The recommended power-up sequence is to power up the VDD pin first, followed by the AVDD pin, and then the digital interface pins. This ensures that the internal analog and digital circuits are properly initialized.
To ensure accurate voltage output, it is essential to use a high-quality external reference voltage source, and to decouple the AVDD pin with a 10uF capacitor to reduce noise. Additionally, the output voltage should be buffered with an op-amp to prevent loading effects.
The maximum output current capability of the DAC7564 is 5mA per channel. Exceeding this limit may cause the output voltage to droop or the device to overheat.
To implement a voltage output range other than 0-5V or 0-10V, you can use an external amplifier or attenuator circuit to scale the output voltage. Alternatively, you can use a resistive divider network to achieve the desired output range.
The settling time of the DAC7564 is typically around 10us. This means that the output voltage may take up to 10us to stabilize after a code change. In systems where fast settling time is critical, you may need to add additional circuitry to ensure that the output voltage is stable before taking a measurement or performing a subsequent operation.
DAC7564ICPWR datasheet
by Texas Instruments
