Datasheet
Supply Voltage (V
CC
to GND) ............................... -0.3V to +6V
SO, SCK, CS, T-, T+ to GND .....................-0.3V to V
CC
+ 0.3V
SO Current ....................................................................... 50mA
ESD Protection (Human Body Model) .......................... ±2000V
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C) ............. 471mW
Operating Temperature Range .......................... -20°C to +85°C
Storage Temperature Range ........................... -65°C to +150°C
Junction Temperature ................................................... . +150°C
SO Package
Vapor Phase (60s) . .....................................................+215°C
Infrared (15s) .............................................................. +220°C
Lead Temperature (soldering, 10s) ............................... +300°C
(V
CC
= +3.0V to +5.5V, T
A
= -20°C to +85°C, unless otherwise noted. Typical values specified at +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Temperature Error
T
THERMOCOUPLE
= +700°C,
T
A
= +25°C (Note 2)
V
CC
= +3.3V -5 +5
LSB
V
CC
= +5V -6 +6
T
THERMOCOUPLE
= 0°C to
+700°C, T
A
= +25°C (Note 2)
V
CC
= +3.3V -8 +8
V
CC
= +5V -9 +9
T
THERMOCOUPLE
= +700°C
to +1000°C, T
A
= +25°C (Note 2)
V
CC
= +3.3V -17 +17
V
CC
= +5V -19 +19
Thermocouple Conversion
Constant
10.25 µV/LSB
Cold-Junction
Compensation Error
T
A
= -20°C to
+85°C (Note 2)
V
CC
= +3.3V -3.0 +3.0
°C
V
CC
= +5V -3.0 +3.0
Resolution 0.25 °C
Thermocouple Input
Impedance
60 kW
Supply Voltage V
CC
3.0 5.5 V
Supply Current I
CC
0.7 1.5 mA
Power-On Reset Threshold V
CC
rising 1 2 2.5 V
Power-On Reset Hysteresis 50 mV
Conversion Time (Note 2) 0.17 0.22 s
SERIAL INTERFACE
Input Low Voltage V
IL
0.3 x
V
CC
V
Input High Voltage V
IH
0.7 x
V
CC
V
Input Leakage Current I
LEAK
V
IN
= GND or V
CC
±5 µA
Input Capacitance C
IN
5 pF
www.maximintegrated.com
Maxim Integrated
│
2
MAX6675 Cold-Junction-Compensated K-Thermocouple-
to-Digital Converter (0°C to +1024°C)
Electrical Characteristics
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Absolute Maximum Ratings