By Analog Devices Inc 50
Linear Technology's LTC2983 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 LTC2983 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 sensor connections and configuration options. The LTC2983 includes excitation current sources and fault detection circuitry appropriate for each type of temperature sensor.
The LTC2983 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 ΔΣ ADC's, driven by an internal 10 ppm/°C (maximum) reference.
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Videos: LTC2983 TechClips | ||||
RTD - Temp measurement system directly interfaces to RTDs, applies excitation current, simultaneously measures the RTD and sense resistor. | Thermistor - Temp measurement system directly interfaces to thermistors, applies excitation current, simultaneously measures thermistor and sense resistor. | Thermocouple - Temp measurement system directly interfaces to thermocouples, simultaneously measures thermocouple output voltage and cold junction temperature. |