The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital supply (DVCC). This ensures that the internal analog and digital circuits are properly initialized.
To ensure accurate output voltage levels, it is essential to use a high-quality external voltage reference (VREF) and to decouple the VREF pin with a capacitor to reduce noise. Additionally, the output voltage should be buffered with an op-amp to prevent loading effects.
The DAC5662AIPFBR can sink or source up to 10 mA of output current. However, it is recommended to limit the output current to 5 mA or less to ensure accurate output voltage levels and to prevent overheating.
To implement a bipolar output voltage range, you can use an external op-amp to amplify and shift the output voltage of the DAC. For example, you can use an op-amp in a non-inverting amplifier configuration with a gain of 2 and a voltage offset of -VREF/2 to achieve a bipolar output voltage range of -VREF to +VREF.
The DAC5662AIPFBR's performance is affected by temperature, with the output voltage accuracy and linearity degrading as the temperature increases. The device is specified to operate over a temperature range of -40°C to +125°C, and the user should consider the temperature coefficient of the output voltage when designing their system.
DAC5662AIPFBR datasheet
by Texas Instruments
