DAC7731EC datasheet by Texas Instruments

DAC7731EC Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DAC7731EC?
  The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital supply (DVCC). This ensures that the analog and digital sections of the device are powered up correctly.
• How do I ensure accurate voltage output from the DAC?
  To ensure accurate voltage output, it is essential to use a high-precision voltage reference (VREF) and to decouple the VREF pin with a capacitor to reduce noise. Additionally, the output voltage should be buffered with an op-amp to prevent loading effects.
• What is the maximum output current of the DAC7731EC?
  The maximum output current of the DAC7731EC is 5 mA. Exceeding this current limit can cause damage to the device or affect its accuracy.
• How do I handle the SYNC pin during asynchronous updates?
  During asynchronous updates, the SYNC pin should be held low to prevent the DAC from updating the output voltage. When the SYNC pin is high, the DAC updates the output voltage based on the input data.
• What is the purpose of the CLR pin, and how do I use it?
  The CLR pin is used to clear the DAC output to a zero-scale voltage. To use it, pull the CLR pin low to clear the output, and then release it to allow the DAC to update the output voltage based on the input data.