MIKROE-2815

MIKROE-2815 Datasheet

PID MIKROE-2815

Part	Datasheet
MIKROE-2815	MIKROE-2815 (pdf)

PDF Datasheet Preview
RTD click PID MIKROE-2815 Weight 25 g RTD click is based on MAX31865 resistance to digital converter from Maxim Integrated, optimized for platinum resistance temperature detectors, or RTD. The click uses the PT100 type platinum probe for temperature measurement. There are four screw terminals on the board, so different PT100 probe types can be used with this design. This click board can work with 2, 3 or 4-wire PT100 probe types. RTD probes are commonly used to measure a range of temperatures between −200°C and 500°C, but the exact value depends on the specific probes used. Features like the 15bit ADC resolution, input terminals overvoltage protection up to ±45V, fault detection, fast response time of 21mS and the SPI interface, make the RTD click an ideal solution when it comes to precise measuring of extremely high and low temperatures. How the click works RTD sensors are basically thermosensitive resistors materials that change the resistance depending on their temperature. In this case, the resistor is a small strip of platinum with a resistance of at 0°C - that is why it is called PT100. The RTD measurement is more stable and precise than with most NTC/PTC thermistors, so it is commonly used for measuring temperature in the laboratory and industrial processes. Measurement probe is connected to the RTD click by using the screw terminals, and it has wires that can be 1m long, which makes possible to measure high temperatures from a safe distance. To successfully measure small differences in the sensor resistance, the signal must be amplified. There is an input signal amplifier before the ADC converter, inside the MAX 31865 IC. Once amplified, the signal goes through the ADC converter and then, this value can be then read through the SPI interface on the mikroBUS socket. Since the temperature vs resistance curve of the platinum probes is not ideal, a compensating calculation is done with the functions, contained in the click library. The 15bit ADC can provide the resolution of ±0.3125°C, but the total accuracy of the RTD click is ±0.5°C. The RTD click can work with several different variations of the RTD probes: • The probe connection can give acceptable results when the RTD is located close to the MAX31865. For the PT100 probes, the series resistance of causes an error of approximately 1°C. Therefore, as the cable length increases, the error due to cable resistance can become excessive. • The probe connection is a compromise that uses one less conductor than the solution. If the cable resistances are well matched, the error due to cable resistance is canceled. • The probe connection eliminates errors due to cable resistance by using separate force and sense leads. To select proper mode for the type of the connected probe, the SMD jumpers on the click board must be set to a proper position. The jumper settings can be found in the Onboard settings and indicators table, below. DRDY - Data ready pin is used to signal a ready status to the MCU. This pin will go to a LOW logic state when there is a new conversion result is available in the data register. When a read operation of an RTD resistance data register occurs, DRDY goes to a HIGH logic level. It can be used to trigger an interrupt on the MCU so that the polling of the temperature registers can be avoided. Specifications Type Temperature Measuring a wide range of temperatures in hard to reach places and in hazardous conditions. modules RTD click uses Maxim Integrated MAX31865 15bit resistance to digital converter, optimized for platinum resistance temperature detectors RTD RTD click can be equipped 2, 3 or PT100 RTD probe, measuring wide range of Key Features temperatures with the accuracy of ±0.5°C, ±45V overvoltage protection, fast measurement data processing of 21mS, DRDY pin for interrupt triggering... Interface GPIO,SPI Input Voltage 3.3V Click board size M x mm Pinout diagram This table shows how the pinout on RTD click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns . Notes Notes SPI chip select NC 1 AN NC 2 RST CS 3 CS PWM INT RX DRDY output SPI clock SCK 4 SCK SPI slave data out MISO 5 MISO SCL SPI slave data in MOSI 6 MOSI SDA Power supply 3.3V 7 3.3V 5V Ground

PDF Datasheet Preview

RTD click

PID MIKROE-2815

Weight 25 g

RTD click is based on MAX31865 resistance to digital converter from Maxim Integrated, optimized for platinum resistance temperature detectors, or RTD. The click uses the PT100 type platinum probe for temperature measurement. There are four screw terminals on the board, so different PT100 probe types can be used with this design. This click board can work with 2, 3 or 4-wire PT100 probe types.

RTD probes are commonly used to measure a range of temperatures between −200°C and 500°C, but the exact value depends on the specific probes used. Features like the 15bit ADC resolution, input terminals overvoltage protection up to ±45V, fault detection, fast response time of 21mS and the SPI interface, make the RTD click an ideal solution when it comes to precise measuring of extremely high and low temperatures.

How the click works RTD sensors are basically thermosensitive resistors materials that change the resistance depending on their temperature. In this case, the resistor is a small strip of platinum with a resistance of at 0°C - that is why it is called PT100. The RTD measurement is more stable and precise than with most NTC/PTC thermistors, so it is commonly used for measuring temperature in the laboratory and industrial processes.

Measurement probe is connected to the RTD click by using the screw terminals, and it has wires that can be 1m long, which makes possible to measure high temperatures from a safe distance. To successfully measure small differences in the sensor resistance, the signal must be amplified. There is an input signal amplifier before the ADC converter, inside the MAX 31865 IC. Once amplified, the signal goes through the ADC converter and then, this value can be then read through the SPI interface on the mikroBUS socket. Since the temperature vs resistance curve of the platinum probes is not ideal, a compensating calculation is done with the functions, contained in the click library. The 15bit ADC can provide the resolution of ±0.3125°C, but the total accuracy of the RTD click is ±0.5°C. The RTD click can work with several different variations of the RTD probes:
• The probe connection can give acceptable results when the RTD is located close to the MAX31865. For the PT100 probes, the series resistance of causes an error of approximately 1°C. Therefore, as the cable length increases, the error due to cable resistance can become excessive.
• The probe connection is a compromise that uses one less conductor than the solution. If the cable resistances are well matched, the error due to cable resistance is canceled.
• The probe connection eliminates errors due to cable resistance by using separate force and sense leads.

To select proper mode for the type of the connected probe, the SMD jumpers on the click board must be set to a proper position. The jumper settings can be found in the Onboard settings and indicators table, below.

DRDY - Data ready pin is used to signal a ready status to the MCU. This pin will go to a LOW logic state when there is a new conversion result is available in the data register. When a read operation of an RTD resistance data register occurs, DRDY goes to a HIGH logic level. It can be used to trigger an interrupt on the MCU so that the polling of the temperature registers can be avoided.

Specifications

Type

Temperature

Measuring a wide range of temperatures in hard to reach places and in hazardous conditions.
modules

RTD click uses Maxim Integrated MAX31865 15bit resistance to digital converter, optimized for platinum resistance temperature detectors RTD

RTD click can be equipped 2, 3 or PT100 RTD probe, measuring wide range of Key Features temperatures with the accuracy of ±0.5°C, ±45V overvoltage protection, fast
measurement data processing of 21mS, DRDY pin for interrupt triggering...

Interface

GPIO,SPI

Input Voltage 3.3V

Click board
size

M x mm

Pinout diagram

This table shows how the pinout on RTD click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns .

Notes

Notes

SPI chip select

NC 1 AN NC 2 RST CS 3 CS

PWM INT RX

DRDY
output

SPI clock

SCK 4 SCK

SPI slave data out MISO 5 MISO SCL

SPI slave data in MOSI 6 MOSI SDA

Power supply 3.3V 7 3.3V 5V

Ground

More datasheets: IDT5V995PFGI | LPV-150-48 | LPV-150-36 | LPV-150-12 | LPV-150-15 | LPVL-150-24 | LPVL-150-12 | LPV-150-24 | DAMM15PF225 | DCMAT37SA197

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MIKROE-2815 Datasheet file may be downloaded here without warranties.

Datasheet ID: MIKROE-2815 649443