The datasheet of ADA4522 shows the measured voltage noise density for only > 10 Hz frequency region.
I was measured the power spectral density (square of voltage noise density) in the 0.001-32 Hz range.
The result is shown at the attached figure…
I have two questions about ADA4522
1. For sure. Amplifier have input EMI filter and clamp circuit with limit the input current to ±10 mA
Should not be a problem with the situation shown in Figure?
2. ADA4522 have Input Bias Current 50 -150pA,…
Yes, but not with 5V; you need at least 6V across the part.
But why choose an OP07 that is over 30 years old? We have done many generations in the OP07 family,
OP07 -> OP77 -> OP177 -> OP777 -> OP1177 -> AD8671/8675 -> ADA4077-1.
We haven't measured the AD8628 bias current's spike but I can say that there could be spike in bias current based on the internal structure of zero- drift amplifiers. It could be small or huge but I cannot say the exact amplitude unless tested. Why…
Thanks for your help on this.
ADA4522-1 looks very promising, ibias=150p, vos=5uV, p-p noise =117n, and dual supply from -/+22V, which i willbe using +/-15 as my max signal is 12V.
I think I may go with this one.
One final thing on the feedback…
Our zero drift inamp available are LT2053 and LTC6915, AD8231. You can also browse our portfolio on this link and categorize parts from lowest to highest of particular specs that you want to check. Those parts have the lowest offset at gain of…
Apologies for delayed response.
I'm not really sure what your application looks like without having more details, however, I can give some quick and general recommendations that might work for your application. If you have small current signal in…