I was looking for 4 channels of simultaneous ADC with :
- 3X3 mm or less footprint
- SPI or I2C
- Truly isolated channels
The problem with multiplexed channels is cross-talk which is ruining the biometric data collection. I had to use 4 chips of ADS1115 which does the job. However, I am looking for minimizing the PCB footprint and therefore looking for the availability of a 4 channels simultaneous ADC with guaranteed isolation.
All help is appreciated. Thanks