The DS1805 is an addressable digital potentiometer from Maxim Integrated. It has two-wire serial interface, 3V or 5V operation, low power consumption, programmable 256-bit potentiometer, compatible with DS1803 designs, and 14-pin TSSOP and 16-pin SO.
The DS1805 digital potentiometer provides a single 256‑position resistor array that can be addressed over a 2‑wire serial bus. Up to eight devices can share the same bus using three address inputs (A0‑A2). The part is offered in 14‑pin TSSOP and 16‑pin SO packages and operates from 2.7 V to 5.5 V.
The device is specified for industrial temperature ranges (‑40 °C to +85 °C) and includes detailed absolute‑maximum ratings, electrical characteristics, and timing diagrams for both standard (100 kHz) and fast (400 kHz) bus modes. It supports read and write operations to two internal 8‑bit registers for wiper control and a scratch‑pad register.
| Package Types | 14‑pin TSSOP (173 mil) and 16‑pin SO (150 mil) |
|---|---|
| Standard Resistance Values | 10 kΩ, 50 kΩ, 100 kΩ |
| Operating Temperature Range | ‑40 °C to +85 °C |
| Supply Voltage | 2.7 V to 5.5 V |
| Supply Current (Active) | 200 µA typical |
| Wiper Resistance | 400 Ω to 1000 Ω |
Up to eight devices can share the bus using three address inputs (A0‑A2).
The DS1805 is offered in 10 kΩ, 50 kΩ, and 100 kΩ standard resistance values.
It operates from 2.7 V to 5.5 V.
The part is specified for temperatures from –40 °C to +85 °C.