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TLV1811: CMRR Spec

Chi Zhang2
Intellectual 2700 points
Part Number: TLV1811
Other Parts Discussed in Thread: TLV1812-EP

Tool/software:

Hi Expert,

May I know the CMRR spec for TLV1811, there is no definition in datasheet. thanks. 

BR

Chi

  • 0
    Guru 317370 points

    CMRR is an analog value that is not applicable to a comparator with a digital output.

  • +1
    TI__Guru 60786 points

    Hello Chi,

    We generally do not put CMRR numbers for comparators as the inputs tend to have large differential voltages that would swamp any effects of small changes in offset.

    Also it is also very difficult to measure the tiny differences in offset to the point of providing any reasonable CMRR numbers.

    We did not put a CMRR spec on the commercial/Q1 devices, but the TLV1812-EP (dual EP version) does have a typical CMRR of 90dB.