XTR112UA/2K5

Sensor And Detector Interfaces Overview

The XTR112UA/2K5 is a monolithic two-wire current transmitter designed for RTD and bridge sensor applications. It integrates precision instrumentation amplifiers, linearization circuitry, and dual 250µA current sources for high-impedance platinum RTDs. The device operates on loop supply voltages from 7.5V to 36V in an SO-14 package. Key electrical parameters include a specified output current range of 4mA to 20mA with an over-scale limit up to 30mA. The input offset voltage drift is typically 1.5µV/°C, and the power supply rejection ratio is 110dB minimum. It supports industrial temperature ranges from -40°C to +85°C.

Sensor And Detector Interfaces Feature Summary

• Integrates complete signal conditioning including instrumentation amplifier, linearization, and current output circuitry on a single chip.
• Provides dedicated excitation current sources suitable for driving high-impedance platinum RTD sensors.
• Features versatile second-order linearization circuitry to correct inherent RTD nonlinearity.
• Supports both two-wire and three-wire RTD configurations for remote sensing applications.

Sensor And Detector Interfaces Applications

• Industrial process control systems requiring precise temperature monitoring.
• Factory automation equipment utilizing remote transducers.
• SCADA remote data acquisition networks.
• Remote temperature and pressure transducer interfaces.

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix /2K5 indicates tape and reel packaging containing 2500 devices per reel. Confirm the UA variant meets the required industrial temperature specifications. Ensure the ordering number matches the exact pinout and functional requirements for the target design.

Sensor And Detector Interfaces Selection Notes

Select this component when integrating platinum RTD sensors into two-wire loop architectures. The internal 250µA current sources are optimized for high-impedance sensors. Consider external transistor usage if significant power dissipation occurs at higher loop voltages to maintain accuracy.

Sensor And Detector Interfaces Part Context

This part belongs to the XTR11x family of current transmitters manufactured by Texas Instruments (formerly Burr-Brown). It shares architectural similarities with the XTR114 but utilizes higher excitation currents. The series is designed for robust industrial environments where long-term stability and low drift are critical.

Sensor And Detector Interfaces Replacement Considerations

XTR114UA/2K5 offers identical functionality with lower 100µA excitation currents. XTR105UA/2K5 provides similar current transmission but lacks the specific dual current source configuration for RTDs.