Comparator response time i slow...why?

[treez]

The LTC1841 commparator has a propagation delay of up to 14us

LTC1841 DATASHEET
http://cds.linear.com/docs/Datasheet/184123f.pdf

How can this be?

...i thought comparators were supposed to be fast?

The LM393 has a response time of 1.4us

LM393 DATASHEET:
http://www.ti.com/lit/ds/symlink/lm193-n.pdf

....The 14us seems ridiculous.....surely if its that slow you'd just use an opamp instead?......(as a comparator)

 

[crutschow]

If you notice from the data sheet, it's a ultra-low power device with much lower power (over a factor of 100 less) than the LM393. It's used where low power is more important than speed, such as battery operated devices. Low power devices are slower since there is less current to charge the various internal parasitic capacitances when the comparator changes states.