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MAX31855KASA+T Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX31855KASA+T Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 13 page ����������������������������������������������������������������� Maxim Integrated Products 4 MAX31855 Cold-Junction Compensated Thermocouple-to-Digital Converter Note 2: All voltages are referenced to GND. Currents entering the IC are specified positive, and currents exiting the IC are negative. Note 3: Guaranteed by design; not production tested. Note 4: Not including cold-junction temperature error or thermocouple nonlinearity. Note 5: Specification is 100% tested at TA = +25NC. Specification limits over temperature (TA = TMIN to TMAX) are guaranteed by design and characterization; not production tested. Note 6: Because the thermocouple temperature conversions begin at VPOR, depending on VCC slew rates, the first thermocouple temperature conversion may not produce an accurate result. Therefore, the tCONV_PU specification is required after VCC is greater than VCCMIN to guarantee a valid thermocouple temperature conversion result. Note 7: For all pins except T+ and T- (see the Thermocouple Input Bias Current parameter in the DC Electrical Characteristics table). SERIAL-INTERFACE TIMING CHARACTERISTICS (See Figure 1 and Figure 2.) THERMAL CHARACTERISTICS (continued) (3.0V P VCC P 3.6V, TA = -40NC to +125NC, unless otherwise noted.) (Note 4) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Leakage Current ILEAK (Note 7) -1 +1 µA Input Capacitance CIN 8 pF Serial-Clock Frequency fSCL 5 MHz SCK Pulse-High Width tCH 100 ns SCK Pulse-Low Width tCL 100 ns SCK Rise and Fall Time 200 ns CS Fall to SCK Rise tCSS 100 ns SCK to CS Hold 100 ns CS Fall to Output Enable tDV 100 ns CS Rise to Output Disable tTR 40 ns SCK Fall to Output Data Valid tDO 40 ns CS Inactive Time (Note 3) 200 ns PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Thermocouple Temperature Data Resolution 0.25 N C Internal Cold-Junction Temperature Error TA = -20NC to +85NC (Note 3) -2 +2 N C TA = -40NC to +125NC (Note 3) -3 +3 Cold-Junction Temperature Data Resolution TA = -40NC to +125NC 0.0625 N C Temperature Conversion Time (Thermocouple, Cold Junction, Fault Detection) tCONV (Note 5) 70 100 ms Thermocouple Conversion Power-Up Time tCONV_PU (Note 6) 200 ms |
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