DS1807
Addressable Dual Audio Taper Potentiometer
www.dalsemi.com
FEATURES
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Operates from 3V or 5V Power Supplies
Ultra-low power consumption
Two digitally controlled, 65-position
potentiometers
Logarithmic resistor characteristics (1 dB per
step)
Zero-crossing detection eliminates noise
caused by discrete wiper changes
Addressable using 3-Chip Select Inputs
Serial/Synchronous Bus Inputs
Operating Temperature Range:
- Industrial: -40°C to +85°C
Standard Resistance Value: 45 kΩ
PIN ASSIGNMENT
GND
A2
A1
A0
W0
L0
H0
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
SCL
SDA
AGND
H1
L1
W1
DS1807 14-Pin DIP (300-mil)
DS1807E 14-Pin TSSOP (173-mil)
GND
A2
A1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
NC
SCL
SDA
AGND
H1
L1
W1
PIN DESCIPTION
L0, L1
H0, H1
W0,W1
V
CC
A0..A2
SDA
SCL
GND
AGND
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
Analog Ground
No connection
NC
A0
W0
L0
H0
DS1807S 16-Pin SOIC (300-mil)
See mech. Drawings Section
DESCRIPTION
The DS1807 Addressable Dual Audio Taper Potentiometer is a dual audio taper potentiometer having a
logarithmic resistive characteristic. Each potentiometer has a total of 65 wiper positions including the
mute position. Adjacent wiper positions are separated by 1 dB giving a total attenuation range of 64 dB.
When the wipers are in the mute position, attenuation in excess of 90 dB is achieved. The DS1807 also
provides a zero-crossing detection capability. This capability eliminates noise caused by discrete wiper
position changes. The DS1807 is controlled via a two-input, serial synchronous interface that provides the
capability of addressing up to eight different DS1807s. Addressability is obtained via communication
protocol and three (3) address select inputs A0, A1, and A2. Communication protocol allows for the exact
positioning of the DS1807 wiper’s position. Additionally, communication protocol allows for
independent or simultaneous setting of the two potentiometers' wipers. Wiper positions can also be read
via the 2-wire serial interface.
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DALLAS [ DALLAS SEMICONDUCTOR ]
