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MSPM0G3519: MSPM0G3519 and MSPM0G3218: Information regarding sampling capacitor in ADC circuit

Khanh Doan
Intellectual 300 points

Part Number: MSPM0G3519
Other Parts Discussed in Thread: MSPM0G3218

Hi Ti Team,

Currently I'm working on MSPM0G3519 and MSPM0G3218 for my project. I found this circuit diagram in chapter 7.13 (MSPM0G3218) and 7.12.4 (MSPM0G3519)

My question is, do all analog pin connect to one sampling capacitor only (All A0 and A1 analog channel will use/share the same sampling capacitor). Or each analog pin will contain one sampling capacitor separatedly ?

Is this applied the same for MSPM0G3218

  • +1
    TI__Genius 13255 points

    Hi Khanh,

    For the capacitor C_I, it is the input capacitor for all the IOs, each IO has their own C_I (although they has the same typical value according to datasheet).

    For the capacitor C_S/H, it is the spec for ADC Model, and all the ADC channels share the same C_S/H sampling capacitor.