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.
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.
The maximum output current of the DAC5574 is 5mA per channel. Exceeding this current may cause the output voltage to droop or the device to overheat.
To synchronize multiple DAC5574 devices, connect the SYNC pin of each device together and drive it with a common clock signal. This ensures that all devices update their outputs simultaneously.
The LDAC (Load DAC) pin is an asynchronous input that, when taken low, loads the input registers with new data. This allows for simultaneous updating of multiple DAC channels.
DAC5574IDGS datasheet
by Texas Instruments
