ADS7806U datasheet by Texas Instruments

ADS7806U Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the ADS7806U?
  The ADS7806U requires careful layout and routing to minimize noise and ensure accurate conversions. TI recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital traces separate. Additionally, decoupling capacitors should be placed close to the device.
• How do I handle the high-speed clock input?
  The ADS7806U requires a high-speed clock input, which can be challenging to handle. TI recommends using a clock source with a low jitter and a high-frequency bypass capacitor (e.g., 100nF) to filter out noise. Additionally, the clock input should be routed close to the device and away from noisy signals.
• What is the recommended power-up sequence for the ADS7806U?
  To ensure proper operation, TI recommends powering up the ADS7806U in the following sequence: VCC, AVCC, and then the clock input. This sequence helps prevent latch-up and ensures that the device is properly initialized.
• How do I optimize the analog input circuitry for the ADS7806U?
  To optimize the analog input circuitry, TI recommends using a low-pass filter to remove high-frequency noise, and a buffer amplifier to drive the analog input. Additionally, the analog input should be routed close to the device and away from noisy signals.
• What is the recommended method for synchronizing multiple ADS7806U devices?
  To synchronize multiple ADS7806U devices, TI recommends using a common clock source and a synchronization signal (e.g., SYNC pin) to ensure that all devices are triggered simultaneously. This helps to minimize skew and ensure accurate conversions.