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Asking about output type for LT1716

Category: Datasheet/Specs
Product Number: LT1716

Hi Team,

Kindly can you provide us with output type for LT1716. is it open collector as shown from block diagram of the device as in the below datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/LT1716.pdf
or it is considered as  CMOS as shown in the website. as follows: https://www.analog.com/en/lt1716

https://www.analog.com/en/parametricsearch/11108#/d=165|3646|4095|4482|4195|4194|5421|4520|4203|4463|3863|3970|5343|5346|5406|5415|5443|5468|5042|4108|5413|5405|5407|5442|5444|s3|s5|s6|s7|s8|s9|s10|s13|s14|s16|s17|s18|s24


Appreciate your support

  • Hi Ahmed,

    I cant find the block diagram that you are referring to because when I open the link, I arrive at the same datasheet as the second link.

    But I can tell you that you can refer to the simplified schematic in the datasheet which has complementary outputs.

    Hope I answered your question.

    Best Regards,
    Sham

  • Hi,

    I think the output is similar to an open-collector output with some pre-provided pull-up current (the Features part says ’Internal Pull-Up Current’). If you look at the simplified schematic in the datasheer, you can see that Q30 can sink considerable current (the datasheet specifies 5mA for output low voltage of 550mV) for logic low output. But for logic high, the source current is much less,  it is provided by a current mirror (Q28 and Q28, and the reference current is provided by another current mirror Q26-Q27). So, I think the output behaves just like a pure open-collector output with some additional pull-up current provided (in the case of missing pull-up resistor). It does not work as a CMOS push-pull output, the sink current is much higher than the source current. I  recommend you to test the behavior in LTSpice.

  • Thank you very much Zoltan,

    I checked again and if this is the schematic you see then the output is indeed an open-collector output with Q30 as the output transistor.


    Best Regards,
    Sham

  • Thanks for your reply,

    Another question, can you provide me with the minimum value of differential nonlinearity for  AD7327-EP