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IC linearises temperature sensors with 0.1°C accuracy

Linear Technology has introduced the LTC2983, a digital temperature measurement IC which directly digitises RTDs, thermocouples, thermistors and external diodes with 0.1°C accuracy and 0.001°C resolution.

An analogue front end combines low noise and low offset buffered A/D converters with all the necessary excitation and control circuits for each sensor.

Measurements are performed under the control of a digital engine combining all the algorithms and linearisation required for each.

The LTC2983 precisely measures absolute microvolt level signals from thermocouples and ratiometric resistance measurements from RTDs and thermistors, linearises the results and outputs the results in °C or °F.

Up to twenty analogue inputs are available and digitised measurements can be output in Centigrade or Fahrenheit.

The SPI interface works with virtually any digital system and a software support system with drop down menus allows easy customising of the LTC2983.

Author
Laura Hopperton

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