描述 Description

The LT?1025 is a micropower thermocouple cold junctioncompensator for use with type E, J, K, R, S, and Tthermocouples. It utilizes wafer level and post-packagetrimming to achieve 0.5°C initial accuracy. Special curvaturecorrection circuitry is used to match the ?bow? found in allthermocouples so that accurate cold junction compensationis 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°Cinternal temperature rise for supply voltages under 10V.A 10mV/°C output is available at low impedance, in additionto the direct thermocouple voltages of 60.9μV/°C (E),51.7μV/°C (J), 40.3μV/°C (K, T) and 5.95μV/°C (R, S). Alloutputs are essentially independent of power supply voltage.
A special kit is available (LTK001) which contains an LT1025and a custom tailored thermocouple amplifier. The amplifierand compensator are matched to allow a much tighter specificationof temperature error than would be obtained by addingthe 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 SOpackage for temperatures between 0°C and 70°C.

特性 Features

? 80μA 電源電流
? 4V 至 36V 工作電壓范圍
? 0.5°C 初始準確度 (A 版本)
? 可兼容標準熱電偶 (E、J、K、R、S、T)
? 輔助的 10mV/°C 輸出
? 采用 8 引腳 PDIP 封裝和 SO 封裝

應用 Application

? 熱電偶冷結(jié)點補償器
? 攝氏溫度計
? 溫度補償網(wǎng)絡

簡介

LT1025屬于集成電路（IC）的傳感器檢測器接口。由制造生產(chǎn)的LT1025傳感器和檢測器接口該系列產(chǎn)品可執(zhí)行信號調(diào)節(jié)、數(shù)據(jù)轉(zhuǎn)換、激勵生成和/或各種將傳感器或變送器機構(gòu)連接到主機設備所需的其他功能。示例包括用于 CCD 圖像傳感器的控制器、用于 4-20 mA 接口和類似應用的電流變送器、超聲變送器前端、惠斯通電橋接口等。