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TL3016: VOH support 3.3V

Jimmy WANG
Genius 4085 points
Part Number: TL3016
Other Parts Discussed in Thread: TL3116, TLV1871, TLV1872, TLV3602

Tool/software:

Hi team,

I found TL3016 pin 2 pin with  LT1671CS8#PBF. But if other products support VOH 3.3V ? thanks 

  • 0
    TI__Guru 60426 points

    Hello Jimmy,

    The TL3116 is the improved version (extended input range) of the TL3016 - that is what we would recommend.

    All our other low voltage, high speed comparators are not P2P and have LVDS or ECL outputs.

    What is the application, input signals and supply voltage?

  • 0 in reply to Paul Grohe
    Genius 4085 points

    Hi tema,

    Could you base on TL3116 spec provoide a VOH=3.3V solution? thanks 

  • 0 in reply to Jimmy WANG
    Genius 4085 points

    supply voltage:+/-5v

    input signals: 100k max. +/-3.5vpp

  • 0 in reply to Jimmy WANG
    TI__Genius 11055 points

    Hi Jimmy,

    Is your input signal centered around 0V? If so, the input signal will violate the input common mode range of the TL3116:

    What is your application? Do you require the complementary outputs Q and Qbar?

    If you want the input to detect +/-3.5Vpp while having a single ended output swing from 0 to 3.3V, the TLV1871 may work for your application. TLV1871 is a comparator with separate input and output supplies. You can power VCCI and VEEI with +5V and -5V, and VCCO and VEEO with 3.3V and 0V. In this case, you can compare the full range of +/- 5V while outputting 0 to 3.3V.

  • 0 in reply to HO SIU
    Genius 4085 points

    Hi team,

    The customer wants to detect two sine waves with different phases, and use a high-speed comparator to detect them.Use a zero-crossing comparator to get a square wave and then throw it into the FPGA for calculation.
    Is there any other way to simply design such a function?

  • 0 in reply to Jimmy WANG
    TI__Genius 11055 points

    Hi Jimmy,

    Thanks for informing me of the application.

    The TLV1872 could work for your zero-cross application. If you power the TLV1872 per my previous reply, you could have your input signals be the full sine wave and have the TLV1872 still output 3.3V logic for your FPGA. There is a question of propagation delay, though. The TL3016 you've noted in your original post has sub-10ns propagation delay, while the TLV1872 has 65ns typ. at 100mV VOD (comparable to the LT1671CS8). Do you require a sub-10ns propagation delay?

    If you need a faster device, the TLV3602 is a good option with 2.5ns propagation delay, but without the separate input and output supply that TLV1872 has. This means that you will need power the TLV3602 with a 3.3V supply and clamp the input sine wave with discrete components like the ones shown here: Zero crossing detection using comparator circuit (Rev. A)