Motor Current Sensing & ADC

Signal from current sensing pin of motor driver will probably need have high frequency noise that could be present due to PWM signals and switching power supply
- Need low pass filter
I_propi pin on motor driver produces a current output, I am measuring the voltage it creates when it passes through the grounded R_ipropi resistor -> if pin is loaded it will decrease the accuracy of the reading
- Need a voltage buffer
If an ADC only has one power port, generally recommended to use a linear power supply as they are highly sensitive to noise
- Finding an ADC with separate I/O and analog supply voltages that output I2C can be more challenging than finding one that outputs SPI for several reasons:
  - 1) Speed and performance: SPI generally faster than I2C -> more suitable for high-speed applications when ADC performance is critical
    - ADC manufactures may prioritize separate Vsources for higher-end ADCs
  - 2) Complexity and Cost: I2C requires more complex addressing and protocol handling, which will add to cost and design effort
- https://jlcpcb.com/partdetail/MicrochipTech-MCP3021A5T_EOT/C128576
After simulating in LTspice, plus considerations detailed above, decided on the following

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