1.1.3 Analog and Digital Signals

The dsPIC33AK512MPS506 DP PIM ensures good signal integrity and provides all signals necessary to control a power stage. These signals are divided into two main sections: Analog, marked with A and Digital, marked with D (see Figure 1-1).

1. Analog Section

   The analog section is located at the left connector side (smaller section in Figure 1-1). It consists of 17 signals, all referenced to analog ground. These lines are split into two subsections:

   • High-Speed Comparator Inputs: RC filtered with a corner frequency of 10 MHz and maximum signal rise/fall time of 33 ns. These lines are designed to be used with on-chip comparators for multiple applications such as zero-cross detection, Peak Current Mode (PCMC) and more.
   • High-Speed ADC Inputs: RC filtered with a corner frequency of 1.9 MHz and maximum signal rise/fall time of 180 ns. These lines are connected to the Track-and-Hold (T&H) circuitry of the dedicated ADC inputs.
2. Digital Section

   The digital section is located at the right connector side (larger section in Figure 1-1). It consists of 31 signals, all referenced to digital ground. These lines are split into four subsections:

   • High-Speed PWM Outputs: Each line has a 47Ω series resistance.
   • GPIO: Each line has a 47Ω series resistance.
   • Programing/Debugging Lines: Each line has a 47Ω series resistance.
   • Communication Lines (I²C): Each line has a 47Ω series resistance.