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ADS130E08: Help on DSP

Arion Doneda
Prodigy 60 points
Part Number: ADS130E08
Other Parts Discussed in Thread: ADS131M04, ADS131E08, , TIDA-010037

Hi,

I'm having some difficulty with the specification of a DSP. How to know the correct parameters like clock, bits and etc?
Are there some recommended DSP's for this ADC?

The intended apllication is for Three-Phase Metering.

Thanks!

Regards,

Arion Doneda

  • 0
    TI__Mastermind 39155 points

    Hi Arion,

    I'm not sure if I understood your questions well. ADS131E08 provides two different clocking methods: internal and external. You can use the ADC's internal clock. In order to interface with ADS131E08, you need a DSP or microcontroller which has a serial interface (SPI) peripheral. The following link shows a reference design based on ADS131M04, it may be a good reference for you:

    Two-Phase Rogowski Coil Based Electricity Meter Analog Front-End Circuit

    Best regards,

    Dale

  • 0 in reply to Dale Li
    Prodigy 60 points

    Hi Dale,

    My problem is that I need to specify a DSP to use with ADS130E08, but I don't know exactly what to look for. What are the correct specifications that I need to look that makes it compatible with the ADC that I mentioned. What is the correct clock frequency and so on.

    Also, I would like to know the advantages of using a DSP instead of a microcontroller, and when is it really necessary to use it.

    Thank you.

    Best regards,

    Arion Doneda

  • 0 in reply to Arion Doneda
    TI__Mastermind 39155 points

    Hi Arion,

    ADS130E08 does not have a special requirement for the controller, it needs a SPI interface:

    • Maximum SCLK frequency:  20MHz for 3.3V DVDD.
    • Minimum SCLK frequency: you need to clock out all the data before next conversion, so the minimum SCLK frequency can be calculated according to the following information in the datasheet: 

                

    Your controller or DSP  is not only used for communicating and collecting data from the ADC, but also used for data post-processing. We do have another e-meter reference design based on MSP432 and ADS131M04 ADC (TIDA-010037) which is shown below, this reference design can be a good reference for you as you may be considering a different current measurement solution (CT, Rogowski or Shunt). More importantly, we can support metrology library for this e-meter solution.

    High-Accuracy Split-Phase CT Electricity Meter Reference Design Using Standalone ADCs

    Best regards,

    Dale