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Documents Is it possible to achieve a higher sampling rate from the MAX31855
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Products Mentioned

MAX31855 Production
The MAX31855 performs cold-junction compensation and digitizes the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The data is output in...
Datasheet
MAX31855 on Analog.com

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    • Can the MAX31855 support ungrounded, grounded, and exposed thermocouples?
    • Does any MAX31855 version support all thermocouple types?
    • Does MAX31855 support B-type thermocouples?
    • For the MAX31855, does the thermocouple temperature data require linearization?
    • How many MAX31855 ICs can be connected to a single SPI master?
    • I am getting some error in the thermocouple result of the MAX31855. What could be the cause of that?
    • If there is noise on the voltage supply to the MAX31855, should a low noise voltage regulator be implemented to reduce the temperature conversion error?
    • In the MAX31855, how is the reference junction temperature data used?
    • Is it possible to achieve a higher sampling rate from the MAX31855
    • Is the first 14 bit data read out already cold-junction compensated for MAX31855?
    • Is the SO output of the MAX31855 an open collector (open-drain) or push-pull structure?
    • Multiplexing multiple thermocouples using MAX31855?
    • The MAX31855EVKIT uses Omega connectors, can I use an alternative connector?
    • Using the MAX31855 and external switches to achieve multi-channel temperature conversion, I noticed that some delay needs to be added after switching channel to avoid interference. How do I solve the problem?
    • What are the main differences between the MAX31855 and the MAX31856?
    • What happens if /CS is driven high during data transmission?
    • What happens if I increase the differential capacitance between the T+ and T- pins on the MAX31855?
    • What is Maxim's best alternative to obsolete part MAX6675?
    • What is the purpose of the 12-bit Internal Temperature in MAX31855?
    • When does MAX31855's temperature conversion begin, and how are the different conversion stages triggered?
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Is it possible to achieve a higher sampling rate from the MAX31855

No, the typical conversion time is 70ms, thus the sampling rate would be approximately 14 samples per second. The maximum conversion time is 100ms, thus the sampling rate would be 10 samples per second. You may read from the registers at a faster rate, since SPI serial-clock frequency is 5MHz (max), however the fault and temperature data are only updated once per conversion cycle, when /CS is high.    

Tags: Digital Temperature Sensors MAX31855 Integrated/Special Purpose A/D Converters 000096014 MAX31855EASA+
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