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LTC2983 Multi-Sensor, High-Accuracy, Digital Temperature Measurement System

Analog Devices' LTC2983 temperature measurement IC directly digitizes RTDs, thermocouples, thermistors and external diodes with high performance

Image of Analog Devices LTC2983 Temp Measurement ICAnalog Devices' 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.

Features
  • Directly digitize RTDs, thermocouples, thermistors and diodes
  • Single 2.85 V to 5.25 V supply
  • 20 flexible inputs allow multiple sensor types
  • Automatic thermocouple cold junction compensation
  • Standard and user-programmable coefficients for linearizing thermocouples, RTDs and thermistors
  • Configurable 2-, 3-, 4-wire RTD configurations
  • Measures negative thermocouple voltages without a negative supply
  • Automatic burn out, short-circuit and fault detection
  • Buffered inputs allow external protection and direct interface to resistive sensors
  • Simultaneous 50 Hz / 60 Hz rejection
  • Includes 10 ppm/°C (max) reference

 

Image of Analog Devices LTC2983 Temp Error Graph
Applications
  • Direct thermocouple measurements
  • Direct RTD measurements
  • Direct thermistor measurements
  • Custom sensor applications
Videos: LTC2983 TechClips
Image of Analog Devices LTC2983 RTD Techclip videoRTD - Temp measurement system directly interfaces to RTDs, applies excitation current, simultaneously measures the RTD and sense resistor.   Image of Analog Devices LTC2983 Thermistor videoThermistor - Temp measurement system directly interfaces to thermistors, applies excitation current, simultaneously measures thermistor and sense resistor.   Image of Analog Devices LTC2983 Thermocoupler videoThermocouple - Temp measurement system directly interfaces to thermocouples, simultaneously measures thermocouple output voltage and cold junction temperature.

LTC2983

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC SENSOR THERMALLTC2983CLX#PBFIC SENSOR THERMAL490 - ImmediateView Details
IC SENSOR THERMALLTC2983ILX#PBFIC SENSOR THERMAL38 - ImmediateView Details

Eval Boards

ImageManufacturer Part NumberDescriptionAvailable Quantity
EVAL BOARD FOR LTC2983DC2296AEVAL BOARD FOR LTC29833 - ImmediateView Details
EVAL KIT FOR LTC2983DC2296A-KITEVAL KIT FOR LTC298320 - ImmediateView Details
DEDICATED RTD BOARDDC2213ADEDICATED RTD BOARD5 - ImmediateView Details
TEMPERATURE MEASUREMENT BOARDDC2211ATEMPERATURE MEASUREMENT BOARD0View Details
THERMOCOUPLE BOARDDC2212ATHERMOCOUPLE BOARD5 - ImmediateView Details
DEDICATED THERMISTOR BOARDDC2214ADEDICATED THERMISTOR BOARD0View Details
Published: 2014-12-08