LT1025ACN8#PBF

Sensor And Detector Interfaces Overview

The LT1025ACN8#PBF is a micropower thermocouple cold junction compensator manufactured by Analog Devices Inc. It operates within a supply voltage range of 4V to 36V with a typical supply current of 80mA. The device provides specific output voltages for Type E, J, K, R, S, and T thermocouples, alongside a universal 10mV/°C output. The A-grade version guarantees an initial temperature accuracy of 0.5°C at 25°C. It utilizes wafer-level and post-package trimming with special curvature correction circuitry to maintain accuracy over a wider temperature range. The component is housed in an 8-lead PDIP package and supports operating temperatures from 0°C to 70°C.

Sensor And Detector Interfaces Feature Summary

• Provides direct thermocouple voltage outputs for Types E, J, K, R, S, and T along with a standardized 10mV/°C signal.
• Incorporates built-in nonlinearity correction to compensate for the parabolic 'bow' characteristic of thermocouples.
• Achieves high precision through wafer-level and post-package trimming techniques.
• Operates efficiently with low power consumption suitable for sensitive measurement environments.

Sensor And Detector Interfaces Applications

• Thermocouple cold junction compensation
• Centigrade thermometer circuits
• Temperature compensation networks

Sensor And Detector Interfaces Procurement Notes

Verify the component authenticity by checking the manufacturer markings against the official datasheet specifications. Ensure the ordering suffix matches the required package type and temperature grade. Confirm that the supplier provides valid traceability documentation for quality assurance purposes before finalizing any acquisition.

Sensor And Detector Interfaces Selection Notes

Select the LT1025ACN8#PBF when high initial accuracy is required for standard thermocouple types. The A-version offers tighter tolerance compared to the standard C-version. Consider the thermal resistance and supply voltage to manage internal temperature rise. Ensure the application environment stays within the specified commercial temperature limits.

Sensor And Detector Interfaces Part Context

This component belongs to the LT1025 family of micropower thermocouple cold junction compensators. It is designed to replace traditional ice-bath references in modern electronic systems. The device simplifies interface design by providing matched outputs directly proportional to the Seebeck coefficients of various thermocouple metals.

Sensor And Detector Interfaces Replacement Considerations

LT1025CN8#PBF

Sensor And Detector Interfaces FAQ

How does the LT1025 handle thermocouple nonlinearity?

It uses special curvature correction circuitry that introduces a deliberate parabolic 'bow' into the output to match the nonlinearity found in all thermocouples.

What is the maximum supply voltage for this device?

The LT1025 can operate with a supply voltage ranging from 4V up to 36V.

Why is physical placement important for the LT1025?

The device must be located physically close to the thermocouple cold junction to ensure accurate temperature tracking and minimize local temperature gradients.