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TLV7011: Comparator circuit Review

Hari T O0
Genius 3820 points
Part Number: TLV7011

Dear Team,

I am designing a comparator circuit which operates in two modes Low Power Mode( LPM) and Normal Mode (NPM). These are the conventions we are following

Let me explain Normal mode for you. In this mode VIH is 3.6V and VIL is 2.8V. But we are not directly giving this I/P to the comparator.

This "VIH" and "VIL" get divided using a voltage divider. The voltage coming at the comparator I/P will be 1.386 and 1.078.

The REFHI for the comparator is 1.282 and REFL is 1.182 so HYS is 100mv.

Please find the attached schematic and NPM and LPM calculation details and I/P waveforms also. Maximum I/P Frequency is 100Khz

Please review the same and let me know your comments.

Regards

Hari

8831.bit slicer.pdf

  • 0
    TI__Guru 50016 points

    Hi Hari,

    If you are actually driving SMA cables, I would add a 50 ohm series resistor to the comparator output to add some impedance control to minimize reflections, otherwise at high frequencies (100kHz), you will get a lot of reflections and ringing.

    Be sure to follow good high-speed layout techniques. Treat it as a high speed digital device. Make sure C8 is as close the the V+ and V- supply pins as possible and provide a solid ground plane.

  • 0 in reply to Paul Grohe
    Genius 3820 points

    Hi Paul,

    Thank you very much.I will give you Board files for your review once layout is completed.

    Thank you for your time.

    Regards

    Hari