MAX31855
Cold-Junction Compensated
Thermocouple-to-Digital Converter
(VCC = +3.3V, TA = +25NC, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
1.4
1.2
VCC = 3.6V
1.0
0.8
VCC = 3.3V
VCC = 3.0V
0.6
0.4
0.2
0
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
Typical Operating Characteristics
INTERNAL TEMPERATURE SENSOR
ACCURACY
0.7
VCC = 3.3V
0.6
0.5
0.4
NOTE: THIS DATA WAS TAKEN
0.3
IN PRECISION BATH SO HIGH
TEMPERATURE LIMIT IS 90°C
0.2
0.1
0
-0.1
-0.2
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
ADC ACCURACY vs. ADC INPUT VOLTAGE
ACROSS TEMPERATURE
0.3
0.2
AT -40°C
0.1
0
-0.1
AT +85°C
-0.2
-0.3
-0.4
AT +25°C
-0.5
-0.6
VCC = 3.3V
-0.7
0
20
40
60
ADC INPUT VOLTAGE (mV)
ADC ACCURACY vs. ADC INPUT VOLTAGE
ACROSS VCC
0
-0.1
VCC = 3.0V
-0.2
-0.3
-0.4
VCC = 3.3V
-0.5
-0.6
-0.7
VCC = 3.6V
-0.8
-0.9
INTERNAL TEMPERATURE = +25°C
-1.0
0
20
40
60
ADC INPUT VOLTAGE (mV)
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