DS1803
Addressable Dual Digital Potentiometer
www.dalsemi.com
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° to +85°
C
C
§
Standard Resistance Values:
- DS1803-010
10kΩ
- DS1803-050
50kΩ
- DS1803-100
100kΩ
PIN ASSIGNMENT
H1
L1
W1
A2
A1
A0
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
NC
H0
L0
W0
SDA
SCL
DS1803 14-PIN TSSOP (173 MIL)
H1
NC
L1
W1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
NC
H0
L0
W0
NC
SDA
SCL
PIN DESCRIPTION
L0, L1
H0, H1
W0,W1
V
CC
A0..A2
SDA
SCL
GND
NC
-
-
-
-
-
-
-
-
-
Low End of Resistor
High End of Resistor
Wiper terminal of Resistor
3V/5V Power Supply Input
Chip Select Inputs
Serial Data I/O
Serial Clock Input
Ground
No connection
A2
A1
A0
GND
DS1803Z 16-PIN SOIC (150 MIL)
DS1803 16-PIN DIP (300 MIL)
See mech. Drawings Section
DESCRIPTION
The DS1803 Addressable Dual Digital Potentiometer is an addressable device having two independently
controlled potentiometers. Each potentiometer’ wiper can be set to one of 256 positions. Device control
s
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: 10kΩ , 50kΩ , and 100kΩ , and is specified over the industrial temperature
range.
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