TIDUEO0C July 2019 – March 2021
Predictive maintenance of smart meters is one of the main topics which is addressed in the TIDA-01546 design, and it is becoming more relevant for many other IoT applications, such as battery-powered sensor nodes.
The TIDA-01546 reference design is designed to accurately monitor the battery health of non-rechargeable lithium batteries and detect any overcurrent conditions in the system. The TM4C1294 MCU is programmed to control the BQ35100 gauge monitor and the ADS7142 sensor monitor. A microSD™ card inserted into the SD card slot can record the battery-monitoring data.
The system health monitoring section of the TIDA-01546 reference design monitors user definable overcurrent conditions during run time and is implemented with the ADS7142 current monitor and LPV521 operational amplifier. The host MCU (TM4C1294) communicates through the I2C interface with the ADS7142 device, which has a digital window comparator with a dedicated ALERT output pin for interrupting the host when the software-programmable high or low threshold is crossed.