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LT1025-Micropower Thermocouple

LT1025描述The LT™1025 is a micropower thermocouple cold junction compensator for use with type E, J, K, R, S, and T thermocouples. It utilizes wafer level and post-package trimming to achieve 0.5°C initial accuracy. Special curvature correction circuitry is used to match the �bow� found in all thermocouples so that accurate cold junction compensation is maintained over a wider temperature range.

The LT1025 will operate with a supply voltage from 4V to 36V. Typical supply current is 80µA, resulting in less than 0.1°C internal temperature rise for supply voltages under 10V. A 10mV/°C output is available at low impedance, in addition to the direct thermocouple voltages of 60.9µV/°C (E), 51.7µV/°C (J), 40.3µV/°C (K, T) and 5.95µV/°C (R, S). All outputs are essentially independent of power supply voltage.

A special kit is available (LTK001) which contains an LT1025 and a custom tailored thermocouple amplifier. The amplifier and compensator are matched to allow a much tighter specification of temperature error than would be obtained by adding the compensator and amplifier errors on a worst-case basis. The amplifier from this kit is available separately as LTKA0x.

The LT1025 is available in either an 8-pin PDIP or 8-pin SO package for temperatures between 0°C and 70°C.

LT1025特点80µA Supply Current
4V to 36V Operation
0.5°C Initial Accuracy (A Version)
Compatible with Standard Thermocouples (E, J, K, R, S, T)
Auxiliary 10mV/°C Output
Available in 8-Lead PDIP and SO Packages

Typical Application

LT1025典型应用

LT1025封装SO-8, DIP-8

LT1025应用Thermocouple Cold Junction Compensator
Centigrade Thermometer
Temperature Compensation Network

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