The DS1803 is a dual digital potentiometer from MAXIM that features two independently controlled 256-position potentiometers. Device control is achieved through a 2-wire serial interface. Three address pins allow up to 8 DS1803s 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 with two independently controlled 256‑position resistor arrays. It operates over a 2‑wire serial interface (SDA, SCL) and supports three address inputs (AO, A1, A2) allowing up to eight devices on a single bus. The device is offered in 10 kΩ, 50 kΩ and 100 kΩ resistance options and in 14‑pin TSSOP, 16‑pin SO and 16‑pin DIP packages.
The datasheet provides electrical characteristics such as supply voltage (2.7 V – 5.5 V), active supply current (typ 3 pA), wiper resistance (400 – 1000 Ω), and operating temperature range (‑40 °C – +85 °C). Ordering information, pin descriptions, bus protocol details, and absolute maximum ratings are also included.
| Supply Voltage (VCC) | 2.7 V – 5.5 V |
|---|---|
| Active Supply Current | typ 3 pA |
| Wiper Resistance | 400 – 1000 Ω |
| Operating Temperature Range | -40 °C to +85 °C |
| Standard Resistance Values | 10 kΩ, 50 kΩ, 100 kΩ |
| Package Types | 14‑pin TSSOP, 16‑pin SO, 16‑pin DIP |
The DS1803 has three address inputs (AO, A1, A2) that allow up to eight devices to share the same 2‑wire interface.
It uses a 2‑wire serial interface consisting of SDA (data) and SCL (clock) lines.
The DS1803 is a volatile device; it does not retain the wiper position after power‑down.
It operates from –40 °C to +85 °C (industrial temperature range).