SBASAT0A September 2025 – November 2025 AMC0380D
PRODUCTION DATA
The following image illustrates a simplified schematic of a circuit that senses the line voltages of a three-phase AC system. All three voltages are measured against neutral. This configuration allows the three AMC0380D devices to share a common isolated power supply on the input side.
The three AMC0380D devices (device 1, device 2, and device 3) are connected directly to phase L1, L2, and L3, respectively. On the opposite side of the isolation barrier, each device outputs a voltage proportional to the phase-to-neutral voltage. A common VDD1 supply is generated from the low-voltage side by an isolated DC/DC converter circuit. A low-cost design is based on the push-pull driver SN6501 and a transformer that supports the desired isolation voltage ratings.