Nu bliver det lettere at designe multisensorsystemer
Maxim Integrated’s nye 1-Wire termokobler-til-digital konvertere simplificerer designet af multisensorsystemer i industrielle og medico systemdesigns (in english).
Maxim Integrated Products is now sampling the MAX31850/MAX31851 cold-junction-compensated, 1-Wire thermocouple-to-digital converters. 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.
- The digitization of thermocouple signals poses a unique design challenge, especially when a large number of thermocouples are involved, says Amy Gebrian, Senior Business Manager of Thermal Management Products at Maxim Integrated.
- The MAX31850/MAX31851 greatly ease design effort and minimize system wiring by integrating a complete thermocouple digitizer circuit and a single wire interface into one IC.
