Texas Instruments TMP4719 High-Accuracy Temperature Sensor
The Texas Instruments TMP4719 High-Accuracy Temperature Sensor features one local integrated sensor and two remote temperature sensor channels, which can be connected to diode-connected transistors to replace traditional thermistors or thermocouples. The remote channels can also be connected to a substrate thermal transistor or diode integrated into microprocessors, microcontrollers, or FPGAs to monitor the IC's die temperature.
The TI TMP4719 Sensor supports series resistance cancellation, programmable ideality factor (η-factor), configurable temperature limits, and programmable digital filters to enhance the noise immunity and supply a robust design for complex thermal environment monitoring applications. The device facilitates I2C and SMBus communication with logic levels down to 1.2V, regardless of the main supply rail, allowing interoperability with low-voltage MCUs without requiring a secondary low-voltage supply or a bus-level shifter.
Features
- 1.62V to 5.5V supply range
- -40°C to 125°C wide operating range
- 0.8°C remote channel accuracy
- 12-bit (0.0625°C) resolution
- 1°C local channel accuracy
- 8-bit (1°C) resolution
- Support I2C and SMBus interface
- Low power consumption
- Additional features for improved temperature measurement accuracy:
- Diode non-ideality factor (n-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
Applications
- Standard notebook PC
- Rack server motherboard
- Smart network interface card (NIC)
- Small cell base station
- Baseband unit (BBU)
- Software-defined radio
- FPGA temperature monitoring
Simplified Block Diagram
