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102199

FEATURES

§ Six digitally controlled 64-position

potentiometers

§ 3-wire serial port provides for reading and

setting each potentiometer

§ Devices can be cascaded for single processor

multi-device control

§ Standard resistance values:

-

DS1806-010

10 k

Ω

-

DS1806-050

50 k

Ω

-

DS1806-100

100 k

Ω

§ Operating Temperature Range:

-

Industrial temperature: -40

°C to +85°C

PIN DESCIPTION

- 3V or 5V Supply

RST

- Serial Port Reset Input

- Serial Port Data Input

CLK

- Serial Port Clock Input

- Cascade Data Output

H1 - H6

- High End terminal of Pot

W1 - W6

- Wiper Terminal of Pot

GND

- Ground

L1-3

- Low Terminal Pots 1 through 3

L4-6

- Low Terminal Pots 4 through 6

PIN ASSIGNMENT

DESCRIPTION

The DS1806 Digital Sextet Potentiometer is a six-channel, digitally controlled, solid-state linear

potentiometer. Each potentiometer is comprised of 63 equiresistive sections as illustrated in the block

diagram of Figure 1. Each potentiometer has three terminals accessible to the user. These include the high

through 3 share the same low-end terminal L1-3; likewise, potentiometers 4 through 6 share the low-end

terminal L4-6.

Each wiper’s position is selected via an 8-bit register value. Communication and control of the device is

accomplished via a 3-wire serial port interface. This interface in conjunction with a cascade output allows

the value of the device wiper settings to be read.

DS1806

Digital Sextet Potentiometer

www.dalsemi.com

W1

1

20

W2

2

19

H1

L1-3

3

18

H2

W3

4

17

H3

W4

5

16

H4

L4-6

6

15

H5

W6

7

14

W5

RST

8

13

H6

CLK

9

12

GND

10

11

DS1806 20-Pin DIP (300-mil)

DS1806S 20-Pin SOIC (300-mil)

DS1806E 20-Pin TSSOP (173-mil)

See Mech. Drawings Section