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110499

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

- 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

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

A2

2

15

NC

A1

3

14

SCL

NC

4

13

SDA

A0

5

12

AGND

W0

6

11

H1

L0

7

10

L1

H0

8

9

W1

DS1807S 16-Pin SOIC (300-mil)

See mech. Drawings Section