REF1112AIDBZRG4

Overview

The REF1112AIDBZRG4 is a fixed shunt voltage reference from Texas Instruments, providing a precise output of 1.25V. It features an initial accuracy of ±0.2% and a low temperature coefficient of 10ppm/°C. The device operates within an input voltage range up to 5.5V and supports a maximum shunt current of 5mA. Quiescent current is minimized at 1µA, ensuring efficient power management. It functions reliably across an extended temperature range from -40°C to +125°C. The component is housed in a compact SOT-23-3 package, suitable for surface-mount applications requiring high precision and stability.

Feature Summary

• Delivers a stable 1.25V fixed output with high initial accuracy
• Ultra-low quiescent current consumption for energy efficiency
• Low temperature coefficient ensures minimal drift over thermal variations
• Compact SOT-23-3 package design for space-constrained layouts

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Data acquisition systems requiring stable voltage benchmarks
• Portable battery-powered instrumentation circuits
• Industrial process control signal conditioning

Procurement Notes

Verify the specific suffix 'RG4' corresponds to the required tape-and-reel packaging configuration before ordering. Confirm that the obsolete status does not impact long-term supply chain requirements for your production timeline. Ensure compatibility with existing PCB footprints designated for SOT-23-3 packages. Cross-reference the latest datasheet revision to confirm electrical characteristics match system specifications exactly.

Selection Notes

Choose this component when a fixed 1.25V reference is necessary with stringent accuracy requirements. The low 1µA current draw makes it ideal for battery-operated devices where power conservation is critical. Consider the 10ppm/°C drift specification for environments with significant thermal fluctuations. The SOT-23-3 form factor allows for easy integration into dense circuit boards compared to larger through-hole alternatives.

Part Context

This part belongs to the REF111x series of shunt voltage references designed by Texas Instruments. It complements other fixed-voltage options like the REF1111 and REF1113, which offer different output voltages but share similar performance characteristics. The series is engineered for applications demanding high precision and low power consumption in small form factors.

Replacement Considerations

Direct substitutes include REF1111AIDBZRG4 for 1.25V variants or REF1113AIDBZRG4 for 2.5V outputs within the same family. Verify pinout compatibility and thermal performance when transitioning between series members.