Rainbow Electronics DS1801 - Manual

1 of 10 030300
FEATURES
Ultra-low power consumption
Operates from 3V or 5V supplies
Two digitally controlled, 65-position
potentiometers including mute
Logarithmic resistive characteristics (1 dB
per step)
Zero-crossing detection eliminates noise
caused by wiper movement
Serial port provides means for setting and
reading both potentiometers wipers
14-pin PDIP, 16-pin SOIC, and 14-pin
TSSOP packages
Operating Temperature Range:
- Industrial: -40
°C to +85°C
Software mute
Resistance available: 45 k
Ω
PIN DESCRIPTION
L0, L1 - Low End of Resistor
H0, H1 - High End of Resistor
W0,W1 - Wiper End of Resistor
V
CC
- 3V or 5V Power Supply Input
RST - Serial Port Reset Input
D - Serial Port Data Input
CLK - Serial Port Clock Input
GND - Digital Ground
AGND - Analog Ground
ZCEN - Zero-Crossing Detect Input
C
OUT
- Cascade Output
NC - No Connect
PIN ASSIGNMENT
DESCRIPTION
The DS1801 is a dual audio taper potentiometer having logarithmic resistive characteristics over the
device range. Each potentiometer provides 65 wiper positions with a 1 dB increment per step and device
mute. The 3-wire serial interface, using a CPU, provides the user the ability of reading or writing exact
wiper positions of the two potentiometers. Additionally, the part contains a zero-crossing detection
feature that minimizes noise resulting from wiper transitions. Packages for the part include a 14-pin
PDIP, 16-pin SOIC, and 14-pin TSSOP.
DS1801
Dual Audio Taper Potentiometer
www.dalsemi.com
GND 1 14 VCC
COUT 2 13 CLK
RST 3 12 D
ZCEN 4 11 AGND
W0 5 10 H1
L0 6 9 L1
H0 7 8 W1
DS1801 14-Pin PDIP (300-mil)
DS1801 14-Pin TSSOP (173-mil)
GND 1 16 VCC
COUT 2 15 CLK
RST 3 14 D
ZCEN 4 13 NC
NC 5 12 AGND
W0 6 11 H1
L0 7 10 L1
H0 8 9 W1
DS1801S 16-PIN SOIC (300-mil)
See Mech. Drawings Section