AD5665-RBRUZ-2 datasheet(22/32 Pages) AD

22 / 32 page

AD5625R/AD5645R/AD5665R, AD5625/AD5665

Preliminary Technical Data

Rev. PrA. | Page 22 of 32

R/W

SCL

SDA

DB23 D B22 DB2 1 D B20 DB19 DB 18 D B17 DB1 6

ACK. BY

AD56x5

START BY

MASTER

FRAME 1

SLAVE ADDRESS

FRAME 2

COMMAND BYTE

ACK. BY

AD56x5

DB7

DB6

DB5

D B4

D B3

D B2

DB 1

DB0

ACK. BY

AD56x5

STOP BY

MASTER

SCL

(CONTINUED)

SDA

(CONTINUED)

DB15 DB14 DB 13 D B12 DB 11 D B10 DB 9

DB8

ACK. BY

AD56x5

FRAME 3

MOST SIGNIFICANT

DATA BYTE

FRAME 4

LEAST SIGNIFICANT

DATA BYTE

Figure 52. I2C Write Operation (10-Pin Package)

R/W

SCL

SDA

DB23 DB 22 DB 21 DB2 0 DB19 DB1 8 DB1 7 D B16

ACK. BY

AD56x5

START BY

MASTER

FRAME 1

SLAVE ADDRESS

FRAME 2

COMMAND BYTE

ACK. BY

AD56x5

DB7

DB6

DB5

DB4

D B3

DB2

DB 1

DB0

ACK. BY

AD56x5

STOP BY

MASTER

SCL

(CONTINUED)

SDA

(CONTINUED)

DB15 DB 14 DB1 3 DB1 2 DB 11 DB10 DB9

DB 8

ACK. BY

AD56x5

FRAME 3

MOST SIGNIFICANT

DATA BYTE

FRAME 4

LEAST SIGNIFICANT

DATA BYTE

Figure 53. I2C Write Operation (14-Pin Package)

WRITE OPERATION

When writing to the AD5625R/AD5645R/AD5665R,

AD5625/AD5665, the user must begin with a start command

followed by an address byte (R/W = 0), after which the DAC

acknowledges that it is prepared to receive data by pulling SDA

low. The AD5665 requires two bytes of data for the DAC and a

command byte that controls various DAC functions. Three

bytes of data must therefore written to the DAC, the command

byte followed by the most significant data byte and the least

significant data byte, as shown in Figures 52 and 53. All these

data bytes are acknowledged by the

AD5625R/AD5645R/AD5665R, AD5625/AD5665. A stop

condition follows.

READ OPERATION

When reading data back from the

AD5625R/AD5645R/AD5665R, AD5625/AD5665, 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 Figures 54 and 55. A stop condition follows.

Note that the only data that can be read back from the AD56x5

is the contents of the input shift register (see section on Control

AD5665-RBRUZ-2 数据表(PDF) 22 Page - Analog Devices

AD5665-RBRUZ-2 数据表(HTML) 22 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

数据表下载

链接网址

AD5665-RBRUZ-2 数据表(PDF) 22 Page - Analog Devices

AD5665-RBRUZ-2 数据表(HTML) 22 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

数据表 下载

链接网址

数据表下载