AD5161BRM10 查看數據表（PDF） - Analog Devices

零件编号

产品描述 (功能)

生产厂家

AD5161BRM10

256-Position SPI/I2C Selectable Digital Potentiometer

Analog Devices 

AD5161

I2C INTERFACE

Data Sheet

Table 7. Write Mode

S 0 1 0 1 1 0 AD0 W A X RS SD X X X X X A D7 D6 D5 D4 D3 D2 D1 D0 A P

Slave Address Byte

Instruction Byte

Data Byte

Table 8. Read Mode

S 0 1 0 1 1 0 AD0 R A D7 D6 D5 D4 D3 D2 D1 D0 A P

Slave Address Byte

Data Byte

S = Start Condition

P = Stop Condition

A = Acknowledge

X = Don’t Care

W = Write

SCL

t2

SDA

t1

P

S

t8

t9

t3

t8

t6

t4

t9

R = Read

RS = Reset wiper to Midscale 80H

SD = Shutdown connects wiper to B terminal and open circuits

A terminal. It does not change contents of wiper register.

D7, D6, D5, D4, D3, D2, D1, D0 = Data Bits.

t2

t7

t5

t10

S

P

Figure 39. I2C Interface Detailed Timing Diagram

SCL

SDA

START BY

MASTER

1

9

1

9

1

9

0

1

0

11

0

FRAME 1

SLAVE ADDRESS BYTE

AD0 R/W

X

ACK BY

AD5161

RS SD X

X

X

X

FRAME 2

INSTRUCTION BYTE

X

D7 D6 D5 D4 D3 D2 D1 D0

ACK BY

AD5161

FRAME 3

DATA BYTE

ACK BY

AD5161

STOP BY

MASTER

Figure 40. Writing to the RDAC Register

SCL

SDA

START BY

MASTER

1

9

1

9

01

0

11

0 AD0 R/W

D7 D6 D5 D4 D3 D2 D1 D0

FRAME 1

SLAVE ADDRESS BYTE

ACK BY

AD5161

FRAME 2

RDAC REGISTER

NO ACK

BY MASTER

STOP BY

MASTER

Figure 41. Reading Data from a Previously Selected RDAC Register in Write Mode

Rev. B | Page 14 of 20

Share Link: