REF2025AISDDCR

Overview

The REF2025AISDDCR is a dual-output voltage reference IC from Texas Instruments, providing a primary reference (VREF) and a secondary bias output (VBIAS = VREF/2). It features an initial accuracy of ±0.05% and a maximum temperature drift of 8 ppm/°C across the -40°C to 125°C range. The device operates with a static current of less than 430 μA and supports a minimum input voltage of 2.52 V due to its 10 mV dropout characteristic. It delivers up to 20 mA output current in both sourcing and sinking modes.

Feature Summary

• Dual-output architecture providing VREF and VREF/2 for single-supply bipolar signal biasing
• Corrosion-resistant matte tin plating optimized for Battelle Class III environments
• High precision tracking between outputs within specified temperature ranges
• Low power consumption suitable for battery-operated systems

Applications

• High-precision industrial data acquisition systems
• Analog input/output modules requiring stable bias voltages
• Metering applications with strict environmental durability requirements
• Signal conditioning circuits for bipolar ADC inputs

Procurement Notes

Verify the suffix AISDDCR confirms the matte tin finish and corrosion resistance specifications required for harsh environments. Ensure the SOT-23-5 thin package dimensions match the PCB footprint constraints. Confirm the specific batch documentation aligns with Battelle Class III compliance if mandated by the design specification.

Selection Notes

Select this component when dual outputs are needed to simplify biasing networks in single-supply systems. The matte tin version is essential for applications exposed to corrosive atmospheres where standard finishes may degrade. Consider the low dropout voltage for efficiency in low-voltage battery-powered designs compared to higher dropout alternatives.

Part Context

This part belongs to the REF20xx series of low-drift, low-power voltage references. Unlike the standard REF2025AIDDCR, the AISDDCR variant specifically incorporates matte tin plating to enhance reliability in corrosive conditions. It shares the same electrical performance characteristics but offers improved environmental robustness for industrial deployments.

Replacement Considerations

The REF2025AIDDCR serves as the standard non-corrosion-resistant alternative. Verify that the absence of matte tin plating does not violate environmental durability requirements for the target application.