JAJS398F January 2009 – April 2018 DAC7568 , DAC8168 , DAC8568
PRODUCTION DATA.
The DAC7568, DAC8168, and DAC8568 contain a power-on reset circuit that controls the output voltage during power-up. For device grades A and C on power-up, all DAC registers are filled with zeros and the output voltages of all DAC channels are set to zero scale. For device grades B and D all DAC registers are set to have all DAC channels power up in midscale. All DAC channels remain that way until a valid write sequence and load command are made to the respective DAC channel. The power-on reset is useful in applications where it is important to know the state of the output of each DAC while the device is in the process of powering up. No device pin should be brought high before power is applied to the device. The internal reference is powered off / down by default and remains that way until a valid reference-change command is executed.