I have some questions on parts of the AD745 datasheet including some basics.
I am referring to the most recent datasheet of the AD745 which can be found here:
Thank you very much for answers and explanations.
Thank you for using ADI products and sorry for the very late response. As for your questions,
1. Thank you for noticing this error. The caption should refer to Figure 7 and not Figure 5. We'll get this fixed.
2. I'm also confused about this sentence. I think the effective resistance here is the equivalent resistance of the T-network which is Rth= Rs +R1//R2. I'm just not sure on this. I'll consult the product owner for this question.
3. You are correct that the equation of the current noise should be sqrt(4kT/R). We'll also get this fixed. Regarding Figure 8, I'll get back to you on that.
4. The newest alternative part of AD745 is ADA4637-1. You can look at its specifications here - http://www.analog.com/media/en/technical-documentation/data-sheets/ADA4627-1_4637-1.pdf