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TLV7041-Q1: SCH review

Amelie Zheng
Genius 10865 points
Part Number: TLV7041-Q1
Other Parts Discussed in Thread: TLV7041

Hi Team,

Could you kindly help for 

The maximum voltage of the low level from customer's ultrasound (ULTRA_IO) is about 2.8V, and the high level is about 12V. The comparator is designed according to the figure below, please help to review whether it is reasonable.

  • 0
    Guru 140200 points

    Hi Amelie,

    what is the purpose of Q2? Shall it protect the input of TLV7041 against overvoltages? Why so complicated? Why not just using a simple resistive voltage divider?

    Also, I would add a hysteresis. By the way, is the TLV7041 fast enough?

    Please give some more details on the circuit. What exactly is the input signal (frequency, duty cycle, shape)? And what is the purpose of the comparator in this circuit?

    Kai

  • 0 in reply to kai klaas69
    TI__Genius 13570 points

    Hello Kai,

    Thank you for pointing out some design details that can help Amelie with this schematic review.

    Amelie,

    Thank you for your post. I would also like to know the purpose of Q2 in their design. 

    Amelie Zheng said:
    The maximum voltage of the low level from customer's ultrasound (ULTRA_IO) is about 2.8V, and the high level is about 12V.

    You also provided this information. Are you looking for implementing hysteresis with the TLV7041?

    Please also provide the input signal details that Kai mentioned as well. 

    Best Regards,

    Joe

    Applications Engineer

    Linear Amplifiers Business Unit | Comparators Product Line (CMPS)

    All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml)

  • 0 in reply to Joe Vanacore
    TI__Genius 13570 points

    Hello Amelie,

    I have not heard back from you for quite some time. Please respond by the end of this week or I will close this thread.

    Best Regards,

    Joe

    Applications Engineer

    Linear Amplifiers Business Unit | Comparators Product Line (CMPS)

    All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml)