1. The +ve and -ve references are generated and applied to the DAC.
2. In the -ve reference part, ADR02 produces 5-V reference. Its output is connected to inverting input of op-amp (U7, OP1177)
This scheme of using an op-amp is not clear.
Can anyone elaborate on this scheme.
I presume that the purpose is to generate - 5V reference.
But the scheme is not clear.
Thanks in advance to those who can clarify this point.