ADS7828E/2K5G4 datasheet by Texas Instruments

ADS7828E/2K5G4 Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the ADS7828E/2K5G4 to minimize noise and ensure accurate conversions?
  Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital signals separate. The analog input traces should be short and direct, and the digital output traces should be routed away from the analog inputs. Additionally, decoupling capacitors should be placed close to the device to filter out noise.
• How do I handle the device's power-on reset (POR) and brown-out reset (BOR) during power-up and power-down sequences?
  The POR and BOR circuits ensure that the device resets properly during power-up and power-down sequences. To handle these resets, the system designer should ensure that the power supply ramps up and down slowly, and that the device is held in reset until the power supply is stable. Additionally, the system designer should ensure that the device is properly reset and initialized after a power-up or power-down sequence.
• What is the recommended clock frequency and timing for the ADS7828E/2K5G4, and how does it affect the device's performance?
  The recommended clock frequency for the ADS7828E/2K5G4 is between 1 MHz and 4 MHz. The clock frequency affects the device's conversion rate, with higher clock frequencies resulting in faster conversion rates. However, higher clock frequencies also increase the device's power consumption and noise sensitivity. The system designer should choose a clock frequency that balances conversion rate and power consumption based on the specific application requirements.
• How do I calibrate the ADS7828E/2K5G4 to achieve optimal accuracy and performance?
  The ADS7828E/2K5G4 does not require calibration, as it is a self-calibrating device. However, the system designer should ensure that the device is operated within its specified temperature range and that the analog input signals are within the device's specified input range. Additionally, the system designer should ensure that the device is properly initialized and configured for the specific application.
• What are the common pitfalls and mistakes to avoid when designing with the ADS7828E/2K5G4?
  Common pitfalls to avoid when designing with the ADS7828E/2K5G4 include improper power supply decoupling, inadequate analog input filtering, and incorrect clock frequency and timing. Additionally, the system designer should avoid overloading the device's analog inputs, and ensure that the device is properly reset and initialized during power-up and power-down sequences.