Q1. What is the ADA4622-4 / ADA4622-2 / ADA4622-1?
A1. The ADA4622-4 / ADA4622-2 / ADA4622-1 is the next generation of the AD824 / AD822 / AD820. It is a single supply, 30 V, 8 MHz, Low Bias Current, Single-Supply, RRO, Precision JFET Op Amp.
Thank you very much Rob.
An alternative to ADA4622-2 could be the ADA4610-2 which has lower 1/f noise (0.45uApp), 16.3MHz GBWP, 25 V/us SR, 10^13 ohm input resistance. The "Vos TC" (offset drift) of ADA4610-2 (2uV/deg. C, B Grade) is better than ADA4622-2…
I read Datasheet of ADA4622-1/ADA4622-2/ADA4622-4(Rev. D).
I have a question.
IN ELECTRICAL CHARACTERISTICS, VSY = ±15 V Current Noise Density is 0.8fA/√Hz. (Rev. D | Page 4 of 37)
IN ELECTRICAL CHARACTERISTICS, VSY = ±5 V
In the Page 1 of the specsheet, the final paragraph reads:
The ADA4622-1 is available in a 5-lead SOT-23 package and an 8-lead LFCSP package
while in the Page 11 of the specsheet, the page shows:
Figure 2 and Figure 3, showing the ADA4622-1 in the SOT…
in fact I will be mostly using it for DC measurements, ADA4622-2, ADA4610-2 seem to have large offset, ADA4000-2 even bigger.
I'm curious about the shutdown/disable feature of the ADA4622-1.
What is the impedance looking into the ADA4622-1 at its inputs and output when the part is in shutdown? I like the idea of a circuit like Figure 99 of the datasheet, but what extra load…
What about the ADA4622 ? This one does not seem to have the differential limiting input.
ADA4622: it is recommende to connect the epad to V+. But can it be connected to any other signal such as GND? Why V+ any specific reason for that?
Firstly, I would say if you are using the ADA4622-2 that this amp may struggle to drive the AD7768-4 directly on it's own. Generally we would need to use an additional driver amplifier between it and the ADC to settle the input to the ADC due…