Thermo 21 Click Board™

Product Code: MIKROE-4879

How Does The Thermo 21 Click Board™ Work? The Thermo 21 Click Board™ as its foundation uses the ADT7301, a high-precision digital temperature sensor from Analog Devices. This temperature sensor is characterized by high accuracy; temperature range of 0°C to +70°C provides typical ±0.5°C accuracy. It contains a band-gap temperature sensor and a 13-bit ADC to monitor and digitize the temperature reading to a resolution of 0.03125°C. Wide supply voltage range, low supply current, and SPI-compatible interface make it ideal for various applications, including process control, environmental monitoring, domestic appliances, and many more. The ADT7301 is a 13-bit digital sensor with a 14th bit that acts as a sign bit. The internal ADC section of the ADT7301 consists of a conventional successive approximation converter based around a capacitor DAC. The on-chip temperature sensor allows an accurate measurement of the ambient device temperature, where the specified measurement range is −40°C to +150°C.

It is unrecommended to operate the device at temperatures above +120°C because exposure beyond this limit affects device reliability. The Thermo 21 Click Board™ communicates with MCU through a standard SPI interface to program the internal registers for complete control of the ADT7301. It is compatible with SPI, QSPI, and MICROWIRE protocols as well as DSPs. The ADT7301 can be placed into Shutdown mode via the control register, which means that the on-chip oscillator is shut down, and no further conversions are initiated until the ADT7301 is taken out of Shutdown mode. The Thermo 21 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the SPI communication lines properly. However, the Click board™ comes equipped with a library that contains easy-to-use functions and an example code that can be used, as a reference, for further development. SPECIFICATIONS Type Temperature & humidity Applications Can be used for process control, environmental monitoring, domestic appliances, electronic test equipment, or other temperature measurement applications On-board modules ADT7301 - high-precision digital temperature sensor from Analog Devices Key Features Low power consumption, high precission and accuracy, 13-bit temperature-to-digital converter, 0.03125°C temperature resolution, SPI compatible serial interface, Shutdown mode, and more Interface SPI Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V PINOUT DIAGRAM This table shows how the pinout on the Thermo 21 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 NC SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC SPI Data OUT SDO 5 MISO SCL 12 NC SPI Data IN SDI 6 MOSI SDA 11 NC Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JP1 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V THERMO 21 CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Supply Voltage 3.3 - 5 V Accuracy - ±0.5 -