Why the Intel MAX 10 FPGA temperature sensing diode (TSD) reading exceeded the device datasheet specification?

Description

The temperature reading from the Inte® MAX® 10 FPGA analog-to-digital converter (ADC) temperature sensing diode (TSD) channel exceeded device datasheet specification of /- 5^oC for Intel MAX 10 FPGA Dual Supply device and /-10^oC for Intel MAX 10 FPGA  Single Supply device. The inaccurate TSD reading is due to an ADC intellectual property (IP) bug.

Resolution

This problem will be fixed in a future release of the Intel® Quartus® Prime Software version.