Temperature-sensor IC offers 0.1°C accuracy

Nov. 24, 2014

The LTC2983 high-performance digital temperature-measurement IC directly digitizes RTDs, thermocouples, thermistors, and external diodes with 0.1°C accuracy and 0.001°C resolution. A high-performance analog front end combines low-noise and low-offset buffered ADCs 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 linearization required for each. The LTC2983 provides a multiplexed high-precision interface to virtually any sensor. It precisely measures absolute microvolt-level signals from thermocouples and ratiometric resistance measurements from RTDs and thermistors, linearizes the results, and outputs the results in °C or °F. Up to twenty analog inputs are available. The SPI interface works with virtually any digital system, and a comprehensive software support system with drop-down menus allows easy customizing of the LTC2983.

The LTC2983 is offered in commercial and industrial versions, supporting operating temperature ranges from 0°C to 70°C and -40°C to 85°C, respectively. The LTC2983 is available today in a RoHS compliant, 7-mm x 7-mm LQFP-48 package. Pricing starts at $19.49 each in 1,000 piece quantities.

Linear Technology Corp., www.linear.com/product/LTC2983

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