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Transfer Function of Various On-Chip Sensors

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Temperature Sensor

The UltraScale based SYSMON has on-chip temperature sensor, which produces the  equivalent output voltage proportionate to the die temperature. The ADC can be  configured to use external as well as internal reference voltage for temperature  conversion. When using an external reference voltage, the transfer function of the  temperature sensor is as given by (16.1). ADC value corresponding to a given temperature can also be obtained by the same equation:


image.png

where:

Bipolar transfer function of SYSMON ADC.png

T=Temperature K (Kelvin) 

When using the on-chip reference voltage, the transfer function for temperature  sensor is as shown by (16.2):

image.png

Power Supply Sensors

The SYSMON also includes on-chip sensors that allow monitoring of the device  power supply voltages using the ADC. The sensors sample and attenuate the power  supply voltages VUSER [3:0], VCCINT, VCCAUX, VCC_PSINTLP, VCC_PSINTFP, VCC_PSAUX, and

VCCBRAM on the package power supply balls. Equation (16.3) gives the power supply  sensor transfer function after digitizing by the ADC. The power supply sensor can  be used to measure voltages in the range 0 V to VCCAUX +3% with a resolution of  approximately 2.93 mV. The equation transfer function is related to the HP (High  Performance) IO banks. The power supply measurement results are stored in the  respective Status Registers:

image.png


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