SBOA542 November 2022 TMP1826 , TMP1827
The TMP1826 and TMP1827 devices are part of the TI portfolio of high-accuracy, single-wire compatible digital output temperature sensors. The TMP182x devices simplify applications by providing a true single-wire bus-powered mode of operation, with multi-drop capability, thereby reducing the requirement for bulky cables and complex routing on space-constrained PCBs. With the dual-bus speed mode and seamless switching between the modes, the single-wire is designed for both short- and long-distance applications, enabling customers to scale their applications with minimal software updates. Because the interface is different from traditional inter-integrated circuit (I2C), universal asynchronous receiver and transmitter (UART), and serial-peripheral interfaces (SPI), this application note provides both design and software references, so that customers can implement the bus protocol on their choice of MCUs using UART, SPI, and general-purpose input/output (GPIO) peripherals. The examples provided show the TMP1826 being interfaced via different interfaces, but the same is applicable to TMP1827 devices as well.