XTR114UA/2K5

Sensor And Detector Interfaces Overview

The XTR114UA/2K5 is a monolithic two-wire current transmitter manufactured by Texas Instruments, housed in an SO-14 surface-mount package. It provides complete excitation for high impedance platinum RTD temperature sensors and bridges, including instrumentation amplifier and current output circuitry on a single integrated circuit. The device features two precision 100μA current sources for RTD excitation and versatile linearization circuitry that provides second-order correction to the RTD, typically achieving a 40:1 improvement in linearity. It operates on loop power supply voltages ranging from 7.5V to 36V and is specified for the -40°C to +85°C industrial temperature range.

Sensor And Detector Interfaces Feature Summary

• Integrates two matched 100μA current sources for RTD or bridge excitation
• Provides second-order linearization correction to improve RTD linearity by approximately 40:1
• Features low offset drift of 0.4μV/°C and high power supply rejection ratio of 110dB minimum
• Supports both two-wire and three-wire RTD operation with configurable instrumentation amplifier gain

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 indicates tape and reel packaging containing 2500 devices per reel. Confirm the UA variant meets the required industrial temperature specifications. Ensure compatibility with existing SO-14 footprint designs. Cross-reference datasheet revisions for any updates to absolute maximum ratings or electrical characteristics before finalizing procurement orders.

Sensor And Detector Interfaces Selection Notes

Select the XTR114UA/2K5 when using high impedance platinum RTDs requiring lower excitation currents compared to the XTR112. Calculate external resistor values for RG, RLIN1, and RLIN2 based on the specific measurement temperature span and RTD type. Consider using an external transistor to isolate power dissipation from the precision input circuitry if operating at higher loop supply voltages or temperatures.

Sensor And Detector Interfaces Part Context

This component belongs to the XTR11x family of 4-20mA current transmitters designed for sensor interface applications. It shares architectural similarities with the XTR112 but differs primarily in its internal reference current magnitude. The XTR114 utilizes 100μA sources versus the XTR112's 250μA sources, making it suitable for different RTD resistance ranges and power constraints within industrial sensing environments.

Sensor And Detector Interfaces Replacement Considerations

XTR114U serves as the rail-compatible alternative for non-reel packaging requirements.