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DRV5013-Q1: Does DRV5013-Q1 have internal clock?

Part Number: DRV5013-Q1
Other Parts Discussed in Thread: DRV5013

Hello Team,

I got a question from customer about the DRV5013-Q1.

Q. Does DRV5013-q1 have internal clock? If yes, Do you know the frequency?

Customer want to know whether the clock frequency affect noise. I thinks other supplier's hall sensor IC have offset cancell function internally and it is chopping by internal clock frequency.

Thanks,

Yuta Kurimoto

  • Hello Kurimoto-san,

    Yes, the DRV5013-Q1 has an internal clock which controls the chopping functionality. However, since this is a digital (open-drain) output, why is noise a concern? The chopping circuitry is only used to provide excellent stability over temperature of magnetic sensitivity, hysteresis, and offset.

    Furthermore, a simple RC filter at the output can be used to reduce system bandwidth and therefore reduce noise if required. An example design for this is given in the DRV5013-Q1 datasheet on pages 17 and 18.

    Best regards,

    Ian Williams
    Applications Manager
    Current & Magnetic Sensing

  • Hello Williams,

    Thanks for your answer.

    The reason why customer worry about the noise is as below.

    If the internal clock frequency is more than 9kHz, they need to apply Radio law certification. The hall sensor which customer is using right now doesn't have internal clock. So If our DRV5013-Q1 has >9kHz clock, it is difficult to replace.

    Do you mean the internal clock frequency is 10kHz?

    Let me know if you have any question,

    Thanks,

    Yuta Kurimoto

  • Ok Kurimoto-san, thank you for the clarification. I will find out if the clock frequency is > 9kHz.

    Best regards,

    Ian Williams
  • Hello Kurimoto-san,

    The internal clock frequency is 500kHz. However, the DRV5013 will not radiate EMI at that frequency so I don't know why the customer requires radio certification.

    Best regards,

    Ian Williams