Nexperia for their 74LVCV2G66 claims 0.0035 pC typical.. that's more than an order of magnitude better than the best spec'd specialized analog switches.
What am I missing here?
--sp
-- Best regards, Spehro Pefhany
A typo? ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
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Got to be a typo. Nanocoulombs, maybe, but even that sounds optimistic.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
Speculation: It depends on the particular sample. They tested 100pcs and it could be anything between +10nC or -10nC. The average or "typical" was 0.0035pC. :)
I have seen similar specmanship on other datasheets for switches - depending on supply and switched voltage it can range positive or negative so they pick a tiny near-zero net charge injected point for the "typical" spec. But here they do specify these conditions.
-- John Devereux
NXP's 74LVC1G66 switch datasheet lists 3 to 7pC, which is more in the reasonable region.
--
Thanks,
- Win
Hmm. What would the charge injection be of a carefully laid out SO-70 footprint sans chip? So, just Vss * interelectrode capacitance?
-- Tim Wescott Control systems, embedded software and circuit design I'm looking for work! See my website if you're interested http://www.wescottdesign.com
Yes, that has got to be it, thanks. As Win says, probably a few pC.
--sp
-- Best regards, Spehro Pefhany
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