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LTC2984 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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LTC2984 bảng dữ liệu(HTML) 1 Page - Analog Devices |
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1 / 78 page  LTC2984 1 2984fb For more information www.linear.com/LTC2984 TYPICAL APPLICATION FEATURES DESCRIPTION Multi-Sensor High Accuracy Digital Temperature Measurement System with EEPROM The LTC®2984 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution. The LTC2984 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold junction temperatures and linearize the results. The device can also measure temperature with standard 2-, 3-, or 4-wire RTDs, thermistors, and diodes. It has 20 reconfigurable analog inputs enabling many sen- sor connections and configuration options. The LTC2984 includes excitation current sources and fault detection circuitry appropriate for each type of temperature sensor as well as an EEPROM for storing custom coefficients and channel configuration data. The LTC2984 allows direct interfacing to ground referenced sensors without the need for level shifters, negative supply voltages, or external amplifiers. All signals are buffered and simultaneously digitized with three high accuracy, 24-bit ∆∑ ADC's,drivenbyaninternal10ppm/°C(maximum)reference. Thermocouple Measurement with Automatic Cold Junction Compensation Typical Temperature Error Contribution APPLICATIONS L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents Pending n Directly Digitizes 2-, 3-, or 4-Wire RTDs, Thermocouples, Thermistors, and Diodes n On-Chip EEPROM Stores Channel Configuration Data and Custom Coefficients n Single 2.85V to 5.25V Supply n 20 Flexible Inputs Allow Interchanging Sensors n Automatic Thermocouple Cold Junction Compensation n Built-In Standard and User-Programmable Coefficients for Thermocouples, RTDs and Thermistors n Measures Negative Thermocouple Voltages n Automatic Burn Out, Short-Circuit and Fault Detection n Buffered Inputs Allow External Protection n Simultaneous 50Hz/60Hz Rejection n Includes 15ppm/°C (Max) Reference (I-Grade) n Direct Thermocouple Measurements n Direct RTD Measurements n Direct Thermistor Measurements n Custom Sensor Applications 2984 TA01a °C/°F VREF (10ppm/°C) EEPROM LTC2984 24-BIT ∆∑ ADC 24-BIT ∆∑ ADC 24-BIT ∆∑ ADC RSENSE 2k 1 4 2 3 0.1µF 2.85V TO 5.25V 1k 1k PT-100 RTD LINEARIZATION/ FAULT DETECTION SPI INTERFACE TEMPERATURE (°C) –200 –0.5 0.3 0.2 0.1 –0.1 –0.2 –0.3 –0.4 0.5 200 600 800 2984 TA01b 0 0.4 0 400 1000 1400 1200 THERMISTOR THERMOCOUPLE RTD 3904 DIODE |
Số phần tương tự - LTC2984 |
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Mô tả tương tự - LTC2984 |
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