SLAS986D November 2014 – February 2018 AMC7836
The AMC7836 includes high-limit and low-limit detection for the internal temperature sensor. Figure 56 shows the temperature detection block. The values in the LT upper and lower threshold registers (address 0x94 through 0x97) set the limits for the temperature sensor. The temperature sensor detector can issue either a high-alarm (LT-HIGH-ALR bit) or a low-alarm (LT-LOW-ALR bit) in the alarm status 1 register (address 0x71) depending on whether the high or low thresholds were exceeded. To implement single, upper-bound threshold detection for the temperature sensor, the host processor can set the upper-bound threshold to the desired value and the lower-bound threshold to the default value. For lower-bound threshold detection, the host processor can set the lower-bound threshold to the desired value and the upper-bound threshold to the default value.
In addition to the programmable threshold alarms the temperature sensor detection circuit also includes a die thermal-alarm flag which continuously monitors the die temperature. When the die temperatures exceeds 150˚C the die thermal alarm flag (THERM-ALR bit) in the alarm status 1 register (address 0x71) is set. The internal temperature sensor must be enabled for this alarm to be functional.