AD5668ARUZ-2

The available bit resolutions for the AD5628, AD5648, and AD5668 DACs are as follows: - AD5628: 12 bits - AD5648: 14 bits - AD5668: 16 bits .

The purpose of the on-chip reference with an internal gain of 2 in the AD5628/AD5648/AD5668 DACs is to provide a stable reference voltage for the DAC operation. This internal reference allows for a full-scale output range of either 2.5 V or 5 V, depending on the specific version of the DAC being used. The on-board reference is initially turned off at power-up, enabling the use of an external reference if needed. The internal reference can be enabled through a software write, providing flexibility in the reference voltage selection for the DAC operation. Additionally, the internal reference is available at the VREFOUT pin, but a buffer is recommended for driving external loads for reference stability.

The power-down current for the AD5628/AD5648/AD5668 DAC at 5V supply is 400nA, and at 3V supply, it is 200nA.