A good layout and routing practice is to keep the analog and digital grounds separate, use a solid ground plane, and keep the analog signal traces away from the digital signal traces. Additionally, use a low-ESR capacitor for the AVDD pin and a 0.1uF capacitor for the REF pin.
The ADS774KU has an internal calibration circuit that can be enabled by setting the CAL pin high. The device will then perform a self-calibration sequence. It's recommended to perform calibration after power-up and after any changes to the reference voltage or input range.
The recommended input signal range for the ADS774KU is 0 to VREF. For overvoltage conditions, it's recommended to use external protection circuitry such as a voltage clamp or a resistive divider to limit the input voltage to within the recommended range.
The ADS774KU can be interfaced with a microcontroller using a serial interface (SPI or I2C). Key considerations for data transfer include ensuring proper synchronization, using a suitable clock frequency, and handling data formatting and byte ordering.
Key power management considerations for the ADS774KU include using a low-dropout regulator for the AVDD pin, minimizing digital activity during conversions, and using the power-down mode when not in use. Additionally, consider using a low-power microcontroller and optimizing the system's overall power budget.
ADS774KU datasheet
by Texas Instruments
