Thank you for clarifications!
I've modify the schematic:
- R5,R6,R7,R8,R9,R10,R11,R12 are 0.1%
- added 100ohm out of U2 and U3 (R16,R17)
- changed the regulator to the MCP1703 5V fixed version
- added a low battery indicator at ~5.3V almost
- updated BAV199 symbol and connections
I'll go for the digital one.
If this schematic pass your check I'll try the PCB prototype for this one