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TMS320F28379D: About F28379_180controlCARD pcb schematic

user6158327
Intellectual 280 points
Part Number: TMS320F28379D

Hi,

I have some questions about the F28379_180controlCARD PCB schematic.

The value of R51 - R54 is 100m, but it is not known whether 100m is 0.1 ohm or 1000000 ohms.

And what is the role of R51-R54 and C14-C17 (I know the 16-bit AD needs to use the 22 uF capacitor)?

F28379_180controlCARD_R1_3_SCH_02Oct2015.pdf

  • 0
    TI__Mastermind 42065 points

    user6158327,

    'm' means milli or .1 ohm, 'M' means mega or 100,000,000 ohms. This schematic is using a 0.100 ohm resistor.

    The 100m ohm resistor was chosen to because of the characteristics of the op-amp. This helps reduce ringing and ensures that the op-amp will remain stable despite the 22uF capacitor requirement for 16-bit operation . If you do not use 16 bit mode, the capacator, resistor and op-amp can all be reduced,removed, or changed.

    Regards,
    Cody