The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital supply (DVCC). This ensures that the analog circuitry is powered up before the digital circuitry.
To ensure accurate voltage output, it is essential to use a stable reference voltage, minimize noise on the analog input pins, and use a low-noise power supply. Additionally, the output voltage should be buffered with an op-amp to prevent loading effects.
The maximum output current of the DAC8563 is 5mA. Exceeding this current limit can cause damage to the device or affect its accuracy.
The DAC8563's digital interface is a 3-wire serial interface. The SCLK pin is the clock input, the SDIN pin is the data input, and the SYNC pin is the chip select. The interface operates in SPI mode, and the clock frequency should not exceed 50 MHz.
The CLR pin is an active-low clear input that resets the DAC8563's internal registers and output voltage to zero. It can be used to initialize the device or to reset the output voltage to a known state.
DAC8563TDGSR datasheet
by Texas Instruments
