SLAAE93 February   2023 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3106 , MSPM0G3107 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507 , MSPM0L1105 , MSPM0L1106 , MSPM0L1303 , MSPM0L1304 , MSPM0L1304-Q1 , MSPM0L1305 , MSPM0L1305-Q1 , MSPM0L1306 , MSPM0L1306-Q1 , MSPM0L1343 , MSPM0L1344 , MSPM0L1345 , MSPM0L1346

 

  1.   Trademarks
  2. 1MSPM0 Family Overview
  3. 2MSPM0 Main Analog Features
    1. 2.1 Best-in-Class 12-Bit ADC Integrated
    2. 2.2 Dual Mode Comparator With Reference DAC
    3. 2.3 Buffered 12-Bit 1-Msps DAC
    4. 2.4 Zero-Drift and Zero-Crossover Chopper OPA
  4. 3Easily and Flexibly Create the System With MSPM0 Analog Peripherals
    1. 3.1 ADC Sample and Conversion
    2. 3.2 Differential and Cascade OPA Configurations
    3. 3.3 Window Comparator Mode
    4. 3.4 Internal Connections Between Different Analog Peripherals
  5. 4Analog Comparison With STM32
  6. 5References

3.1 ADC Sample and Conversion

The sample-and-hold time determines how long to sample a signal before digital conversion. During the sample stage, an internal switch allows the input capacitor to be charged. The time required to fully charge the capacitor depends on the external capacitor to the ADC input pin. #FIG_SNT_KKP_VVB shows a model of the MSPM0 ADC.

Figure 3-1 ADC Connection Diagram

The values of the ADC input impedance Rin and sample-and-hold capacitance CS/H can be found in the ADC Electrical Characteristics section of the device-specific data sheet. The values of the IO input capacitance Cin can be found in the Digital IO Electrical Characteristics section of the device-specific data sheet. The functions of Rpar and Cpar|CI in front of the ADC model are to provide a path for the charge injection and do some filtering between Vin and the ADC model. CI is only specifically for IO input capacitance and is considered as a part of the RC filter.