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TMS570LC4357: MibADC Operating Characteristics

Christopher TRITANT
Expert 1080 points
Part Number: TMS570LC4357

Hello,

We are using the ADC module in the TMS570LC4357.

In the datasheet section 7.4.3 (ADC Electrical and Timing Specifications), regarding the MibADC Operating Characteristics defined in the Table 7-22 and Table 7-23:

What is the meaning of parameters included in the tables and what is the purpose of these tables ? is there a figure dedicated to these parameters ?

Are these parameters "classic" for an ADC module ? or

Are they related to the Texas ADCs or Texas ADCs in the TMS570LC4357 ?

Best reagrds,

Christopher

  • 0
    TI__Guru**** 196756 points
    Hello Christopher,

    The table shows the ADC DC accuracy fro 10-bit mode and 12-bit mode. Many analog signals remains relatively static such as those from temperature sensors or voltage monitors. In such application, the absolute accuracy of the voltage measurement is important. THE ADC specifications that describe this type of accuracy are offset error, full-scale error, differential nonlinearity (DNL), and integral nonlinearity (INL). Those 4 values are included in Table 7-22/23, and depicted in Figures 7-11/12.

    The absolute error is the total DC measurement error which is depicted in Figure 7-13.

    What is classic parameters?
  • 0 in reply to QJ Wang
    Expert 1080 points
    Thanks for your first answer.
    To be more udnerstanding, my question is:
    Are these parameters "classic" for an ADC module or Are these parameters specifically related to the Texas ADCs or Texas ADCs in the TMS570LC4357 ?
  • 0 in reply to Christopher TRITANT
    TI__Guru**** 196756 points
    Hi Christopher,

    Those parameters (offset error, full-scale error, DNL, INL) are widely used to describe the ADC's absolute accuracy. They are used not only in TI's ADC specification.