HCPL-7800A-000E 7800A-000E Broadcom, Isolation Amplifier, 5 V, 8-Pin. The range of isolation amplifier optocouplers from Avago Technologies is ideal for industrial environments where the optocoupler is used to insulate high voltages and isolate any unwanted signals. Sigma-delta modulator technology allows the current and voltage sensor families to provide precise measurements of phase current and bus voltage in motor drives, power inverters and voltage signals in general isolation circuits.