Datasheet

Evaluation Board User Guide UG-384
Rev. 0 | Page 5 of 12
FEATURES OF THE AD5570 EVALUATION BOARD
SOFTWARE
The software allows the user to control all the functionality of
the AD5570. The main features are as follows:
• Load DAC register with a 16-bit word and update the
AD5570 output.
• Data readback of the contents of the input shift register.
• Power down/power up the AD5570.
• Clear the AD5570 output to 0 V.
Each of these features is described in the following sections.
Load DAC
In the Input Data field, the user types the 16-bit word to be
programmed to the AD5570 and clicks the WRITE TO DAC
button.
In LDAC synchronous loading mode, the WRITE TO DAC
button writes the required data to the input shift register and
toggles the LDAC signal, which then loads the DAC register
and updates the output voltage.
In LDAC asynchronous loading mode, the WRITE TO DAC
button writes the required data to the input shift register, but
the user toggles the LDAC signal by clicking the LDAC switch
to load the DAC register and update the output voltage.
Data Readback
Clicking the READ REGISTER button reads back and displays
the current contents of the DAC register.
Power Down/Power Up
This function allows the user to place the AD5570 in power-
down mode and to remove the AD5570 from power-down
mode. Clicking the POWER DOWN switch places the AD5570
in power-down mode, at the same time the text on the button
changes to POWER UP, indicating that clicking the button
again removes the AD5570 from power-down mode.
Clear
Clicking the CLEAR switch causes the
CLR
signal of the
AD5570 to be pulsed low, which has the effect of setting the
output voltage to 0 V.