LT1025 - Micropower Thermocouple Cold Junction Compensator

LT1025 - Micropower Thermocouple Cold Junction Compensator

Features

¡¤                     80µA Supply Current

¡¤                     4V to 36V Operation

¡¤                     0.5¡ãC Initial Accuracy (A Version)

¡¤                     Compatible with Standard Thermocouples (E, J, K, R, S, T)

¡¤                     Auxiliary 10mV/¡ãC Output

¡¤                     Available in 8-Lead PDIP and SO Packages

Typical Application

Description

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¡ãC 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¡ãC internal temperature rise for supply voltages under 10V. A 10mV/¡ãC output is available at low impedance, in addition to the direct thermocouple voltages of 60.9µV/¡ãC (E), 51.7µV/¡ãC (J), 40.3µV/¡ãC (K, T) and 5.95µV/¡ãC (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¡ãC and 70¡ãC.

Packaging

SO-8, DIP-8

 FROM: Company Name: Aunytor Electronic (HK) Co.,Ltd

            Contact Person: liao

            Skype: Aunytor

            Email: 2885745253@qq.com