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MSP430F247: MSP430F247 ADC LSB Spec

Jaime C
Intellectual 990 points
Part Number: MSP430F247

Hi team, 

Questions from my customer 

One of the significant error sources in their design is the ADC Integral Linearity Error of +/-1.7 LSBs maximum. Could you provide more details regarding the +/-1.7 LSB specification:

  1. The +/-1.7LSB spec is a maximum. Is there a typical value available?
  2. The +/-1.7LSB spec is valid over the full operating temperature of -40C to 85C. What would the spec be at 0C to 50C?
  3. The spec is defined at Vcc = 2.2V/3V. Their Vcc and Vavcc are both 3.3V, does this have any impact?
  4. The spec is defined at VeRef of 1.6V to Vavcc. Theyare using a VeRef of 3.0V, does this have any impact?

Thank you, 

Jaime

  • 0
    TI__Mastermind 32920 points

    Hi Jaime

    The total answer is that all the spec we can give is the datasheet. I am sorry. If the customer want to know the spec under 3.3V, I advice they can test by themselves. If you have any specific question, I am very happy to solve for you.

    1. The +/-1.7LSB spec is a maximum. Is there a typical value available?

      A: No.

    2. The +/-1.7LSB spec is valid over the full operating temperature of -40C to 85C. What would the spec be at 0C to 50C?

      A: I will say it is still in +/-1.7LSB. We don't give any other spec beyond our datasheet.

    3. The spec is defined at Vcc = 2.2V/3V. Their Vcc and Vavcc are both 3.3V, does this have any impact?

       A: We don't know. I have asked our System engineer, we don't have any data tested under 3.3V

            4. The spec is defined at VeRef of 1.6V to Vavcc. Theyare using a VeRef of 3.0V, does this have any impact?

      A: Same answer as the third question.

    Eason

  • 0
    TI__Mastermind 32920 points

    Hi Jaime,

    As we have moved the discussion to e-mail. I will close this thread.

    Eason

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