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10.5. Temperature Sensing Diode
The Cyclone® 10 GX temperature sensing diode (TSD) uses the characteristics of a PN junction diode to determine die temperature. Knowing the junction temperature is crucial for thermal management. You can calculate junction temperature using ambient or case temperature, junction-to-ambient (ja) or junction-to-case (jc) thermal resistance, and device power consumption.
An Cyclone® 10 GX device monitors its die temperature with the internal TSD with built-in ADC circuitry or the external TSD with an external temperature sensor. This allows you to control the air flow to the device.
Feature | Internal Sensor | External TSD |
---|---|---|
Temperature sensing | Uses the built-in ADC to sample the on-chip temperature | Interfaces the TSD with an external temperature sensing chip |
Readout access | Through the Temperature Sensor Intel® FPGA IP | From the external temperature sensing chip |
Operation availability | When the device is in user mode | When the device is in user mode or off |