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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

- 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

- 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