An electrostatic discharge protection circuit includes a first LC resonator circuit coupled to an input node and disposed in parallel with an internal circuit that is also coupled to the input node, and a second LC resonator circuit coupled in series with the first LC resonator circuit at a first node. A Silicon Oxide overcoat covers the transducer and a Silicon Nitride layer covers the Silicon Oxide overcoat within only the center and edge regions. A sampling clock defines sampling periods that overlap the bits in the input digital optical signal.