The recommended power-up sequence is to apply VDD first, followed by VREF, and then the digital inputs. This ensures proper device operation and prevents potential latch-up conditions.
The DAC8218 has a rail-to-rail output stage, but the output voltage range is limited to VDD - 0.1V to VDD + 0.1V. Ensure that the output voltage is within this range to avoid output stage saturation and ensure accurate performance.
The internal 2.5V reference voltage is used as a default reference voltage for the DAC. It can be bypassed by connecting an external reference voltage to the VREF pin, allowing for more flexibility in system design.
To achieve the best possible linearity and accuracy, ensure that the input clock frequency is within the recommended range (10 kHz to 50 kHz), and the output load is within the specified range (2 kΩ to 10 kΩ). Additionally, use a low-noise power supply and minimize digital noise coupling to the analog output.
The maximum output current capability of the DAC8218 is 10 mA. Ensure that the output current is within this limit to prevent device damage and ensure reliable operation.
DAC8218SPAGR datasheet
by Texas Instruments
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