ADN8831 - Linear Amplifier

Discussion created by antonellolaneve on Sep 27, 2017
Latest reply on Sep 28, 2017 by antonellolaneve

Good morning,

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!

Antonello Laneve



PS: See attached Detailed Block Diagram and Evaluation Board schematic to understand what I am talking about




Detailed Block Diagram Evaluation Board Schematic