AD5790

Data Sheet

Rev. E | Page 20 of 27

Table 8. Hardware Control Pins Truth Table

LDAC

CLR

RESET

Function

0

The AD5790 is in reset mode. The device cannot be programmed.

The AD5790 is returned to its power-on state. All registers are set to their default values.

0

0

1

The DAC register is loaded with the clearcode register value and the output is set accordingly.

0

1

1

The output is set according to the DAC register value.

1

0

1

The DAC register is loaded with the clearcode register value and the output is set accordingly.

1

1

The output is set according to the DAC register value.

0

1

The output remains at the clearcode register value.

1

1

The output remains set according to the DAC register value.

0

1

The output remains at the clearcode register value.

1

1

The DAC register is loaded with the clearcode register value and the output is set accordingly.

0

1

The DAC register is loaded with the clearcode register value and the output is set accordingly.

1

1

The output remains at the clearcode register value.

0

1

The output is set according to the DAC register value.

1

X is don’t care.

Table 9. DAC Register

MSB

LSB

DB23

DB22

DB21

DB20

DB19 to DB0

R/W

Register address

DAC register data

R/W

0

0

1

20 bits of data