ADS7841EB/2K5 datasheet by Texas Instruments

ADS7841EB/2K5 Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the ADS7841?
  The recommended power-up sequence is to apply VCC first, followed by VREF, and then the analog input signal. This ensures proper operation and prevents damage to the device.
• How do I optimize the analog input impedance for the ADS7841?
  To optimize the analog input impedance, use a buffer amplifier with a high input impedance (>10 kΩ) and a low output impedance (<100 Ω) to minimize signal attenuation and distortion.
• What is the maximum sampling rate for the ADS7841?
  The maximum sampling rate for the ADS7841 is 200 kHz, but it can be limited by the analog input signal bandwidth and the system's noise floor.
• How do I handle the ADS7841's internal clock oscillator?
  The internal clock oscillator can be used as a clock source, but it's recommended to use an external clock source for better accuracy and stability. If using the internal oscillator, ensure it's properly bypassed with a 10 nF capacitor.
• What is the purpose of the CAL pin on the ADS7841?
  The CAL pin is used for calibration and should be connected to a 1.5 V reference voltage source. This pin is used to calibrate the ADC's internal voltage reference, ensuring accurate conversions.