https://www.vlsisystemdesign.com/
Design of a 10 Bit Potentiometric Digital to Analog Converter with 3.3V analog voltage, 1.8V digital voltage and 1 off-chip external reference using the sky130 technology.
https://github.com/vsdip/avsddac_3v3_sky130_v2.git
sky130A
MPW-TWO
Open MPW