Datasheet

_________________________________________________________________ Maxim Integrated Products 8

Evaluates: MAX5823/MAX5824/

MAX5825A/MAX5825B

MAX5825A Evaluation Kit

Asynchronous LDAC

Checking the LDAC Asserted checkbox drives the LDAC

pin of the device low, which allows writing to the CODE

ister to change the DAC’s output. Unchecking the LDAC

Asserted checkbox drives the LDAC pin high. To change

the DAC outputs, the user must write to the CODE regis-

ters and then write to the DAC registers.

Interface Watch Dog

Use the Mask checkbox, Timeout edit box, and Safety

Level radio buttons in the Interface Watch Dog group

box to set the watchdog. The timeout time range that

can be entered into the edit box is 1ms to 4095ms. The

user must allow enough timeout time to send data to the

DAC(s). It is recommended that the user set the timeout

time to the maximum time of 4095ms since the time that

Windows takes to communicate with the part can vary. In

addition, configure the DAC output settings before press-

ing the EXECUTE button. The IRQ circle changes from

white to red when the IRQ signal goes low.

Refer to the MAX5823/MAX5824/MAX5825 IC data sheet

for a detailed description.

Configuration

The configuration command includes the Watch Dog

radio buttons and the GATE_ENB, LDAC_ENB, and

CLEAR_ENB checkboxes for selected DAC(s). See the

Configuration Status tab sheet to monitor the settings

on each DAC. Refer to MAX5823/MAX5824/MAX5825 IC

data sheet for a detailed description.

Power

The power command is selectable for individual DACs.

When a DAC is selected, the channel is active. Other

options include powering down with 1kI termination

to GND, 100kI termination to GND, and high imped-

ance. Once the appropriate selection is made, press the

EXECUTE button.

Reset

The reset command allows the user to set or clear the

gate, refresh or reset the watchdog timer, or issue a

software reset or clear. Refer to the MAX5823/MAX5824/

MAX5825 IC data sheet for a detailed description.

Figure 5. Advanced User Interface Window (2-Wire Interface Tab)