The SPT7912 A/D converter is industry's first 12-bit monolithic analog-to-digital converter capable of sample rates greater than 30 MSPS. On board input buffer and track/hold function assures excellent dynamic performance without the need for external components. Drive requirement problems are minimized with an input capacitance of only 5 pF. Inputs and outputs are ECL to provide a higher level of noise immunity in high speed system applications. An overrange output signal is provided to indicate overflow conditions.