器件名称:
MAX31850/MAX31851
功能描述:
Cold-Junction Compensated, 1-Wire Thermocouple-to-Digital Converters
文件大小:
1665.54KB 共25页
简 介:
EVALUATION KIT AVAILABLE MAX31850/MAX31851 Cold-Junction Compensated, 1-Wire Thermocouple-to-Digital Converters General Description The MAX31850/MAX31851 cold-junction compensated, 1-WireM thermocouple-to-digital converters perform cold-junction compensation and digitize the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The converters resolve temperatures to 0.25NC, allow readings as high as +1768NC and as low as -270NC, and exhibit thermocouple accuracy of 8 LSBs (2NC) for temperatures ranging from -200NC to +700NC. Communication with the master microcontroller is over a 1-Wire bus that by definition requires only one data line (and ground) for communication. Operating power can be obtained directly from the data line (“parasite power”), eliminating the need for an external power supply. Each device has a unique 64-bit serial code, which allows multiple units to function on the same 1-Wire bus. Therefore, it is simple to use one microcontroller (the master device) to monitor temperature from many thermocouples distributed over a large area. Four location address inputs simplify mapping of individual units to specific locations. S Cold-Junction Compensation S 14-Bit, 0.25NC Resolution S Versions Available for K-, J-, N-, T-, S-, R-, and E-Type Thermocouples (see Table 1) S 1-Wire Interface (Read-Only); Power Can Be Obtained from Interface (Parasite-Powered Mode) S Detects Thermocouple Shorts to GND or VDD S Detects Open Thermocouple Features Applications In……
