General Description

The DS1805 addressable digital potentiometer contains

a single 256-position digitally controlled potentiometer.

Device control is achieved through a 2-wire serial inter-

face. Device addressing is provided through three

address inputs that allow up to eight devices on a sin-

gle 2-wire bus. The exact wiper position of the poten-

tiometer can be written or read. The DS1805 is

available in 16-pin SO and 14-pin TSSOP packages.

The device is available in three standard resistance val-

ues: 10k

Ω, 50kΩ, and 100kΩ. The DS1805 is specified

over the industrial temperature range. The DS1805

provides a low-cost alternative for designs based on

the DS1803, but require only a single potentiometer.

Applications

CCFL Inverters

PDAs and Cell Phones

Portable Electronics

Multimedia Products

Instrumentation and Industrial Controls

Features

♦ 3V or 5V Operation

♦ Low Power Consumption

♦ One Digitally Controlled, 256-Position

Potentiometer

♦ Compatible with DS1803-Based Designs

♦ 14-Pin TSSOP (173mil) and 16-Pin SO (150mil)

Available for Surface-Mount Applications

♦ Three Address Inputs

♦ Serial 2-Wire Bus

♦ Operating Temperature Range

Industrial: -40°C to +85°C

♦ Standard Resistance Values

DS1805-010: 10k

Ω

DS1805-050*: 50k

Ω

DS1805-100*: 100k

Ω

Addressable Digital Potentiometer

______________________________________________ Maxim Integrated Products

1

14

13

12

11

10

9

8

1

2

3

4

5

6

7

N.C.

N.C.

N.C.

A2

W1

L1

H1

TOP VIEW

N.C.

SDA

SCL

GND

A0

A1

14 TSSOP (173mil)

DS1805E

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

H1

N.C.

N.C.

N.C.

N.C.

N.C.

SDA

SCL

16 SO (150mil)

N.C.

L1

A1

W1

A2

A0

GND

DS1805Z

Pin Configurations

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

RESISTANCE

(K

Ω)

DS1805E-010

-40°C to +85°C

14 TSSOP (173mil)

10

DS1805E-050*

-40°C to +85°C

14 TSSOP (173mil)

50

DS1805E-100*

-40°C to +85°C

14 TSSOP (173mil)

100

DS1805Z-010

-40°C to +85°C

16 SO (150mil)

10

DS1805Z-050*

-40°C to +85°C

16 SO (150mil)

50

DS1805Z-100*

-40°C to +85°C

16 SO (150mil)

100

XX-XXXX; Rev 0; 4/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Add “/T&R” for tape-and-reel orders.

*Future product.