Datasheet

 2015-2017 Microchip Technology Inc. DS20005426C-page 21
MCP9600
5.0 FUNCTIONAL DESCRIPTION
The MCP9600 temperature sensor consists of an 18-bit
Delta-Sigma Analog-to-Digital Converter (ADC), which is
used to measure the thermocouple voltage or EMF, a
digital temperature sensor used to measure cold-junction
or ambient temperature and a processor core which is
used to compute the EMF to degree Celsius conversion
using coefficients derived from the NIST ITS-90
coefficients. Figure 5-1 shows a block diagram of how
these functions are structured in the device.
FIGURE 5-1: Functional Block Diagram.
Del Sig
V
IN+
V
IN-
ADC Core
Error Correction

Thermocouple Hot-Junction, T
H
Thermocouple
Thermocouple Junctions Delta, T
∆
Thermocouple Cold-Junction, T
C
User Registers:
Sensor Configuration
Digital
Filter
Thermocouple
Type
Selection
Device Resolution and Power Modes
Sensor Status
Alert 1 Limit
Hysteresis
Configuration
Alert 2 Limit
Hysteresis
Configuration
Alert 3 Limit
Hysteresis
Configuration
Alert 4 Limit
Hysteresis
Configuration
Device ID
+
Alert 1 Output
Alert 2 Output
Alert 3 Output
Alert 4 Output
SCL
SDA
ADDR
I
2
C Module