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.
This is a typo in the data sheet and will be fixed in the upcoming Rev.C data sheet. The correct values for a 5V supply are shown below.
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 fact I will be mostly using it for DC measurements, ADA4622-2, ADA4610-2 seem to have large offset, ADA4000-2 even bigger.
I would not do a new design with the AD822; the ADA4622-2 is the next generation part with much better
specs and lower price. Usually rule of thumb for gbw variation is +/-20%.
The AD822 is over 20 years old and the next generation part, the ADA4622-2 is released.
It has a spice model and the data sheet lists differential and common mode capacitance.
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.
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…