Below is a suggested schematic update that adds a dedicated 4.096 V reference to your breakout board design:
Schematic Update:
Add 4.096 V Voltage Reference:
Place a voltage reference component from the Flux library (for example, 4.096V Voltage Reference) with designator U2.
Connect the output of the voltage reference (4.096 V) to the VREF pin (pin 11) of the U1.
Power and Grounding:
Connect the supply input(s) of the voltage reference (as per its datasheet) to the positive power rail (typically +VCC) and add appropriate decoupling.
Connect the voltage reference's ground pin to the Ground component.
Decoupling Capacitor:
Add a decoupling capacitor (for example, C1) between the voltage reference's power input and ground. Use a capacitor value as recommended by the voltage reference datasheet.
You can use the Apply changes button to update the schematic with these modifications.