REV. F

AD5305/AD5315/AD5325

–13–

WRITE OPERATION

When writing to the AD5305/AD5315/AD5325 DACs, the user

must begin with an address byte (R/

W = 0), after which the DAC

will acknowledge that it is prepared to receive data by pulling

SDA low. This address byte is followed by the pointer byte,

which is also acknowledged by the DAC. Two bytes of data are

then written to the DAC, as shown in Figure 8. A STOP condi-

tion follows.

MOST SIGNIFICANT DATA BYTE

LEAST SIGNIFICANT DATA BYTE

0

001

1

A0

R/

W

XX

LSB

ACK

BY

AD53x5

ACK

BY

AD53x5

MSB

ADDRESS BYTE

START

COND

BY

MASTER

SCL

SDA

SCL

SDA

MSB

LSB

MSB

LSB

ACK

BY

AD53x5

ACK

BY

AD53x5

STOP

COND

BY

MASTER

POINTER BYTE

0

Figure 8. Write Sequence