Texas Instruments recommends a 4-layer PCB with a solid ground plane, and placing the ADC close to the analog signal sources. The digital lines should be routed away from the analog lines, and the power supply lines should be decoupled with capacitors.
To optimize performance in noisy environments, use a low-pass filter at the input, use a shielded cable for the analog signal, and consider using a common-mode filter. Additionally, ensure that the power supply is well-regulated and decoupled.
The maximum sampling rate of the ADS1218Y/250G4 is 250 kSPS, but this can be affected by the system clock frequency, the number of channels being converted, and the settling time of the analog input.
The ADS1218Y/250G4 has an internal calibration mechanism that can be initiated through the CAL pin. The calibration process involves shorting the analog input to the internal reference voltage, and then adjusting the offset and gain registers to achieve the desired accuracy.
The power consumption of the ADS1218Y/250G4 depends on the operating mode, sampling rate, and supply voltage. Typically, the power consumption is around 15 mW at 250 kSPS, but this can be reduced to around 5 mW in low-power mode.
ADS1218Y/250G4 datasheet
by Texas Instruments
