Hi there, I have a question about ADA4350.
This device has internal SW and I need to know the spec of charge injections.
Do you have follwing specs?
-Channel input capacitance for off condition.
Charge injection is usually a specification for high speed switching. Since the ADA4350 was not intended for high speed switching, this specification is not available.
There is an input capacitance specification of 2pF common-mode and 3pF differential. There is also a specification worst case switch feedback capacitance when the switch is off of 0.1pF.
Is this what you're looking for?
By the way, I'm curious to know why you need the charge injection specification. Are you seeing some offsets or some other type of noise on your output?
Sorry about the late response.
Actually this question is from one of our customer's designers.
He mentioned that he worry about the charge injection and parasitic capacitors between internal SW output and GND.
In their system , they make this kind of circuit with analog switch and op amps.They always have hard time to eliminate the charge injection effects when they change the gain.
Because the output voltage is up for some period since the FB register of amp is high(the curret flow pass ).
Please let me know if you have similar requests from your customers.
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