(must contain modules as: multiplexer 16 channel, ADC 1 Mps, signal generator, and a demodulator to extract the phase and amplitude of an AC signal)
That looks like an analog-heavy application. Please take a look at the below device and kit, and see if these fit your application:
PSoC® Analog Coprocessor
CY8CKIT-048 PSoC® Analog Coprocessor Pioneer Kit
Please let me know if you have any additional questions.
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