REF1004C-1.2

Overview

The REF1004C-1.2 is a micropower shunt voltage reference manufactured by Texas Instruments, designed for precision applications requiring stable output voltages. It provides a fixed output of 1.2 V with 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 reliably across a temperature range of -40°C to +85°C. Available in SOIC-8 packages, it serves as a compact solution for battery-powered instruments and medical equipment.

Feature Summary

• Micropower operation suitable for space-sensitive designs
• High precision with low temperature drift characteristics
• Two-terminal shunt reference configuration

Applications

• Battery-powered instruments
• Medical equipment
• Building security sensors
• Field transmitters
• Calibrators

Procurement Notes

Verify the specific suffix (e.g., C vs I) against the datasheet to confirm accuracy grade and operating temperature range. Ensure the package type matches the PCB footprint requirements. Confirm RoHS compliance status if required by project specifications. Cross-reference ordering information directly with Texas Instruments documentation to avoid discrepancies.

Selection Notes

Select this component when a low-power, high-precision shunt reference is needed for analog signal conditioning or ADC/DAC references. Consider the REF1112 for lower power consumption in smaller packages. Evaluate thermal management needs based on the maximum shunt current rating. Ensure the input voltage exceeds the output voltage by the minimum dropout requirement specified in the datasheet.

Part Context

The REF1004 series complements other micropower components from Texas Instruments, such as the OPA349 operational amplifiers and TLV240x comparators. It is part of a broader family of voltage references designed for power- and space-sensitive applications. The device integrates bandgap technology to provide stable reference voltages without external trimming.

Replacement Considerations

The REF1112 is a documented improved, lower-power solution for designs currently using the REF1004. Verify pinout compatibility and electrical parameter alignment before substitution.