REF1004I-1.2E4

Overview

The Texas Instruments REF1004I-1.2E4 is a micropower shunt voltage reference providing a fixed 1.2 V output. 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 supports a maximum shunt current of 20 mA. It functions reliably across a temperature range of -40°C to +85°C and is housed in an SOIC-8 surface-mount package.

Feature Summary

• Micropower two-terminal shunt reference design
• High precision with 0.3% initial accuracy
• Low temperature drift of 20 ppm/°C
• Wide operating current range from 20 µA to 20 mA

Applications

• Battery-powered instruments
• Medical equipment
• Field transmitters
• Calibrators

Procurement Notes

Verify the specific suffix E4 for lead-free compliance and RoHS status against the manufacturer's latest documentation. Confirm the package type matches the required PCB footprint, as variations exist within the family. Ensure the ordering code corresponds to the tube packaging format typically associated with this part number variant.

Selection Notes

Select this component when a stable 1.2 V reference is required with high initial accuracy. It is suitable for applications needing low power consumption down to 20 µA. Consider the SOIC-8 package for surface-mount assembly. Verify that the load current requirements fall within the specified 20 µA to 20 mA operating range for proper regulation.

Part Context

This part belongs to the REF1004 series of micropower voltage references from Texas Instruments. It shares architectural similarities with the LT1004 but offers improved accuracy and lower noise characteristics. The series is designed for space-sensitive applications requiring precise voltage referencing in compact packages.

Replacement Considerations

The REF1112 is a documented lower-power alternative in a smaller SOT-23 package. Verify pinout compatibility and thermal performance when substituting. Check if the reduced operating current range of the replacement meets the specific circuit biasing requirements.