DAC7642VFT datasheet by Texas Instruments

DAC7642VFT Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DAC7642VFT?
  The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital inputs. This ensures that the internal voltage regulators are powered up correctly.
• How do I ensure accurate voltage output from the DAC7642VFT?
  To ensure accurate voltage output, it is essential to use a stable and low-noise voltage reference, and to decouple the AVCC and VCC pins with suitable capacitors. Additionally, the output voltage should be buffered with an op-amp if it needs to drive a load.
• What is the maximum output current of the DAC7642VFT?
  The maximum output current of the DAC7642VFT is 5mA. Exceeding this current may cause the output voltage to droop or the device to overheat.
• 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 an active-low clear input that resets the DAC output to zero-scale (minimum output voltage) when pulled low. It can be used to reset the DAC output during power-up or when the system is in a reset state.