Rainbow Electronics DS1807 - Manual

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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 k
Ω
PIN ASSIGNMENT
PIN DESCIPTION
L0, L1 - Low End of Resistor
H0, H1 - High End of Resistor
W0,W1 - Wiper Terminal of Resistor
V
CC
- 3V/5V Power Supply Input
A0..A2 - Chip Select Inputs
SDA - Serial Data I/O
SCL - Serial Clock Input
GND - Ground
AGND - Analog Ground
NC - No connection
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.
DS1807
Addressable Dual Audio Taper Potentiometer
www.dalsemi.com
GND 1 14 V
CC
A2 2 13 SCL
A1 3 12 SDA
A0 4 11 AGND
W0 5 10 H1
L0 6 9 L1
H0 7 8 W1
DS1807 14-Pin DIP (300-mil)
DS1807E 14-Pin TSSOP (173-mil)
GND 1 16 V
CC
A2 2 15 NC
A1 3 14 SCL
NC 4 13 SDA
A0 5 12 AGND
W 0 6 11 H1
L0 7 10 L1
H0 8 9 W1
DS1807S 16-Pin SOIC (300-mil)
See mech. Drawings Section