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TIDA-010065: AMC1311 circuit: SHTDN pin connection

Shawn_Wang
Expert 3811 points
Part Number: TIDA-010065
Other Parts Discussed in Thread: AMC1311,

Hi team

I am wondering if you could help explanate the function of the components connected to the SHTDN pin of AMC1311. 

For different versions of schematics, the external components are different. 

  • 0
    TI__Guru** 123678 points

    Hello Stone Wang

    Thank you for looking at TIDA-010065. and also thank you for bringing this question up. For assembly and testing please use the version with the DNP enabled.

    R26  R27 + internal 100K pull up disables the SHTDN. Please look into the data sheer for the logic input level thresholds.

    The current configuration works but populating R26  with OR could also be considered.

    We will look into making these updates during the next opportunity for the design  update.

    Regards,

    Sreenivasa 

  • 0 in reply to Kallikuppa Sreenivasa
    TI__Expert 3811 points

    Hi Sreenivasa 

    Thanks for your prompt reply.

    Could the customer directly connect the SHTDN pin to the Ground?

    Compared to the circuit with R26 and R27, what are the disadvantages for the circuit directly connected SHTDN pin to GND?

    Thank you.

  • 0 in reply to Shawn_Wang
    TI__Guru** 123678 points

    Hello Stone Wang

    Thank you for the reply and query.

    The way we do the reference designs , we provide provisions in the circuit  such that when possible another device can be mounted for some quick testing.

    Since this is a digital input, i do not see any disadvantage connecting SHTDN to Gnd directly as you have suggested.

    Regards,

    Sreenivasa 

  • 0 in reply to Kallikuppa Sreenivasa
    TI__Expert 3811 points

    Sreenivasa 

    Thanks for your confirmation.

    The customer wants to evaluate the performance of TIDA-010065, I am wondering if you could tell me how to apply for this reference design? 

    Thank you.