LT1025 Micropower Thermocouple Cold Junction Compensator
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
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LT1025 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LT1025ACN8 | PDIP | 8 | C | $5.75 | $4.60 |
| LT1025ACN8#PBF | PDIP | 8 | C | $5.75 | $4.60 |
| LT1025CN8 | PDIP | 8 | C | $3.08 | $2.55 |
| LT1025CN8#PBF | PDIP | 8 | C | $3.08 | $2.55 |
| LT1025CS8 | SO | 8 | C | $4.21 | $2.95 |
| LT1025CS8#PBF | SO | 8 | C | $4.21 | $2.95 |
| LT1025CS8#TR | SO | 8 | C | $3.01 | |
| LT1025CS8#TRPBF | SO | 8 | C | $3.01 | |
| LT1025MJ8 | CERDIP | 8 | M | $30.30 |
LT1025 数据手册及相关资料下载
- 数据手册(英文) : LT1025 - Micropower Thermocouple Cold Junction Compensator.PDF
- 应用指南 (英文) : AN10 - Methods for Measuring Op Amp Settling Time.PDF
- 应用指南 (英文) : AN28 - Thermocouple Measurement.PDF
- 应用指南 (英文) : AN45 - Measurement and Control Circuit Collection.PDF
- 应用指南 (英文) : AN67 - linear Technology Magazine Circuit Collection, Volume III.PDF
- 设计要点 (英文) : DN302 - Ultraprecise Instrumentation Amplifier Makes Robust Thermocouple Interface.PDF
- 设计要点 (英文) : DN5 - Temperature Measurement Using the LTC1090/91/92 Series of Data Acquisition Systems.PDF
- 可靠性数据 : R161 Reliability Data .PDF
- 产品选型卡 : Precision High Side Current Sense Amplifiers.PDF
