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072601

FEATURES

§ Two 32-position log-tapers

§ 60dB attenuation range:

–1dB per step (12 taps)

–2dB per step (12 taps)

–3dB per step (8 taps)

–90dB low-end attenuation

§ 2-Wire Interface Control

§ Power Supply: Dual ±12V

§ Maximum Voltage Across Potentiometers:

±12V

§ Standard Resistance Value: 45kW

§ Packages: 16-Pin SOIC

§ Operating Temperature: -40

ORDERING INFORMATION

DS1808Z-050

16-Pin SOIC -40ºC to

+85ºC 45kΩ

DS1808Z-050/T&R 16-Pin SOIC -40ºC to

+85ºC 45kΩ

PIN ASSIGNMENT

L1

A0

W0

W

H0

CE

H1

L0

1

12

11

10

9

7

13

15

6

5

4

3

2

14

A2

A1

SCL

SDA

8

GND

16

PIN DESCRIPTION

- +12V Supply

- -12V Supply (substrate bias)

- 5V Digital Supply

- High-end Terminals

- Low-end Terminals

- Wiper Terminals

SDA

- 2-Wire Serial Data Input/Output

SCL

- 2-Wire Clock Input

/CE

- 2-Wire Interface Enable

GND

- Ground

A0, A1, A2

- Address Pins

DESCRIPTION

The DS1808 is a dual-channel, digitally controlled, log-taper potentiometer. Each potentiometer is

comprised of 32 wiper terminal positions plus a mute position. The device has three accessible

potentiometer terminals that include the high-side terminal (H), the low-side terminal (L), and the wiper

terminal (W). The resolution of the DS1808 is shown in Figure 8 and represents 1dB per step for the first

12 taps, 2dB per step for the next 12 taps and 3dB per step for the bottom 8 taps, providing a total

attenuation range of 60dB. The mute position of the DS1808 provides greater than 90dB of attenuation.

The wiper position on the resistor ladder is selected via a 6-bit register, whose value is controlled by the

industry-standard 2-wire interface. The interface consists of two control signals: SDA and SCL. The

DS1808 is available in a standard 45k

W resistor value. The DS1808 is specified to operate over the

was designed for low-cost, stereo volume control applications. The device is specified to operate from

±12V ±10% supplies and accept a maximum input signal range of ±12V.

DS1808

Dual Log Digital Potentiometer

www.maxim-ic.com

16-Pin SOIC (150-mil)