The recommended power-up sequence is to apply VCC first, followed by VREF, and then the digital inputs. This ensures proper device operation and prevents potential latch-up conditions.
To ensure accurate voltage output, it's essential to use a stable and low-noise voltage reference (VREF) and to decouple the VREF pin with a capacitor to reduce noise. Additionally, use a low-impedance output buffer amplifier if the load requires a high current.
The maximum output current of the DAC8551 is 5 mA. Exceeding this current may cause the output voltage to droop or the device to overheat.
During power-up and power-down, it's recommended to keep the digital inputs (SCL, SDA, and SYNC) in a high-impedance state or tied to a fixed logic level to prevent unwanted device operation or latch-up conditions.
The SYNC pin is used to synchronize the DAC8551's output with an external clock signal. This pin can be used to ensure that the DAC output is updated synchronously with other devices in the system.
DAC8551IDGKT datasheet
by Texas Instruments
