The DS1807 Addressable Dual Audio Taper Potentiometer has symmetric volume potentiometer characteristics, each potentiometer having a total of 65 wiper positions including the mute position. Adjacent wiper positions are separated by 1 dB, providing a total attenuation range of 64 dB. When the wipers are in the mute position, attenuation in excess of 90 dB is achieved. The potentiometer also provides a zero-crossing detection capability. This capability eliminates noise caused by discrete wiper position changes. The potentiometer is controlled by a two-input, serial synchronous interface, which provides the capability of addressing up to eight different DS1807s. Addressability is obtained via communication protocol and three (3) address select inputs.
The DS1807 Addressable Dual Audio Taper Potentiometer provides two logarithmic 65‑position potentiometers (including a mute position) for precise audio attenuation. Each step is 1 dB, giving a total attenuation range of 64 dB, with over 90 dB attenuation in the mute position. The device includes zero‑crossing detection to eliminate zipper noise during wiper changes.
The part is controlled via a 2‑wire serial/synchronous bus with three address select inputs (A0‑A2), allowing up to eight devices to be addressed on the same bus. It operates from 3 V to 5 V (2.7 V – 5.5 V typical) and is offered in 14‑pin DIP, 16‑pin SOIC and 14‑pin TSSOP packages. Detailed electrical characteristics, timing diagrams and command protocols are provided for both read and write operations.
| Supply Voltage (VCC) | 2.7 V – 5.5 V |
|---|---|
| Standard Resistance | 45 kΩ |
| Number of Wiper Positions | 65 (including mute) |
| Attenuation Range | 64 dB (mute >90 dB) |
| Zero‑Crossing Detection | Enabled/disabled via software |
| Addressable Devices per Bus | 8 |
The DS1807 provides a total attenuation range of 64 dB, and the mute position gives more than 90 dB of attenuation.
Up to eight DS1807 devices can be addressed using the three chip‑select inputs A0, A1 and A2.
The standard resistance of the DS1807 is 45 kΩ.
The device operates from 2.7 V to 5.5 V (commonly 3 V to 5 V).