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Rainbow Electronics DS1805 User Manual

Ds1805 addressable digital potentiometer, General description, Applications

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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

DS1805-050*: 50k

DS1805-100*: 100k

DS1805

Addressable Digital Potentiometer

______________________________________________ Maxim Integrated Products

1

14

13

12

11

10

9

8

1

2

3

4

5

6

7

V

CC

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

V

CC

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

TEM P RANGE

PIN- PACKAGE

RESISTANCE

( K

)

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.