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MAX31855KASA+T Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX31855KASA+T
Description  Cold-Junction Compensated Thermocouple-to-Digital Converter
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX31855KASA+T Datasheet(HTML) 4 Page - Maxim Integrated Products

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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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