I am currently studying the schematic of ADN8831 TEC Controller.
Purpose: analyse the loop gain and find an adequate setting for the thermal compensation (performed through chop2 amplifier).
Problem: I am currently struggling with the LINEAR AMPLIFIER. The Detailed Block Diagram does not describe how LFB, LNGATE and LPGATE pins are connected.I guess LFB, LNGATE and LPGATE are related (since they are outputs of the same opamp) and also LNGATE and LPGATE are the differential arrangement of LFB.
Please, is there someone able to give me the detailed schematic of such an OPAMP configuration?
Thanks in advance!
PS: See attached Detailed Block Diagram and Evaluation Board schematic to understand what I am talking about
I know it generates two signals driving the LNGATE and the LPGATE respectively.
I was attempting to unravel the driving circuitry inside the linear amplifier (to have a better understanding of circuit limitations).
Anyway, I was carrying out the loop gain: it should have no effect because of the feedback.