The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital supply (DVCC). This ensures that the internal voltage regulators are powered up correctly.
To ensure accurate voltage output, it is essential to use a high-quality voltage reference, such as the Texas Instruments REF5025. Additionally, the output voltage should be buffered with an op-amp, such as the OPA333, to minimize load current effects.
The maximum output current capability of the DAC8565 is 5mA per channel. Exceeding this current limit can cause damage to the device or affect its accuracy.
To implement a voltage output range other than 0-5V or 0-10V, you can use an external amplifier, such as the OPA277, to scale the output voltage. Alternatively, you can use a resistive divider network to attenuate the output voltage.
The DAC8565's performance is affected by temperature, with a typical temperature coefficient of ±1ppm/°C for the voltage reference and ±0.5ppm/°C for the DAC. To minimize temperature effects, it is recommended to use a temperature-stable voltage reference and to keep the device within its specified operating temperature range.
DAC8565IBPW datasheet
by Texas Instruments
