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LTKA01CN8

製品説明
仕様・特性

LTK001 Thermocouple Cold Junction Compensator and Matched Amplifier thermocouple applications. It has low supply current to minimize warmup drift, very low offset voltage (<35µV), high gain, and extremely low input bias currents (<600pA) to allow high impedance input filters to be used without degrading offset voltage or drift. FEATURES ■ ■ ■ ■ ■ ■ 0.75°C Initial Accuracy (A Version) Extremely Low Warmup Drift Preset Outputs for Type E, J, K, R, S, T Single 5V to ± 20V Operation 480µA Typical Supply Current Available in 8-Pin DIP Package Matching of the kits is accomplished by separating the compensators and amplifiers according to the polarity of their initial (room temperature) errors. This eliminates the need to sum the errors of the two components to find the worst-case error. U APPLICATIO S ■ The LTK001 has direct thermocouple outputs of 60.9µV/°C (E), 51.7µV/°C (J), 40.6µV/°C (K, T), and 5.95µV/°C (R, S). It also has a 10mV/°C output which can be scaled to match any arbitrary thermocouple. Thermocouple Cold Junction Compensation U DESCRIPTIO The LTK001 is a thermocouple amplifier supplied with a matched cold junction compensator. By separating the amplifier and compensator functions, the problem of compensator temperature rise is virtually eliminated. The compensator is a selected version of the LT®1025 cold junction compensator. The amplifier, which is also available separately as LTKA0x has been specially selected for For multiple thermocouple applications using one compensator, amplifiers may be ordered separately (LTKA0x), still matched to the compensator. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. For typical performance curves and applications circuits consult the LT1025 data sheet. U TYPICAL APPLICATIO Type K 10mV/°C Thermometer R2 100Ω FULL-SCALE TRIM R3** 255k 1% C2 0.1µF R1 1k 1% V+ V+ – LTKA0x VIN K – LT1025 GND * + C1 0.1µF + VOUT 10mV/°C V– TYPE K V0 R– R4* V– – *R4 ≤ V , R4 IS NOT REQUIRED (OPEN) FOR 30µA LT1025 TEMPERATURES ≥ 0°C. **SELECTED FOR 0°C–100°C RANGE LTK001 TA01 001fa 1

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