1 Features

• Supply range: 1.62V to 5.5V

• Wide operating range: –40°C to 125°C

• Remote channel accuracy: 0.8°C

– Resolution: 12-bit (0.0625°C)

• Local channel accuracy: 1°C

– Resolution: 8-bit (1°C)

• Support I2C and SMBus interface

• Low power consumption

• Additional features for improved temperature

measurement accuracy:

– Diode non-ideality factor (η-factor) correction

– Series resistance cancellation

– Programmable digital filter

• Remote diode fault detection

• 1.2V logic-compatible input thresholds

independent of supply

• Footprint compatible with the TMP432

2 Applications

• Standard notebook PC

• Rack server motherboard

• Smart network interface card (NIC)

• Small cell base station

• Baseband unit (BBU)

• Software-defined radio

3 Description

The TMP4719 device is a high-accuracy 1°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 non-ideality factor

(η-factor), configurable temperature limits, and

programmable digital filters to improve the noise

immunity of the device 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.