DAC8814IBDBR datasheet by Texas Instruments

DAC8814IBDBR Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DAC8814?
  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 DAC?
  To ensure accurate voltage output, it's 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's not being used to drive a high-impedance load.
• What is the maximum clock frequency for the DAC8814?
  The maximum clock frequency for the DAC8814 is 40 MHz. However, the actual clock frequency may be limited by the specific application and the quality of the clock signal.
• How do I handle the LDAC pin during asynchronous updates?
  During asynchronous updates, the LDAC pin should be held high to ensure that the DAC output is updated correctly. If the LDAC pin is not used, it should be tied to VCC or left unconnected.
• 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 or mid-scale, depending on the CLR_POL bit in the control register. To use the CLR pin, simply tie it to a digital output or a switch, and assert it low to clear the DAC output.