Rainbow Electronics DS1805 - Manual

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
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 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.