Maxim begins sampling 1-Wire thermocouple-to-digital converters to simplify multisensor designs
The devices achieve ±2.0 °C accuracy (not including sensor nonlinearity) while integrating all of the functions required for a complete thermocouple-to-digital solution. Additionally, the MAX31850/MAX31851’s 1-Wire interface allows multiple sensor locations to communicate and draw power over a single data line, greatly simplifying wiring requirements. Designers can use the MAX31850 or MAX31851 instead of multiple discret e components for accurate temperature measurement in medical, industrial, and solar applications.
Because thermocouple output voltages are small and cold-junction compensation is needed to achieve accurate results, the digitization of thermocouple signals can be a challenge. The MAX31850/MAX31851 are the industry’s first solution to integrate a discrete analog-to-digital converter (ADC), a highly accurate reference, a temperature sensor for cold-junction compensation, and a 1-Wire bus interface into a single chip.
The versatile converters operate with several types of thermocouples, speeding system design, lowering system cost, and reducing the bill of materials (BOM). The MAX31850/MAX31851 also identify open or shorted thermocouples that could result in erroneous temperature readings or system faults. A microcontroller can read the fault status at any time to help ensure uptime and prevent costly repairs.
Availability and Pricing
Available in a 10-pin, exposed-pad TDFN package (3 mm x 4 mm x 0.75 mm). Specified over the -40 to +125°C temperature range. Pricing starts at $3.10 (1000-up, FOB USA).
Visit Maxim Integrated at www.maximintegrated.com
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