LT1025ACN80#PBF

Sensor And Detector Interfaces Overview

The LT1025ACN8#PBF is a micropower thermocouple cold junction compensator manufactured by Analog Devices Inc. It provides accurate compensation for Type E, J, K, R, S, and T thermocouples with an initial accuracy of ±0.5°C at 25°C. The device operates on a single supply voltage ranging from 4V to 36V, drawing a typical supply current of 80mA. It features dedicated outputs scaled to the Seebeck coefficients of specific thermocouple types (e.g., 40.6mV/°C for Type K) and a universal 10mV/°C output. The component is housed in an 8-lead PDIP package and is designed for industrial temperature measurement applications requiring precise cold junction reference.

Sensor And Detector Interfaces Feature Summary

• Integrated curvature correction circuitry matches the non-linear 'bow' characteristic of standard thermocouples to maintain accuracy across wide temperature ranges.
• Provides direct thermocouple-specific voltage outputs alongside a low-impedance 10mV/°C signal for simplified interface with analog-to-digital converters or amplifiers.
• Utilizes wafer-level and post-package trimming to achieve high initial temperature accuracy without requiring external calibration components.

Sensor And Detector Interfaces Applications

• Industrial process control systems utilizing Type K or Type J thermocouples
• Precision laboratory equipment requiring calibrated temperature monitoring
• HVAC systems with remote sensing capabilities

Sensor And Detector Interfaces Procurement Notes

Verify the complete part number includes the #PBF suffix to ensure compliance with RoHS directives and lead-free manufacturing standards. Confirm that the AC grade specification meets the required ±0.5°C accuracy tolerance for the intended application environment. Ensure the ordering documentation specifies the N8 package variant to match the physical footprint requirements of the target PCB layout.

Sensor And Detector Interfaces Selection Notes

Select the LT1025ACN8#PBF when higher initial accuracy is critical compared to the standard LT1025CN8 variant. This model guarantees tighter error bounds at 25°C, reducing the need for system-level calibration. Consider the thermal resistance characteristics of the PDIP package when designing heat dissipation strategies, as self-heating can impact measurement precision if supply voltages exceed recommended levels.

Sensor And Detector Interfaces Part Context

This component belongs to the LT1025 family of micropower cold junction compensators. It serves as a foundational reference element in thermocouple signal conditioning chains, replacing traditional ice-bath references or complex discrete resistor networks. The device simplifies design by integrating the temperature sensor and scaling logic into a single monolithic IC.

Sensor And Detector Interfaces Replacement Considerations

The LT1025CN8#PBF offers similar functionality but with lower initial accuracy specifications. The LT1025CS8#PBF provides the same electrical performance in an SOIC-8 surface-mount package. Verify pin compatibility and thermal management requirements when substituting between package types.