DAC7801LU datasheet by Texas Instruments

DAC7801LU Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DAC7801LU?
  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 ensure accurate voltage output from the DAC7801LU?
  To ensure accurate voltage output, it is essential to use a stable and low-noise reference voltage, decouple the power supplies, and use a low-impedance output load. Additionally, consider using a voltage buffer or op-amp to drive the output if necessary.
• What is the maximum output current capability of the DAC7801LU?
  The maximum output current capability of the DAC7801LU is 5mA. Exceeding this limit may cause the output voltage to droop or the device to overheat.
• How do I handle the DAC7801LU's output glitch during power-up or code changes?
  To minimize output glitches, use a power-on reset circuit to hold the DAC in a known state during power-up. Additionally, consider using a glitch-reduction capacitor (e.g., 10nF) between the output and ground to filter out high-frequency transients.
• What is the recommended layout and routing for the DAC7801LU's digital and analog signals?
  To minimize noise and ensure proper operation, keep digital and analog signals separate, use a solid ground plane, and route analog signals away from digital signals. Additionally, use a low-inductance path for the output signal and decouple the power supplies.