3 Remote Application Use Cases

There are three primary applications for a remote temperature sensor: measuring the temperature of the circuit board, measuring the temperature of nearby components, and measuring the temperature of integrated diodes for on-chip temperature readings. There are many integrated circuit components, such as FPGAs, ADCs, and other System On Chips (SoCs), that include diodes for temperature measurement within the product. TI remote temperature sensors connect directly to these diodes for accurate temperature readings. When there is a need to measure temperature for multiple locations around the board outside of SoCs, discrete BJT-based diodes can be used as external temperature sensing elements. Up to nine different locations can be measured with one single remote IC with the TMP9R00-SP. Using a single IC simplifies the design process by providing an integrated analog-digital converter to read all nine different locations. The remote temperature sensor can also be used only as a digital local temperature sensor. To do so, there is an option to short the D+ and D- pins together and not use the remote. A single temperature IC can be used to measure board temperature and other hot spots around the system. Examples of these applications are listed below for reference.

Figure 3-1 Remote Temperature Sensor Applications