That accessory voltage reference outputs a stable 4.096V. Commonly used as an excitation voltage for bridge circuits. Simply attach the supply side of the bridge to the 4096 terminal, and ground to the GND terminal. The IOA and IOB lines are simply pass-through terminals, and do not interact with the accessory in any way.

• Voltage: 4.096V
• Accuracy: ± was 0.08%, 3.27mV
• Maximum load: 50mA
• Short circuit current: 100mA
• Temperature coefficient: 5 ppm / ° C