An 8b 500MHz ADC

A flash converter is the most popular way to achieve very fast analog-to-digital conversion. In the past, sampling-rate and input-frequency limits on silicon monolithic 8b converters have been 400MHz. This ADC achieves 500MHz conversion by using a double poly-silicon-emitter self-aligned process with 0.6μm emitter width, and 10GHz f
_τ
, About 22,000 elements are integrated on a 4051x4.62mm chip using double-layer metal.