AD5602 datasheet(19/24 Pages) AD

19 / 24 page

AD5602/AD5612/AD5622

Rev. B | Page 19 of 24

READ OPERATION

When reading data back from the AD5602/AD5612/AD5622,

the user begins with a start command followed by an address

byte (R/W = 1), after which the DAC acknowledges that it is

prepared to transmit data by pulling SDA low. Two bytes of data

are then read from the DAC, which are both acknowledged by

the master as shown in Figure 45, Figure 46, and Figure 47. A

stop condition follows.

SCL

SDA

START BY

MASTER

ACK. BY

AD5602

ACK. BY

MASTER

NO ACK. BY

MASTER

STOP BY

MASTER

FRAME 2

MOST SIGNIFICANT DATA BYTE FROM AD5602

FRAME 1

SERIAL BUS ADDRESS BYTE

R/W

PD1

PD0

SCL (CONTINUED)

SDA (CONTINUED)

FRAME 3

LEAST SIGNIFICANT DATA BYTE FROM AD5602

Figure 45. AD5602 Read Sequence

SCL

SDA

START BY

MASTER

ACK. BY

AD5612

ACK. BY

MASTER

NO ACK. BY

MASTER

STOP BY

MASTER

FRAME 2

MOST SIGNIFICANT DATA BYTE FROM AD5612

FRAME 1

SERIAL BUS ADDRESS BYTE

R/W

PD1

PD0

SCL (CONTINUED)

SDA (CONTINUED)

FRAME 3

LEAST SIGNIFICANT DATA BYTE FROM AD5612

Figure 46. AD5612 Read Sequence

SCL

SDA

START BY

MASTER

ACK. BY

AD5622

ACK. BY

MASTER

NO ACK. BY

MASTER

STOP BY

MASTER

FRAME 2

MOST SIGNIFICANT DATA BYTE FROM AD5622

FRAME 1

SERIAL BUS ADDRESS BYTE

R/W

PD1

PD0

D11

D10

SCL (CONTINUED)

SDA (CONTINUED)

FRAME 3

LEAST SIGNIFICANT DATA BYTE FROM AD5622

Figure 47. AD5622 Read Sequence

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