nice fA opamp

On Sat, 11 Jun 2016 20:17:02 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

>On Fri, 06 May 2016 19:43:33 -0500, John Fields
><jfields@austininstruments.com> wrote:
>
>>On Thu, 05 May 2016 17:11:36 -0700, John Larkin
>><jjlarkin@highlandtechnology.com> wrote:
>>>http://www.analog.com/en/products/amplifiers/operational-amplifiers/ada4530-1.html#product-overview
>>>Input current is typically 0.1 fA at room temp. Noise and offset specs
>>>are impressive for a fA opamp.
>>>0.1 fA is 625 electrons per second.
>
>>Wowie Zowie...
>>Show your work.
>>John Fields

>How to Convert Amps to Electrons Per Second
><https://www.youtube.com/watch?v=xPlAHcc4p4o>  (1:11)

Sorry, I hit send before I was done...
Looks like it's off by x10.

1Amp  = 1 coulomb/sec = 6.25*10^18 electrons/sec
1fA   = 1*10-15 Amps
1fA   = 6.25*10^3 = 6250 electrons/sec

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On 6/11/2016 10:24 PM, Jeff Liebermann wrote:
> On Sat, 11 Jun 2016 20:17:02 -0700, Jeff Liebermann <jeffl@cruzio.com>
> wrote:
>
>> On Fri, 06 May 2016 19:43:33 -0500, John Fields
>> <jfields@austininstruments.com> wrote:
>>
>>> On Thu, 05 May 2016 17:11:36 -0700, John Larkin
>>> <jjlarkin@highlandtechnology.com> wrote:
>>>> http://www.analog.com/en/products/amplifiers/operational-amplifiers/ada4530-1.html#product-overview
>>>> Input current is typically 0.1 fA at room temp. Noise and offset specs
>>>> are impressive for a fA opamp.
>>>> 0.1 fA is 625 electrons per second.
>>
>>> Wowie Zowie...
>>> Show your work.
>>> John Fields
>
>> How to Convert Amps to Electrons Per Second
>> <https://www.youtube.com/watch?v=xPlAHcc4p4o>  (1:11)
>
> Sorry, I hit send before I was done...
> Looks like it's off by x10.
>
> 1Amp  = 1 coulomb/sec = 6.25*10^18 electrons/sec
> 1fA   = 1*10-15 Amps
> 1fA   = 6.25*10^3 = 6250 electrons/sec
>

He posted 0.1 fA not 1 fA. That would be 10^-16 A.