT is a dual-output voltage reference from Texas Instruments, providing fixed outputs of 2.5 V and 1.25 V (VREF/2). It features an initial accuracy of 0.1% and a temperature coefficient of 25 ppm/C. The device operates within a supply voltage range up to 5.5 V and supports a maximum shunt current of 20 mA. It functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a compact SOT-23-Thin-5 surface-mount case, it is designed for space-constrained applications requiring stable precision references.

Feature Summary

• Dual-output architecture delivering both VREF and VREF/2 simultaneously
• High precision with 0.1% initial accuracy and low drift characteristics
• Low power consumption suitable for battery-operated systems
• Extended industrial temperature range operation

Applications

• Data acquisition systems
• Portable instrumentation
• Process control loops
• Battery-powered measurement devices

Procurement Notes

Verify the specific suffix 'AIDDCT' against the manufacturer's latest datasheet to confirm pinout compatibility and electrical specifications. Ensure the ordering code matches the required package type and tape-and-reel quantity. Cross-reference humidity sensitivity levels and moisture recovery guidelines before assembly to prevent package damage during reflow soldering processes.

Selection Notes

Select this component when a single package must provide two distinct reference voltages without external resistor dividers. The dual-output design simplifies board layout compared to using separate single-output references. Consider the 25 ppm/C drift rate for thermal stability requirements and verify that the 20 mA maximum current meets the load demands of the connected ADC or comparator circuits.

Part Context

This part belongs to the REF19xx series of low-drift, low-power voltage references. The series includes variants with different output voltages such as 2.5 V, 3.0 V, and 4.096 V. All members share similar packaging options and performance profiles, offering a scalable solution for precision analog front-end designs requiring stable voltage sources in small form factors.

Replacement Considerations

Compatible substitutes include other parts from the same REF19xx family, such as the REF1925AIDDCT or REF1941AIDDCT, provided the output voltage matches the system requirement. Verify that alternative components maintain the same SOT-23-Thin-5 footprint and electrical tolerances to ensure direct interchangeability without circuit redesign.