JAJSKM1C october 2019 – september 2021 UCC5870-Q1
PRODUCTION DATA
The ADC is enabled/disabled with SPI communication to CFG7[ADC[ADC_EN] (CFG7). The 6 AI inputs as well as the die junction temperature are selectable to measure with the ADC. Additionally, the channels are selectable as to when it is samples with respect to the INP switching cycle. Use the ADCCFG[ADC_ON_CH_SEL_*] bits (ADCCFG) to select the channels to be measured while INP is high. The sampling order for the PWM ON cycle round robin is: AI1, AI3, AI5, AI2, AI4, AI6, Die Temp. Use the ADCCFG[ADC_OFF_CH_SEL_*] bits () to select the channels to be measured while INP is low. Use the CFG7[ADC_SAMP_MODE] bits (ADCCFG) to select one of 3 sampling modes for the ADC. Three modes are available to ensure the least amount of switching noise in the measurement. The three modes are Center Aligned mode (CFG7[ADC_SAMP_MODE]=0b00), where each selected channel is sampled in the center of the ON/OFF time of the INP input (depending on the setting), Edge Mode (CFG7[ADC_SAMP_MODE] = 0b01), where the ADC conversions begin after rising or falling edge (depending on the setting), and Hybrid mode (CFG7[ADC_SAMP_MODE] = 0b10), which is a combination of both modes. The maximum INP frequency supported in order to get at least one full ADC conversion per PWM cycle is 30kHz.