Dual remote and local 1.2V logic-compatible temperature sensor with N-factor and series-R correction

The TMP4719 device is a high-accuracy 0.8°C temperature sensor with one local

integrated sensor and two remote temperature sensor channels that can be connected

to diode-connected transistors, such as the popular MMBT3904 NPN transistor, to

replace traditional thermistors or thermocouples. The remote channels 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 TMP4719 supports series resistance cancellation, programmable ideality

factor (η-factor), configurable temperature limits, and programmable digital filters

to improve the noise immunity and provide a robust design for complex thermal

environment monitoring applications. The device supports I2C and SMBus

communication with logic levels down to 1.2V regardless of the main supply rail,

enabling interoperability with low-voltage MCUs without needing a secondary

low-voltage supply or a bus level shifter.