4xMAX128 8ch ADC, low impedance --> buffer 8xTL074

MAX5115 DAC 16x4ch NVM obsolete



fully differential flipflop 13€digikey:
https://www.onsemi.com/pub/Collateral/NB4L52-D.PDF
dual differential clk/data 15€
https://www.onsemi.com/pub/Collateral/MC10EP29-D.PDF
high impedance high precision ADC 6ch:
https://datasheets.maximintegrated.com/en/ds/MAX11259.pdf
max14661 analog mux i2c 16 chan 4,42
https://datasheets.maximintegrated.com/en/ds/MAX14661.pdf
4ch buffered dac
https://datasheets.maximintegrated.com/en/ds/MAX5816.pdf

TI DAC53401/43401 10/8 bit DAC single i2c NVM

microchip MCP4728 4ch nvm i2c buffered address b1100

i2c isolators
http://www.ti.com/de-de/isolation/isolated-interfaces/i2c/products.html
CD54HC154 4->16 decoder. can be driven from i2c GPIO to enable MCP4728

max14661 i2c amux beyond rails (+/-5.5V) 
https://www.mouser.de/datasheet/2/256/MAX14661-263830.pdf