Thermo 29 Click Board™

Product Code: MIKROE-5586

How Does The Thermo 29 Click Board™ Work? The Thermo 29 Click Board™ is based on the TMP126, a digital output temperature sensor from Texas Instruments with increased reliability and improved accuracy specifications optimal for thermal management and protection applications. The TMP126 consists of an internal thermal BJT (factory calibrated on a NIST traceable setup), a high-resolution analog-to-digital converter (ADC), a data processing circuit, and serial interface logic functions in one package. The voltage is digitized and converted to a 14-bit temperature result in degrees Celsius, giving a fully calibrated digital output with outstanding accuracy of up to ±0.25°C and temperature resolution of 0.03125°C per LSB, typical over a temperature range of 20°C to 30°C. This Click board™ communicates with MCU using a 3-wire SPI-compatible interface with a maximum frequency of 10MHz, for data transfer and configuration of the TMP126. Using the Mode bit in the configuration register, the TMP126 can be configured to operate in various conversion modes, including continuous, one-shot, and shutdown modes.

These modes provide flexibility to use the board in the most power-efficient way necessary for the intended application. The TMP126 also includes advanced features for increased reliability in harsh environments. These include an optional CRC checksum for data integrity, programmable alert limits, a temperature slew rate warning, and an enhanced operating temperature range. An alarm (interrupt) signal, marked as ALR and routed to the interrupt pin of the mikroBUS™ socket, is alarming when a specific temperature event occurs that depends on the value of the temperature reading relative to programmable limits. In addition to the ALR pin, this function can be visually identified by a red LED marked as ALERT. The Thermo 29 Click Board™ can operate with either 3.3V or 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 communication lines properly. However, the Click board™ comes equipped with a library containing 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 the thermal management of portable electronics and industrial, consumer, and environmental applications On-board modules TMP126 - digital output temperature sensor from Texas Instruments Key Features High accuracy, broad temperature range, high resolution, SPI interface, fast measurement intervals with no self-heating, advanced features for increased reliability, programmable alert, factory-calibrated, low power consumption, and more Interface SPI Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the pinout on Thermo 29 Click 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 ALR Alert Interrupt 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 LD2 ALERT - Alert LED Indicator JP1 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position