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EMI/EMC pretesting of Microcontroller

Anushka Parab21
Intellectual 700 points
Part Number: TM4C129KCPDT
Other Parts Discussed in Thread: TM4C1294NCPDT, EK-TM4C1294XL

Dear Sir,


We are using TM4C129KCPDT micro controller in our new Monitoring Instruments.
While inspection by our client, they ask us it micro controller is pretested for EMI/EMC? and are the certificates of EMI/EMC are available from controller manufacturer.
Please let us know above queries.
If selected controller is not pretested, then please let us know other pretested controller for EMI/EMC are available?

Thanks and Regards,

Anushka

Pla Electro Appliances

9619477334

  • 0
    TI__Guru*** 135355 points

    Hello Anushka,

    EMI/EMC testing is done at a system level based on a completed design for products. Certifications are not given out at an MCU device level. Any pretesting must be done with the completed system for it to be valid. Just because the MCU functions properly for EMC does not guarantee the whole system would do so after layout of additional components.

    That said, from a system standpoint, our TM4C1294NCPDT has been tested for EMC based on EMC Direction 2014 EU standards for our EK-TM4C1294XL LaunchPad and has passed. The Declaration of Conformity can be seen here: https://www.ti.com/lit/pdf/sszq113

    We do not share the EMC results of our EVMs because they are not devices intended to be used for mass production and customers must design their own PCBs and have them tested based on their own system requirements. But hopefully those results give your client confidence that the MCU will not have any EMC issues is the PCB is well designed.

  • 0 in reply to Ralph Jacobi
    Intellectual 700 points

    Hello Ralph Jacobi,

    I know EMI/EMC testing is done at a system level based on a completed design for products. And we already planned for the same. but in client inspection, they have asked for pretesting of controller.

    They showed the reference of microchip controller. see below data. and asked us if same thing available for Texas Tiva controller

    Microchip’ EMI Defense

    A direct result of Microchip’s commitment to continuous improvement, Microchip’s EMI protection is a compilation of years of EMI/EMC engineering experience and direct feedback from embedded designers. Microchip has implemented a multifaceted approach to creating PIC microcontrollers that are less sensitive to EMI and limit EMI emissions within an electrical environment. Defense against EMI also incorporates methods to deal with EFT, as well as bursts of ESD (Electrostatic Discharge).

    Microchip realizes the challenges of the embedded engineer, and has developed technology to decrease the susceptibility to EMI/EMC and provide the most electrically robust products available in the industry.

    EMC Advantages of Microchip Products

    • Ease in EMI/EMC qualification and testing to the latest regulatory laws
    • Reduction in radiated EMI emissions
    • Enhanced electrical barrier of protection from ESD and EFT
    • Lower system cost by reducing PCB filtering and isolation
    • Electrically robust solution for long life reliability
    • Higher immunity to injected noise and harsh electrical environments
    • EMI/EMC equivalence with legacy Microchip Products

    Microchip performs extensive EMI/EMC testing to validate the electromagnetic resilience of PIC microcontrollers, dsPIC® digital signal controllers, analog and memory products. EMI/EMC characterization is comprised of a full suite of tests that determine the emissions and susceptibility to both radiated and conductive EMI environments as well as variations due to ESD and EFT.

    Regards,

    Anushka

  • 0 in reply to Anushka Parab21
    TI__Guru*** 135355 points

    Hello Anushka,

    We do not have statement like that for TM4C devices. The growing need to assurances of such EMI/EMC defense was not present when TM4C was released to market years ago, and we are not in position to do a validation across the portfolio to match these statements.

    However, I can say that I have not seen many questions arise regarding EMC concerns and those that arose were due to to poor layout practices and nothing that the MCU was fundamentally to blame for.

  • 0 in reply to Ralph Jacobi
    Intellectual 700 points

    Hello Ralph,

    Thank you for your quick reply.

    Please suggest the latest controller, Which is pretested concerning to EMI/EMC.

    We want on chip Ethernet for our instrument.

    Thanks and Regards,

    Anushka 

  • 0 in reply to Anushka Parab21
    TI__Guru*** 135355 points

    Hello Anushka,

    I don't have TI-wide knowledge of what all MCUs offer on this front. You may want to look at the Hercules family to see if there are any which offer that, I am not sure if they do pretesting but there are newer MCUs with Ethernet in that family.

  • 0 in reply to Ralph Jacobi
    Intellectual 700 points

    Thank you Ralph Jacobi.

    I will check Hercules family of microcontroller.

    Thanks and Regards,

    Anushka