ADS774KU datasheet by Texas Instruments

ADS774KU Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the ADS774KU to minimize noise and ensure accurate conversions?
  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.
• How do I ensure the ADS774KU is properly calibrated for optimal performance?
  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.
• What is the recommended input signal range for the ADS774KU, and how do I handle overvoltage conditions?
  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.
• How do I interface the ADS774KU with a microcontroller, and what are the key considerations for data transfer?
  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.
• What are the key power management considerations for the ADS774KU, and how do I minimize power consumption?
  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.