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
TTHERMOCOUPLE
=
+100°C, TA
= +25°C
(Note 2)
VCC = +3.3V -1 +1
°C
VCC = +5V -1.5 +1.5
TTHERMOCOUPLE
=
0°C to +125°C, TA
=
+25°C (Note 2)
VCC = +3.3V -2 +2
VCC = +5V -3 +3
Temperature Conversion
Constant
5.125 µv/LSB
Cold-Junction Compensation
TA = +25°C VCC = +3.3V -1 +1
°C
TA = -20°C to +85°C
(Note 2)
VCC = +3.3V and
+5V
-3 +3
Resolution 0.125 °C
Thermocouple Input Impedance 20 kW
Supply Voltage VCC 3.0 5.5 V
Supply Current ICC 1 2 mA
Power-On Reset Threshold VCC rising 1 2 2.5 V
Power-On Reset Hysteresis 50 mV
Conversion Time (Note 2) 0.15 0.18 s
SERIAL INTERFACE
Input Low Voltage VIL
0.3 x
VCC
V
Input High Voltage VIH
0.7 x
VCC
V
Input Leakage Current ILEAK VIN = GND or VCC -5 5 µA
Input Capacitance CIN 5 pF
www.maximintegrated.com
Maxim Integrated
│
2
MAX6674 Cold-Junction-Compensated K-Thermocouple-
to-Digital Converter (0°C to +128°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