AD8402AN1 데이터 시트보기 (PDF) - Analog Devices

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AD8402AN1

1-/2-/4-Channel Digital Potentiometers

Analog Devices 

AD8400/AD8402/AD8403

Table 9. AD8403 Pin Function Descriptions

Pin No. Mnemonic Description

1

AGND2

Analog Ground 2.1

2

B2

Terminal B RDAC 2.

3

A2

Terminal A RDAC 2.

4

W2

Wiper RDAC 2, Addr = 012.

5

AGND4

Analog Ground 4.1

6

B4

Terminal B RDAC 4.

7

A4

Terminal A RDAC 4.

8

W4

Wiper RDAC 4, Addr = 112.

9

DGND

Digital Ground.1

10

SHDN

Active Low Input. Terminal A open circuit. Shutdown controls Variable Resistor 1 through Variable Resistor 4.

11

CS

Chip Select Input, Active Low. When CS returns high, data in the serial input register is decoded,

based on the address bits, and loaded into the target DAC register.

12

SDI

Serial Data Input.

13

SDO

Serial Data Output. Open drain transistor requires a pull-up resistor.

14

CLK

Serial Clock Input, Positive Edge Triggered.

15

RS

Active Low Reset to Midscale. Sets RDAC registers to 80H.

16

VDD

Positive Power Supply. Specified for operation at both 3 V and 5 V.

17

AGND3

Analog Ground 3.1

18

W3

Wiper RDAC 3, Addr = 102.

19

A3

Terminal A RDAC 3.

20

B3

Terminal B RDAC 3.

21

AGND1

Analog Ground 1.1

22

W1

23

A1

Wiper RDAC 1, Addr = 002.

Terminal A RDAC 1.

24

B1

Terminal B RDAC 1.

1 All AGND pins must be connected to DGND.

Rev. E | Page 13 of 32

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