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101599

FEATURES

§ 3V or 5V Power Supplies

§ Ultra-low power consumption

§ Two digitally controlled, 256-position

potentiometers

§ 14-Pin TSSOP (173 mil) and 16-Pin SOIC

(150 mil) packaging available for surface

mount applications

§ Addressable using 3-Chip Select Inputs

§ Serial/Synchronous Bus Inputs

§ Operating Temperature Range:

-

Industrial: -40

°C to +85°C

§ Standard Resistance Values:

-

DS1803-010

10k

Ω

-

DS1803-050

50k

Ω

-

DS1803-100

100k

Ω

PIN ASSIGNMENT

PIN DESCRIPTION

L0, L1

- Low End of Resistor

H0, H1

- High End of Resistor

W0,W1

- Wiper terminal of Resistor

- 3V/5V Power Supply Input

A0..A2

- Chip Select Inputs

SDA

- Serial Data I/O

SCL

- Serial Clock Input

GND

- Ground

NC

- No connection

DESCRIPTION

The DS1803 Addressable Dual Digital Potentiometer is an addressable device having two independently

controlled potentiometers. Each potentiometer’s wiper can be set to one of 256 positions. Device control

is achieved via a 2-wire serial interface having a data I/O terminal and a clock input terminal. Device

addressing is provided through three chip select input terminals and correct communication protocol.

Addressing capability, when operating in a bus topology, allows up to eight devices to be controlled by

the serial interface. The exact wiper position of each potentiometer can be written or read. The DS1803

is available in a 16-pin DIP, 16-pin SOIC and 14-pin TSSOP package. The device is available in three

standard resistance values: 10k

Ω , 50kΩ, and 100kΩ , and is specified over the industrial temperature

range.

DS1803

Addressable Dual Digital Potentiometer

www.dalsemi.com

H1

1

14

VCC

L1

2

13

NC

W1

3

12

H0

A2

4

11

L0

A1

5

10

W0

A0

6

9

SDA

GND

7

8

SCL

DS1803 14-PIN TSSOP (173 MIL)

H1

1

16

VCC

NC

2

15

NC

L1

3

14

H0

W1

4

13

L0

A2

5

12

W0

A1

6

11

NC

A0

7

10

SDA

GND

8

9

SCL

DS1803Z 16-PIN SOIC (150 MIL)

DS1803 16-PIN DIP (300 MIL)

See mech. Drawings Section