LTC2983C Datasheet - Linear Technology

DESCRIPTION
The LTC®2983 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.

FEATURES
■ Directly Digitize RTDs, Thermocouples, Thermistors
   and Diodes
■ Single 2.85V to 5.25V Supply
■ Results Reported in °C or °F
■ 20 Flexible Inputs Allow Interchanging Sensors
■ Automatic Thermocouple Cold Junction Compensation
■ Built-In Standard and User-Programmable Coefficients
   for Thermocouples, RTDs and Thermistors
■ Configurable 2-, 3- or 4-Wire RTD Configurations
■ Measures Negative Thermocouple Voltages
■ Automatic Burn Out, Short-Circuit and Fault Detection
■ Buffered Inputs Allow External Protection
■ Simultaneous 50Hz/60Hz Rejection
■ Includes 15ppm/°C (Max) Reference (I-Grade)

APPLICATIONS
■ Direct Thermocouple Measurements
■ Direct RTD Measurements
■ Direct Thermistor Measurements
■ Custom Sensor Applications