AD5413 - output ranges

The AD5413 requires dual supplies to output bipolar output ranges. There is a need to account for a maximum headroom on top of the output voltage/current range when deciding on the voltage supplies to apply to the DAC.

The AD5413 can be supplied with +33V positive analog supply (AVDD1) and -33V negative analog supply (AVSS) in order to have the capability to output either of the programmable output ranges available. However, the maximum operating range between AVDD1 and AVSS is 50 V.

If unipolar voltage output is required there is a maximum AVSS voltage of -2 V that must be met for correct operation. For current output mode, AVSS can be connected to AGND.

In addition to AVDD1, a second positive analog supply (AVDD2) is required. AVDD2 can be connected to a power supply between 4.5V and 33V. In cases where low power consumption is not a concern, AVDD2 can be tied to AVDD1.

A digital supply in the range of 1.7V to 5.5V is also required to be connected to VLOGIC. In cases where low power consumption is not a concern, the output of the VLDO can be connected to VLOGIC.