The recommended power-up sequence is to apply the analog supply voltage (AVCC) first, followed by the digital supply voltage (DVCC), and then the clock signal. This ensures proper initialization of the device.
To ensure accurate voltage output, it is essential to use a low-noise, low-impedance voltage reference, and to decouple the analog supply voltage (AVCC) with a 10uF capacitor. Additionally, the output voltage should be filtered with a low-pass filter to reduce noise and ripple.
The maximum clock frequency that can be used with the DAC5672AIPFB is 40 MHz. However, the actual clock frequency used may be limited by the specific application and the required data transfer rate.
The SYNC pin is used to synchronize the DAC's output with an external clock signal. It should be tied to the digital ground (DGND) if not used. If used, it should be connected to a clock signal that is synchronized with the data transfer clock.
The CLR pin is an active-low clear input that resets the DAC's output to zero when asserted low. It can be used to reset the DAC's output to a known state during power-up or when the device is not in use.
DAC5672AIPFB datasheet
by Texas Instruments
