The DS1803 addressable dual digital potentiometer features two independently controlled 256-position potentiometers. Device control is achieved through a 2-wire serial interface. Three address pins allow up to 8 DS1803's to share the same 2-wire interface. The exact wiper position of each potentiometer can be written or read. The DS1803 is available in a 16-pin DIP, 16-pin SO, and 14-pin TSSOP package. The device is available in three standard resistance values: 10kΩ, 50kΩ, and 100kΩ and is specified over the industrial temperature range.
The DS1803 is an addressable dual digital potentiometer featuring two independently controlled 256‑position resistor arrays. It operates via a 2‑wire serial interface and supports up to eight devices on the same bus using three address pins. The device is available in 10 kΩ, 50 kΩ, and 100 kΩ resistance options and in 14‑pin TSSOP, 16‑pin SO, and 16‑pin DIP packages.
Electrical specifications include a supply voltage range of 2.7 V to 5.5 V, an operating temperature range of –40 °C to +85 °C, and typical wiper resistance between 400 Ω and 1 kΩ. The datasheet also provides timing diagrams, command protocols for reading and writing potentiometer values, and ordering information for various package and resistance variants.
| Supply Voltage (VCC) | 2.7 V – 5.5 V |
|---|---|
| Operating Temperature | -40 °C to +85 °C |
| Package Types | 14‑Pin TSSOP, 16‑Pin SO, 16‑Pin DIP |
| Standard Resistance Values | 10 kΩ, 50 kΩ, 100 kΩ |
| Wiper Resistance | 400 Ω – 1 kΩ |
Up to eight DS1803 devices can share the same 2‑wire interface using the three address pins.
No, the DS1803 is a volatile device and does not maintain the wiper position during power‑down.
The wiper position is set by writing an 8‑bit value to one of two registers via the 2‑wire serial interface.