MCP9600 datasheet(21/50 Pages) MICROCHIP

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DS20005426B-page 21

MCP9600

5.0

FUNCTIONAL DESCRIPTION

The MCP9600 temperature sensor consists of an 18-bit

delta-sigma analog-to-digital converter 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

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

VIN+

VIN-

ADC core

Error correction



Thermocouple Hot-Junction, TH

Thermocouple

Thermocouple Junctions Delta, T∆

Thermocouple Cold-Junction, TC

User Registers:

Sensor Configuration

Digital

Filter

Thermocouple

Type

Selection

Device Resolution & 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

I2C Module

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