ADS1258MRTCTEP datasheet by Texas Instruments

ADS1258MRTCTEP Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the ADS1258MRTCTEP to minimize noise and ensure optimal performance?
  Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital signals separate. Use short, direct traces for analog signals and avoid crossing digital signals over analog signals. Also, use a common mode filter and a ferrite bead to filter out high-frequency noise.
• How do I calibrate the ADS1258MRTCTEP to achieve the highest accuracy?
  Calibration involves adjusting the gain and offset of the ADC. Use the built-in calibration registers to adjust the gain and offset. You can also use an external calibration signal to adjust the gain and offset. Refer to the datasheet for the calibration procedure.
• What is the recommended power-up sequence for the ADS1258MRTCTEP?
  Power up the analog supply (AVDD) first, followed by the digital supply (DVDD). Ensure that the analog supply is stable before applying the digital supply. Also, ensure that the clock signal is stable before applying the digital supply.
• How do I handle the high-speed clock signal (CLKIN) to the ADS1258MRTCTEP?
  Use a low-jitter clock source and a clock buffer to drive the CLKIN pin. Ensure that the clock signal is terminated properly to prevent reflections. Use a series resistor and a capacitor to filter out high-frequency noise.
• What is the recommended method for driving the analog input signals to the ADS1258MRTCTEP?
  Use a low-impedance source to drive the analog input signals. Use a buffer amplifier or an op-amp to drive the analog input signals. Ensure that the analog input signals are within the specified voltage range and that the input impedance is matched to the ADC input impedance.