8.3.4.3 DIE Temperature ADC Measurement

To get maximum accuracy, an independent ADC (DIE temperature ADC) is used to measure the BQ79606A-Q1 die temperature. A die temperature reading is taken simultaneously with the cell measurements and used to correct the other ADC results for temperature variations in the die. To ensure the most accurate results, a cell ADC conversion must be done whenever an auxiliary ADC conversion is done to ensure the most recent temperature conversion is obtained. Otherwise, the last temperature result is used in the correction and may not be valid.

The junction temperature of the die is measured with every cell conversion (using CELL ADC). The reported result in the DIE_TEMPL and DIE_TEMPH registers is the voltage from the temperature sensor. Similar to the voltages, the value in DIE_TEMP* is in 2's complement format. The die temperature is calculated using the equation listed in Table 4