Grove I2C Thermocouple Amplifier (MCP9600) Datasheet by Seeed Technology Co., Ltd

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Grove - I2C Thermocouple Amplifier

(MCP9600)

The Grove - I2C Thermocouple Amplifier (MCP9600) is a thermocouple-to-digital

converter with integrated cold-junction and I2C communication protocol. This module is

designed to be used in conjunction with a k-type thermocouple. The thermocouples

have a much larger measurement range than thermistors. For example, this k-type

thermocouple on our website has a measurement range of -50 to +600.

We also provide the alert function for this module, you can use the progarammable alert

pin to provide an interrupt signal to the controller.

Again, this module can't work alone, it must work with a k-type thermocouple, if you do

not have one, you can consider Thermocouple Temperature Sensor K Type-1M in our

bazaar.

Note The Grove - IZC Thermocouple Ampliﬁer (MCPQGOO) do support Type K, J, T, N, S, E, B and R on hardware, however, at present, our library do not support any other kind of thermocouple except K type. If you have any needs in this regard, please contact our

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Features

 Integrated Cold-Junction Compensation

 Supported Types (designated by NIST ITS-90): Type K, J, T, N, S, E, B and R

 Four Programmable Temperature Alert Outputs:

 Monitor Hot- or Cold-Junction

 temperatures

 Detect rising or falling temperatures

 Up to 255°C of Programmable Hysteresis

 Programmable Digital Filter for Temperature

 Low Power

Note

The Grove - I2C Thermocouple Amplifier (MCP9600) do support Type K, J, T, N, S, E,

B and R on hardware, however, at present, our library do not support any other kind of

thermocouple except K type. If you have any needs in this regard, please contact our

email: techsupport@seeed.cc.

Specification

Item Value

OperatingVoltage3.3V/5V

AmbientTemperature‐40~+125

StorageTemperature‐65~+150

Max.JunctionTemperature+150

Hot‐JunctionAccuracy±1.5°C(Max.)

MeasurementResolutionHotandCold‐Junctions:0.0625°C(typical)

InterfaceI2C

I2CAddress0x60(default)/0x67(optional)

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[2: 9x60 lh-vmuupll mm 0009 0 GND: connect this module to the system GND 0 T 7: Thermocouple lnpuL negative pole . VCC: you can use 5V or 3.3V for this module 0 T +: Thermocouple Input positive pole SDA: IZC sefial data . SCL: IZC serial clock a’u

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Applications

 Petrochemical Thermal Management

 Hand-Held Measurement Equipment

 Industrial Equipment Thermal Management

 Ovens

 Industrial Engine Thermal Monitor

 Temperature Detection Racks

Hardware Overview

Pin Map

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Schematic

Power

The operating voltage range of MCP9600 is 2.7V ~ 5.5V, we use a power conversion

chip XC6206P332MR-G to provide a stable 3.3V for the MCP9600.

Input Jack

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Because of the small signal levels involved, we take a lot measures to filter the noise.

 1--L1,L2 We use thermocouple up to 1 meter long. Such long wires can be

regarded as antennas, which will receive spatial electric field interference and

generate high frequency noise. So we use two inductances to filter the high

frequency noise.

 2--C1 It is strongly recommended by the chip manufacturer to add a 100nF ceramic

surfacemount differential capacitor, placed across the T+ and T- pins, in order to

filter noise on the thermocouple lines.

 3--D1 We use the SZNUP2105LT3G DUAL BIDIRECTIONAL VOLTAGE

SUPPRESSOR to protect this module from ESD(Electro-Static discharge).

Bi-directional level shifter circuit

This is a typical Bi-directional level shifter circuit to connect two different voltage section

of an I2C bus. The I2C bus of this sensor use 3.3V, if the I2C bus of the Arduino use 5V,

this circuit will be needed. In the schematic above, Q1 and Q5 are N-Channel

MOSFET 2N7002A, which act as a bidirectional switch. In order to better understand

this part, you can refer to the AN10441

Platforms Supported

Arduino RaspberryPiBeagleBoneWioLinkItONE

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Caution The platforms mentioned above as supported islare an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software Note 1 Please plug the USB cable gently, otherwise you may damage the port. Please use the USB cable with 4 wires inside, the 2 wires cable can‘t transfer data. If you are not sure about the wire you have, you can click here to buy 2 Each Grove module comes with a Grove cable when you buy. In case you lose the

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Caution

The platforms mentioned above as supported is/are an indication of the module's

hardware or theoritical compatibility. We only provide software library or code examples

for Arduino platform in most cases. It is not possible to provide software library / demo

code for all possible MCU platforms. Hence, users have to write their own software

library.

Getting Started

Play With Arduino

Hardware

Materials required

SeeeduinoV4.2 BaseShieldGrove‐I2CThermocoupleAmplifier

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Note

1 Please plug the USB cable gently, otherwise you may damage the port. Please use

the USB cable with 4 wires inside, the 2 wires cable can't transfer data. If you are not

sure about the wire you have, you can click here to buy

2 Each Grove module comes with a Grove cable when you buy. In case you lose the

Grove cable, you can click here to buy.

 Step 1. Connect the Grove - I2C Thermocouple Amplifier (MCP9600) to port I2C of

Grove-Base Shield.

 Step 2. Plug Grove - Base Shield into Seeeduino.

 Step 3. Connect Seeeduino to PC via a USB cable.

Note If we don't have Grove Base Shield, We also can directly connect this module to Note If this is the ﬁrst time you work with Arduino, we strongly recommend you to see Getting

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Note

If we don't have Grove Base Shield, We also can directly connect this module to

Seeeduino as below.

Seeeduino GroveCableGrove‐I2CThermocoupleAmplifier

GNDBlackGND

5V/3.3VRedVCC

SDAWhiteSDA

SCLYellowSDA

Software

Note

If this is the first time you work with Arduino, we strongly recommend you to see Getting

Started with Arduinobefore the start.

 Step 1. Download the Seeed_MCP9600 Library from Github.

 Step 2. Refer to How to install library to install library for Arduino.

 Step 3. Restart the Arduino IDE. Open the example, you can open it in the following

three ways：

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a. Open it directly in the Arduino IDE via the path: File → Examples → Grove

Temperature sensor MCP9600 → MCP9600_4channel_INT_demo.

b. Open it in your computer by click

the MCP9600_4channel_INT_demo.ino which you can find in the

folder XXXX\Arduino\libraries\Seeed_MCP9600-

master\examples\MCP9600_4channel_INT_demo, XXXX is the location you

installed the Arduino

IDE.

c. Or, you can just click the icon in upper right corner of the code block to copy

the following code into a new sketch in the Arduino IDE.

#include "Seeed_MCP9600.h"

#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE

#define SERIAL SerialUSB

#else

#define SERIAL Serial

#endif

MCP9600 sensor;

/**@brief interruption cfg.

* */

err_t sensor_INT_config()

{

err_t ret=NO_ERROR;

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CHECK_RESULT(ret,sensor.set_filt_coefficients(FILT_MID));

for(int i=0;i<4;i++)

{

/*Conver temp num to 16bit data*/

CHECK_RESULT(ret,sensor.set_alert_limit(i,sensor.covert_temp_to_reg_form(28+i)));

/*Set hysteresis.for example,set hysteresis to 2,when the INT limitation is 30,interruption will

be generated when

the temp ecceed limitation,and the interruption flag will stay unless the temp below 30-

2(limitation-hysteresis) 28. */

CHECK_RESULT(ret,sensor.set_alert_hys(i,2));

/*Set when interruption generated the pin's status*/

CHECK_RESULT(ret,sensor.set_alert_bit(i,ACTIVE_LOW));

CHECK_RESULT(ret,sensor.clear_int_flag(i));

/*default is comparator mode*/

CHECK_RESULT(ret,sensor.set_alert_mode_bit(i,COMPARE_MODE));

/*Set alert pin ENABLE.*/

CHECK_RESULT(ret,sensor.set_alert_enable(i,ENABLE));

}

/*device cfg*/

CHECK_RESULT(ret,sensor.set_cold_junc_resolution(COLD_JUNC_RESOLUTION_0_25));

CHECK_RESULT(ret,sensor.set_ADC_meas_resolution(ADC_14BIT_RESOLUTION));

CHECK_RESULT(ret,sensor.set_burst_mode_samp(BURST_32_SAMPLE));

CHECK_RESULT(ret,sensor.set_sensor_mode(NORMAL_OPERATION));

return NO_ERROR;

}

err_t get_temperature(float *value)

{

err_t ret=NO_ERROR;

float hot_junc=0;

float junc_delta=0;

float cold_junc=0;

bool stat=true;

CHECK_RESULT(ret,sensor.check_data_update(&stat));

if(stat)

{

CHECK_RESULT(ret,sensor.read_hot_junc(&hot_junc));

CHECK_RESULT(ret,sensor.read_junc_temp_delta(&junc_delta));

CHECK_RESULT(ret,sensor.read_cold_junc(&cold_junc));

*value=hot_junc;

}

else

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{

SERIAL.println("data not ready!!");

}

return NO_ERROR;

}

void setup()

{

SERIAL.begin(115200);

delay(10);

SERIAL.println("serial start!!");

if(sensor.init(THER_TYPE_K))

{

SERIAL.println("sensor init failed!!");

}

sensor_INT_config();

}

void loop()

{

float temp=0;

u8 byte=0;

u8 stat=0;

get_temperature(&temp);

SERIAL.print("temperature ==============================>>");

SERIAL.println(temp);

sensor.read_INT_stat(&stat);

SERIAL.println(" ");

delay(1000);

}

Note

There are 2 demos in the library:

MCP9600_basic_demo.ino

This example is a sample use of temperature sensor,you need to polling for data.

MCP9600_4channel_INT_demo.ino

here are four alert pads on the sensor module which connect to alert pin.You can set

temperature limits by calling the API we provided.The alert pin outputs low when the

temperature value beyond limit.You can attach alert pin to a interrupt pin of host,To

improve the efficiency of program operation.

| Shift M Success If every thing goes well, when you open the Serial Monitor, you will see the temperature

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 Step 4. Upload the demo. If you do not know how to upload the code, please

check How to upload code.

 Step 5. Open the Serial Monitor of Arduino IDE by click Tool-> Serial Monitor. Or

tap the Ctrl +Shift +M key at the same time. Set the baud rate to 115200.

Success

If every thing goes well, when you open the Serial Monitor, you will see the temperature

value and the alert information.

serial start!!

version =4011

temperature ==============================>>25.81

temperature ==============================>>27.62

temperature ==============================>>29.37