Author Topic: 74LVCV2G66 abnormal charge injection value  (Read 620 times)

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Offline MasterTTopic starter

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74LVCV2G66 abnormal charge injection value
« on: September 11, 2022, 11:21:16 pm »
https://www.nexperia.com/products/analog-logic-ics/analog/analog-switches/series/74LVCV2G66.html
DS  https://assets.nexperia.com/documents/data-sheet/74LVCV2G66.pdf
page 11 says <0.003 pC, likely a typo. Can't get tech support from nexperia as a hobbyist.

What do you think?
 

Offline WattsThat

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Re: 74LVCV2G66 abnormal charge injection value
« Reply #1 on: September 12, 2022, 01:13:22 am »
Cannot speak to your question from a position of actual experience but I found this on AD’s website:

NOTE: Charge injection is usually specified on the data sheet under these matched conditions, i.e., VSOURCE = 0 V. Under these conditions,the charge injection of most switches is usually quite good in the order of 2 to 3 pC max. However the charge injection will increase for other values of VSOURCE, to an extent depending on the individual switch. Many data sheets will show a graph of charge injection as a function of Source voltage.

My swag: Given the NXP part isn’t a specialized exotic switch, comparing it to switches that have the charge injection specified leads me to believe the datasheet units should have been nC rather than pC.
 
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Offline SiliconWizard

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Re: 74LVCV2G66 abnormal charge injection value
« Reply #2 on: September 12, 2022, 01:44:36 am »
Their 74LVC2G66 datasheet states 2-3 pC:
 https://www.nexperia.com/products/analog-logic-ics/analog/analog-switches/series/74LVC2G66.html

Not quite sure about the internal differences of the *74LVCV2G66* (it's supposed to be "Overvoltage tolerant"), but it does look like a typo here indeed. 2-3 fC? Yeah sure.
 
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