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 output voltage, it is essential to use a high-quality external voltage reference, and to decouple the AVCC pin with a 10uF capacitor to reduce noise. Additionally, the output voltage should be buffered with an op-amp to prevent loading effects.
The DAC5662IPFBRG4 can sink or source up to 10mA of output current. However, it is recommended to limit the output current to 5mA to ensure accurate output voltage and to prevent overheating.
To implement a bipolar output voltage range, an external op-amp and resistors can be used to create a voltage summing amplifier. The DAC output is connected to the non-inverting input of the op-amp, and the inverting input is connected to a voltage reference. The output of the op-amp is then connected to the load.
The DAC5662IPFBRG4's performance is affected by temperature, with the output voltage drift and integral nonlinearity (INL) increasing with temperature. The device is specified to operate over a temperature range of -40°C to 125°C, and the user should consider these temperature effects when designing their system.
DAC5662IPFBRG4 datasheet
by Texas Instruments
