EVAL-AD5755-1SDZ Ver la hoja de datos (PDF) - Analog Devices

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EVAL-AD5755-1SDZ

Evaluation Board User Guide

Analog Devices 

Evaluation Board User Guide

CONTROL OF DIGITAL PINS

The RESET, LDAC, POC, and ALERT pins can all be controlled

by clicking the relevant boxes shown in Figure 9. The FAULT

and ALERT boxes display the status of the ALERT and FAULT

pins. The FAULT and ALERT pins of the device are polled by

the evaluation software every ~100 ms. The FAULT pin is also

connected to the reference LED, D1, on the evaluations board,

and ALERT is connected to the orange LED, D14.

WRITING TO DATA REGISTERS

This function allows you to write to all the data registers.

Select the register to write to from the pull-down menu, enter

the 16-bit data-word to be written (in hexadecimal) and click

WRITE to load data to the register. Note that the gain and

offset registers do not update until the DAC has been written to.

READING FROM REGISTERS

This function allows you to read from all the data registers,

control registers, and the status register. Select the register to

read from the pull-down menu and click READ. The 16 bits of

LSB data appear in the number box in hexadecimal format.

UG-244

WRITING TO THE DAC CONTROL REGISTERS

This function allows you to write to and configure the DAC

control register for a selected channel. Select the required DAC

channel to be configured from the pull-down menu. After

configuring the settings you require, click WRITE to write to

the device. The LSB data written to the selected channel’s DAC

control register is shown in the register display at the top right

of Figure 12.

Table 9. DAC Control Register Functions

Option

Description

EN Internal

Powers up internal amplifiers. This should be

done when enabling the output.

EN Clear

Selects if the channel clears when the CLEAR

pin is activated.

EN Output

Enables/disables the selected output channel.

Rset

Selects whether internal or external sense

resistor is used when using a current range.

EN DC-DC

Powers up/down the dc-to-dc converter on a

selected channel. To correctly power down the

dc-to-dc converter, EN Output and EN Internal

must also be disabled.

Over-Range

Enables/disables 20% overrange. This is

available on VOUT ranges only.

Output Range Selects the output range for the specified

channel.

Figure 9. Digital Pin Controls and Indicators in the Evaluation Software

Figure 10. Write to Data Register in the Evaluation Software

Figure 11. Read from Register in the Evaluation Software

Figure 12. Write to the DAC Control Registers in the Evaluation Software

Rev. B | Page 7 of 16

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