TMP4718

The TMP4718 is a high accuracy 1°C temperature sensor with one local integrated sensor and a remote temperature sensor input that can be connected to a diode-connected transistor, such as the popular MMBT3904 NPN transistor, to replace traditional thermistors or thermocouples. The remote input can also be connected to a substrate thermal transistor or diode integrated inside microprocessors, microcontrollers, or FPGAs to monitor the die temperature of the IC.

The TMP4718 supports I2C and SMBus communication with logic levels down to 0.8V regardless of main supply rail. This enables interoperability with low voltage 1.2V MCUs without needing a secondary low voltage supply. The TMP4718 includes the Series Resistance Cancellation feature to automatically eliminate temperature errors caused by series resistance of up to 1 kΩ, allowing for greater flexibility routing to thermal diodes. The programmable offset feature allows the device to report offset-adjusted temperature data based on pre-calibrated data in specific user environments. Measurements can be done automatically with programmable conversion period, or with one-shot conversion triggered by an I 2C command.

The TMP4718A and TMP4718B offer the same function but different SMBus or I 2C device addresses. This allows the system to support two sensors on the same bus.