Milpitas, Calif. - Linear Technology Corp. has launched the LTC2983 high performance digital temperature measurement IC, which directly digitizes RTDs, thermocouples, thermistors and external diodes with 0.1°C accuracy and 0.001°C resolution. The analog front end offers low noise, low offset buffered ADCs, and all the necessary excitation and control circuits for each sensor. The measurements are performed under the control of a digital engine combining all the algorithms and linearization required for each, said Linear Tech.
The LTC2983 provides a multiplexed high precision interface to virtually any sensor, according to the company. 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. The device offers up to twenty analog inputs, and digitized measurements can be output in Centigrade or Fahrenheit. In addition, the SPI interface works with virtually any digital system, and a software support system allows for easy customization.
The LTC2983 interfaces with a variety of temperature sensors, including type B, E, J, K, N, S, R, T thermocouples; 2, 3, or 4-wire RTDs, 2.25 kΩ to 30 kΩ thermistors and temperature sensing diodes. The device operates with ground referenced sensors without requiring amplifiers, negative supplies, or level shift circuitry.
Availability: 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- x 7-mm LQFP-48 package.
Pricing: Starts at $19.49 each in quantities of 1,000. The USA list pricing is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.