REF1004I-1.2/2K5

Overview

The REF1004I-1.2/2K5 is a micropower shunt voltage reference manufactured by Texas Instruments, providing a fixed output of 1.235 V. It features an initial accuracy of ±0.3% and a temperature coefficient of 20 ppm/°C. The device operates within a supply current range of 20 µA to 20 mA and functions across a junction temperature range of -40°C to +85°C. It is housed in an 8-pin SOIC (D) package.

Feature Summary

• Two-terminal bandgap reference diode design for high accuracy
• Micropower operation with low quiescent current consumption
• Outstanding temperature characteristics suitable for precision applications

Applications

• Precision measurement systems requiring stable voltage references
• Data acquisition circuits needing accurate shunt references
• Portable instrumentation powered by battery sources

Procurement Notes

Verify the specific ordering suffix /2K5 corresponds to tape and reel packaging when sourcing components. Confirm that the I grade designation aligns with the required industrial temperature range specifications. Ensure compatibility with existing PCB footprints for the SOIC-8 package before finalizing procurement orders.

Selection Notes

Select this component when a fixed 1.235 V reference is required with tight initial accuracy tolerances. Consider the 20 ppm/°C temperature coefficient for environments with significant thermal variations. Evaluate the micropower requirements against the minimum operating current constraints to ensure stable regulation under light load conditions.

Part Context

This part belongs to the REF1004 series of micropower voltage references from Texas Instruments. The series includes variants such as the REF1004-2.5, which provides a 2.5 V output. These devices are designed as two-terminal bandgap references, offering a compact solution for precision analog circuitry compared to three-terminal adjustable regulators.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.