The cheapest controller with 2 DACs and 1 ADC on board?

Question

Electronics

Needed for the manufacture of the base neuron board, which will then be manually connected to the network.
the price is important because there will be a lot.

Answer 1

STM32F100C4T6B
In general, it's better to put filters on www.digikey.com
PS Whatever you come up with, the idea is bad

Answer 2

Is it important that the signals are analog? If both the source and the receiver of the signal are controllers, can you get rid of unnecessary A/D conversions? For example, use a PWM signal. The source is a timer, there are a lot of them in any controller. The receiver is also a timer, in the STM appnotes there is even an example of how to set up the capture in order to immediately measure the duty cycle.
Then any cheapest controller will do. STM32F030 - $0.5, STM8S003 - $0.4, MSP430G22 - $0.4

Answer 3

unprincipled, of course, but I would like to.
in any case, the inputs should be analog, because it is planned to have an analogue of the nervous system with vibrissae as sensors.

Answer 4

By the way, if a lot of neurons are planned, wouldn't it be better to use some stm32 (for the entire grid) and "multiplex" the ADC input? (roughly speaking - add keys to it, opened by 1/0 on a pin of some "digital" port).
Or does performance characteristics / visibility do not allow?