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100899

FEATURES

§ Ultra-lowpower consumption, quiet, pumpless

design

§ Two digitally controlled, 256-position

potentiometers

§ Serial port provides means for setting and

reading both potentiometers

§ Resistors can be connected in series to

provide increased total resistance

§ 20-pin TSSOP, 16-pin SOIC, and 14-pin DIP

packages are available.

§ Resistive elements are temperature

compensated to

±0.3 LSB relative linearity

§ Standard resistance values:

-

DS1868-10

∼10 kΩ

-

DS1868-50

∼50 kΩ

-

DS1868-100

∼100 kΩ

§ +5V or ±3V operation

§ Operating Temperature Range:

-

Industrial: -40°C to 85°C

PIN ASSIGNMENT

PIN DESCRIPTION

L0, L1

- Low End of Resistor

H0, H1

- High End of Resistor

W0, W1

- Wiper Terminal of Resistor

- Stacked Configuration Output

RST

- Serial Port Reset Input

DQ

- Serial Port Data Input

CLK

- Serial Port Clock Input

- Cascade Port Output

- +5 Volt Supply

GND

- Ground Connections

NC

- No Internal Connection

- Substrate Bias Voltage

DNC

- Do Not Connect

*All GND pins must be connected to ground.

DESCRIPTION

The DS1868 Dual Digital Potentiometer Chip consists of two digitally controlled solid-state

potentiometers. Each potentiometer is composed of 256 resistive sections. Between each resistive section

and both ends of the potentiometer are tap points which are accessible to the wiper. The position of the

DS1868

Dual Digital Potentiometer Chip

www.dalsemi.com

20-Pin TSSOP (173-mil)

DNC

H1

L1

W1

RST

CLK

DNC

DNC

GND

DNC

DNC

W0

H0

L0

DNC

DQ

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

DS1868S 16-Pin SOIC (300-mil)

NC

H1

L1

W1

RST

CLK

GND

NC

W0

H0

L0

DQ

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

14-Pin DIP (300-mil)

H1

L1

W1

RST

CLK

W0

H0

L0

14

13

12

11

10

8

1

2

3

4

5

7

DQ

GND

9

6