XTR112U/2K5

Sensor And Detector Interfaces Overview

The XTR112U/2K5 is a monolithic two-wire current transmitter manufactured by Texas Instruments, housed in an SO-14 surface-mount package. It operates on loop supply voltages ranging from 7.5V to 36V and provides a precision 4mA to 20mA output signal. The device integrates two matched 250μA current sources for RTD or bridge excitation, an instrumentation amplifier, and linearization circuitry. Key electrical specifications include a low offset drift of 0.4μV/°C, high power supply rejection of 110dB minimum, and common-mode rejection of 86dB minimum. It supports industrial temperature ranges from -40°C to +85°C.

Sensor And Detector Interfaces Feature Summary

• Integrates complete current excitation, instrumentation amplifier, and linearization circuitry on a single chip.
• Provides versatile second-order correction for RTD sensors to significantly improve linearity.
• Features low unadjusted error allowing use without adjustment in many applications.
• Supports both two-wire and three-wire RTD operation with remote sensor connections.

Sensor And Detector Interfaces Applications

• Industrial process control systems
• Factory automation monitoring
• SCADA remote data acquisition networks
• Remote temperature and pressure transducers

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix /2K5 corresponds to the tape and reel packaging configuration containing 2500 devices per reel. Confirm that the component meets RoHS3 compliance standards and check the moisture sensitivity level (MSL) requirements for proper handling during assembly. Ensure the selected variant matches the required pinout and thermal characteristics for the target application environment.

Sensor And Detector Interfaces Selection Notes

Select the XTR112U/2K5 when two 250μA excitation currents are required for high-impedance platinum RTDs. Choose this model over the XTR114 if higher excitation current is needed for specific bridge configurations. Consider the SO-14 package dimensions and the need for an external transistor for optimal thermal performance at higher loop voltages.

Sensor And Detector Interfaces Part Context

This component belongs to the XTR11x family of precision current transmitters designed for industrial sensor interfaces. It shares functional similarities with the XTR114 but differs in excitation current magnitude. The part is commonly used in conjunction with external resistors for gain setting and linearization to interface directly with standard industrial control loops.

Sensor And Detector Interfaces Replacement Considerations

XTR114U/2K5 offers identical functionality with 100μA excitation currents instead of 250μA.