REF1933AIDDCR

Overview

The REF1933AIDDCR is a dual-output voltage reference from Texas Instruments, providing fixed outputs of VREF and VREF/2. It operates within an input voltage range of 3.5V to 6V and delivers a maximum output current of 20mA. The device features low drift characteristics with a temperature coefficient of 8ppm/°C and high initial accuracy of ±0.05%. Designed for surface-mount applications, it utilizes a 5-pin SOT-23-Thin package and functions reliably across a wide temperature range from -40°C to +125°C.

Feature Summary

• Dual-output architecture generating both VREF and VREF/2 simultaneously
• Low-drift performance ensuring stable operation over temperature variations
• High precision with tight initial accuracy tolerances
• Compact surface-mount packaging suitable for space-constrained designs

Applications

• Interleaved analog-to-digital converter (ADC) systems
• Portable instrumentation requiring precise voltage standards
• Medical equipment utilizing low-power signal conditioning
• Data acquisition systems needing stable reference sources

Procurement Notes

Verify the specific suffix 'AIDDCR' matches the required package type and output configuration. Confirm that the dual-output requirement aligns with system design needs, as single-output variants exist within the same family. Ensure compatibility with the specified input voltage range and thermal operating conditions before finalizing procurement orders.

Selection Notes

Select this component when simultaneous VREF and VREF/2 generation is required to reduce external resistor networks. Consider its low power consumption and small footprint for battery-operated or portable devices. Evaluate the trade-off between the 8ppm/°C drift and higher precision alternatives if extreme stability is critical for the application.

Part Context

This part belongs to the REF19xx series of low-drift, low-power voltage references. It complements other TI offerings like the REF2033 and REF33xx families by providing dual outputs in a compact form factor. The series targets applications demanding high accuracy and minimal power usage in industrial and medical environments.

Replacement Considerations

The REF1933AIDDCT serves as a tape-and-reel alternative to the cut-tape DDCR variant. Other members of the REF19xx family may offer different voltage options but maintain similar electrical characteristics.