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ADS54J60: Calibration process

Nir Flysher
Expert 3367 points
Part Number: ADS54J60


Dear Team,

My customer is experiencing spurs in high temperature in in the ADS54J60.

Their input signal is AC Coupled. They're not freezing the calibration today.

They were looking into the calibration process and we wanted to understand how should we operate it.

Can you please describe the correct process for the ADS54J60 calibration ?

We're following the datasheet on section 9.1.4.1 and 9.1.4.2 and we're trying to understand whether we must freeze the DC offset corrector ?

Do we need to read the calibration values and write them back later ?

Best regards,

Nir

  • 0
    TI__Guru* 91947 points

    Nir,

    What frequency are these spurs at? For most applications, freezing the DC offset correction would be done with a DC coupled design. I do not think you would want to freeze this correction with an AC coupled design. What frequency is the ADC sampling at and what IF are they seeing these issues at?

    I have seen an issue like this with another customer in the past and the issue was the sample clock amplitude was reduced at higher temperatures. Can they check the clock at the ADC when the problem occurs? 

    Regards,

    Jim