DAC7800LP datasheet by Texas Instruments

DAC7800LP Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DAC7800LP?
  The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital inputs. This ensures proper device operation and prevents latch-up.
• How do I handle the output voltage range of the DAC7800LP?
  The DAC7800LP has a rail-to-rail output stage, but the output voltage range is limited to VCC - 0.5V to VCC + 0.5V. Ensure that the output voltage is within this range to avoid output stage saturation and ensure accurate DAC operation.
• What is the effect of clock jitter on the DAC7800LP's performance?
  Clock jitter can affect the DAC7800LP's performance by introducing noise and distortion in the output signal. It is recommended to use a low-jitter clock source and to keep the clock signal path as short as possible to minimize jitter.
• How do I ensure accurate DAC operation at high temperatures?
  To ensure accurate DAC operation at high temperatures, it is recommended to use a voltage reference with a low temperature coefficient, such as the REF5025. Additionally, ensure that the device is operated within its specified temperature range and that the PCB is designed to minimize thermal gradients.
• What is the recommended layout and routing for the DAC7800LP's analog and digital signals?
  It is recommended to separate the analog and digital signal paths on the PCB to minimize noise coupling. Use a star-ground configuration and keep the analog signal paths as short as possible. Additionally, use a solid ground plane and avoid routing digital signals under the analog signal paths.