DS1807 Datasheet, PDF (1/13 Pages) Dallas Semiconductor – Addressable Dual Audio Taper Potentiometer

DS1807
Addressable Dual Audio Taper Potentiometer
www.dalsemi.com
FEATURES
§ 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 DESCIPTION
L0, L1
- Low End of Resistor
H0, H1
- High End of Resistor
W0,W1
- Wiper Terminal of Resistor
V_CC
A0..A2
- 3V/5V Power Supply Input
- Chip Select Inputs
SDA
- Serial Data I/O
SCL
- Serial Clock Input
GND
- Ground
AGND
- Analog Ground
NC
- No connection
PIN ASSIGNMENT
GND 1
A2 2
A1 3
A0 4
W0 5
L0 6
H0 7
14
V_CC
13 SCL
12 SDA
11 AGND
10 H1
9 L1
8 W1
DS1807 14-Pin DIP (300-mil)
DS1807E 14-Pin TSSOP (173-mil)
GND 1
A2 2
A1 3
NC 4
A0 5
W0 6
L0 7
H0 8
16
V_CC
15 NC
14 SCL
13 SDA
12 AGND
11 H1
10 L1
9 W1
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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