DAC7802KP datasheet by Texas Instruments

DAC7802KP Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DAC7802KP?
  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 DAC7802KP?
  The DAC7802KP has an output voltage range of 0 to VREF. To ensure accurate output voltage, the reference voltage (VREF) should be connected to a stable voltage source, and the output voltage should be buffered with an op-amp if it needs to drive a load.
• What is the effect of clock frequency on the DAC7802KP's performance?
  The clock frequency affects the DAC's settling time and glitch energy. A higher clock frequency can reduce settling time but may increase glitch energy. The recommended clock frequency range is 10 MHz to 40 MHz.
• How do I minimize noise and distortion in the DAC7802KP's output?
  To minimize noise and distortion, use a low-noise voltage reference, decouple the power supplies with capacitors, and use a low-pass filter at the output. Additionally, ensure that the PCB layout is designed to minimize noise coupling and electromagnetic interference.
• What is the DAC7802KP's output impedance, and how does it affect the output voltage?
  The DAC7802KP's output impedance is typically around 0.5 ohms. This low output impedance ensures that the output voltage is not significantly affected by the load impedance. However, if the load impedance is very low, it may affect the output voltage accuracy.