Author Topic: whats the difference between a differential comparator and a general purpose one  (Read 2580 times)

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Offline Simon

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Looking through digikey for comparators, some are marked as general purpose and some as differential. What is the differential.... uh, I mean difference
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Offline NANDBlog

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If I understood it correctly, differential comparators are supposed to be used on one differential signal, while general purpose comparators are for two single end signals. And the output structure can be significantly different (no pun intended), like the output can be also differential. I dont think this naming is used consistently, or it is any good although.
 

Offline Simon

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hm, still not clear to me, the comparator looks at two voltages and switches accordingly, Your comments sound like what I'd expect for opamps etc, I'd not expect comparators to know the difference.
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Online jpb

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someone asked the same question on stack exchange a couple of years ago:

http://electronics.stackexchange.com/questions/33961/what-is-the-difference-between-a-general-comparator-and-a-differential-comparato

The answers he got indicated that all comparators are differential comparators (as you surmise).
 

Offline Simon

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yea that is what I was thinking, seems even digikey has it's quirks (I got fed up with farnell) when it comes to reading datasheets. I just spoke to their support to ask: "where are the standard drop out linear regulators" they have put them all under LDO, the fact that the main control element in each of the two types is totally different went right over his head, oh but then there is a linear and switching category together.
https://www.simonselectronics.co.uk/shop New stock now in of EEVblog Brymen 235 and uCurrent Gold, Now selling a selection of Probe Master probes
 


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