1. Volatile vs. Non‑volatile Configuration Storage - FVB (Volatile): DAC output settings, such as output voltage values, are lost after power‑off and must be reconfigured via I²C upon power‑up. - FEB (EEPROM): Configuration parameters are stored in on‑chip EEPROM, enabling automatic restoration of the pre‑power‑off state at startup and reducing MCU initialization overhead. - The FEB is suitable for systems requiring immediate preset output at power‑up or where configuration signals are unavailable; the FVB is better suited for applications where settings are updated dynamically in real time or managed centrally by a host. 2. Endurance and Write Latency - The EEPROM in the FEB has a limited write endurance (typically on the order of 100k cycles), and each write operation takes approximately 5 ms. Frequent reconfiguration may impact device lifetime and real‑time performance. - The FVB imposes no such limitations; its configuration speed is constrained only by the I²C communication rate. - For high‑frequency or real‑time configuration scenarios, the FVB is preferred. The FEB may be chosen when static parameters must be retained, but frequent writes should be avoided. 3. Cost and Supply Chain Considerations - The FEB version with integrated EEPROM generally carries a higher cost, and its data retention characteristics under extreme temperature cycling should be considered. - For cost‑sensitive or harsh‑environment applications, a comprehensive evaluation is recommended; the FVB may offer better cost‑performance.