Texas Instruments recommends a 4-layer PCB with a solid ground plane, and placing the ADS1201U/1K close to the analog input signals. Additionally, decoupling capacitors should be placed as close as possible to the device's power pins, and the analog and digital grounds should be separated and connected at a single point.
To handle the high impedance of the analog input pins, it is recommended to use a buffer amplifier or an op-amp with a high input impedance (>10GΩ) to drive the input signals. This will help to minimize signal attenuation and ensure accurate measurements.
The maximum sampling rate of the ADS1201U/1K is 15,000 samples per second (SPS) for a single channel, and 7,500 SPS for multiple channels. However, the actual sampling rate may be limited by the system's clock frequency, data conversion time, and other factors.
The ADS1201U/1K has an internal calibration mechanism that can be initiated through the CAL pin. Additionally, external calibration can be performed by applying a known input voltage and adjusting the device's offset and gain registers accordingly. It is recommended to perform calibration at power-up and periodically during operation to ensure accurate measurements.
The power consumption of the ADS1201U/1K is typically around 15mW at 3V supply voltage. To minimize power consumption, it is recommended to use the device's power-down mode, reduce the clock frequency, and optimize the system's power management scheme.
ADS1201U/1K datasheet
by Texas Instruments
