How will you make that complex analog/digital circuit in volume?
Traditionally one would lay out a board. Maybe all or most of the digital bits can be stuffed into a field-programmable gate array (FPGA). The analog generally gets distributed via op amps, transistors, and passive components over the printed-circuit board. Crank up the volume and it might make sense to ASIC-ize the FPGA, but there's not much one can do to compress the analog.
Triad Semiconductor now offers an intriguing solution, a mixed-signal ASIC that is relatively cheap to produce.
The company sells ICs they call Via Configurable Arrays (VCA), which are nearly-complete ASICs. They're composed of "tiles" that contain standard components, such as all sorts of op amps, resistors, capacitors, data converters, and the like.
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