The recommended layout and routing for the ADS7870EAG4 involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the analog input traces. Additionally, it's recommended to use a 4-layer PCB with a dedicated analog power plane and a dedicated digital power plane.
To optimize the performance of the ADS7870EAG4 in noisy environments, use a low-pass filter at the input, use a shielded cable for the analog input, and consider using a common-mode filter. Additionally, ensure that the analog and digital grounds are properly separated and that the power supply is well-regulated.
The maximum sampling rate of the ADS7870EAG4 is 1 MSPS (million samples per second) at 12-bit resolution. However, the sampling rate can be increased to 2 MSPS at 10-bit resolution or 4 MSPS at 8-bit resolution.
The ADS7870EAG4 does not require calibration. It has an internal calibration circuit that performs a self-calibration sequence during power-up. However, if desired, an external calibration can be performed by applying a known input voltage and adjusting the offset and gain registers accordingly.
The power consumption of the ADS7870EAG4 depends on the operating mode and the sampling rate. In normal operation, the power consumption is typically around 35 mW at 1 MSPS. In power-down mode, the power consumption is typically around 10 μW.
ADS7870EAG4 datasheet
by Texas Instruments
