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Documents Can I connect BIAS to TC+ instead of TC- on MAX31856, will this affect accuracy?
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  • DATA CONVERTERS SUPPORT COMMUNITY
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    • Can I connect BIAS to TC+ instead of TC- on MAX31856, will this affect accuracy?
    • Can I interface InfraRed Thermocouple to MAX31856?
    • Does the /CS pin on the MAX31856 have an internal pull up? Can it be left floating?
    • Does the MAX31856 use a sample and hold at the input?
    • How do I interpret the full scale error of the MAX31856?
    • How to deal with 50Hz noise for Thermocouple?
    • In the MAX31856, if a series resistance is used to reduce noise from the thermocouple (as in Figure 8 of datasheet), can the BIAS output be connected directly to T-?
    • MAX31856 have voltage mode and code formula mentioned on datasheet P20.Could you please explain code formula theory?What is 1.6 and 2^17 mean of this formula?
    • MAX31856 Open Circuit Fault Detection not detected upon startup with no thermocouple attached
    • There is a OVUV Fault flagged in the MAX31856. Could Open Circuit Detection be engaged to pull the circuit out of the Fault state?
    • To lower system operation current, the MAX31856 is designated as single conversion during the design phase (ON Duty 1/60). However, for most components the standby currents are between 10uA -- 500uA. The data sheet mentions that the standby current is 5.25
    • Using the MAX31856 and have a OVUV Fault which is still there even when the fault is removed. What is the issue?
    • What could be causing erroneous faults conditions and random temperature shifts in the MAX31856?
    • What is causing the MAX31856 to experience large voltages/oscillations?
    • What is the purpose of the MAX31856EVKIT 150 ohm series resistors on the digital lines?
  • +MAX31865 RTD-DIGIT: FAQ
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Can I connect BIAS to TC+ instead of TC- on MAX31856, will this affect accuracy?

Revision Creation Date Revision Author
Current Revision 10 Feb 2026 10:54 AM EngineerZone
Revision #4 10 Feb 2026 10:38 AM MSDAPI
Revision #3 10 Feb 2026 10:38 AM MSDAPI
Revision #2 19 Dec 2023 5:52 PM MSDAPI
Revision #1 17 May 2019 3:22 AM MSDAPI
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