온도 알람 모듈 -PTMP4718
(TEMP ALARM CLICK)
개요
- 본 제품은 온도 알람 모듈 -PTMP4718입니다.
- PTMP4718 칩을 기반으로 디자인된 제품으로 핀으로 프로그래밍 가능한 알람 스레쉬홀드를 지원합니다.
- 온도를 설정하고 알람을 받을 수 있습니다.
특징
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HOW DOES IT WORK?
Temp Alert Click is based on the PTMP4718, a high-accuracy remote and local temperature sensor from Texas Instruments. It has 1°C accuracy for both the local and the remote channels. The resolution is better for the remote channel (0.125°C compared to the local 1°C). The sensor has a remote diode fault detection, low power consumption, programmable alert limits, and series resistance cancellation. Depending on the application, it can work in an interrupt or comparator mode. In both modes, the alert is asserted at the end of a conversion cycle if the measured temperature exceeds a High Alert Limit or goes below a Low Alert Limit defined in the limit thresholds. It can also work in a shutdown and a continuous conversion mode.
The local temperature resolution is 8-bit in a -40 to 125°C range. The remote temperature accuracy is 11-bit at -55 to 125°C and optimized for a diode-connected MMBT3904 transistor. Temp Alert Click is equipped with this NPN switching transistor from NXP Semiconductor that acts as a remote temperature sensor. There are DN and DP connectors as positive and negative connections for remote sensors. If you do not intend to use the remote temperature sensors at all, you should connect those DP and DN. In case of noise, you can add a 470pF capacitor between DP and DN pins.
Temp Alert Click uses a standard 2-Wire U2C interface to communicate with the host MCU, supporting clock frequencies of up to 1MHz. The critical TCR pin will alert the critical temperature, with a threshold set by two 2K resistors to 77°C. According to a datasheet table, you can set this value by replacing the resistors to up to 125°C. The critical temperature is considered when the temperature exceeds the high or low alert limits. The alert ALR pin is asserted when those temperatures reach the limits. The visual presentation of those two conditions is presented over the NC7WZ14, a Schmitt trigger from ON Semiconductor, which turns ON the T CRIT and ALERT red LEDs.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this 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 development of rack server motherboards, smart network interface cards, small cell base stations, standard notebook PCs, software-defined radios, and more On-board modules PTMP4718 - high-accuracy remote and local temperature sensor from Texas Instruments Key Features Wide temperature operating range, remote and local temperature channels, low power consumption, remote diode fault detection, programmable alert, and temperature critical limits, onboard NPN transistor for remote temperature channel, positive, and negative connectors for remote temperature sensor, and more Interface I2C ClickID Yes Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V