The DS1805 addressable digital potentiometer contains a single 256-position digitally controlled potentiometer. Device control is achieved through a 2-wire serial inter- face. Device addressing is provided through three address inputs that allow up to eight devices on a sin- gle 2-wire bus. The exact wiper position of the poten- tiometer can be written or read. The DS1805 is available in 16-pin SO and 14-pin TSSOP packages. The device is available in three standard resistance val- ues: 10kΩ, 50kΩ, and 100kΩ. The DS1805 is specified over the industrial temperature range. The DS1805 provides a low-cost alternative for designs based on the DS1803, but require only a single potentiometer. Applications CCFL Inverters PDAs and Cell Phones Portable Electronics Multimedia Products Instrumentation and Industrial Controls Features ♦ 3V or 5V Operation ♦ Low Power Consumption ♦ One Digitally Controlled, 256-Position Potentiometer ♦ Compatible with DS1803-Based Designs ♦ 14-Pin TSSOP (173mil) and 16-Pin SO (150mil) Available for Surface-Mount Applications ♦ Three Address Inputs ♦ Serial 2-Wire Bus ♦ Operating Temperature Range Industrial: -40°C to +85°C ♦ Standard Resistance Values DS1805-010: 10kΩ DS1805-050*: 50kΩ DS1805-100*: 100kΩ DS1805 Addressable Digital Potentiometer ______________________________________________ Maxim Integrated Products 1 14 13 12 11 10 9 8 1 2 3 4 5 6 7 VCC N.C. N.C. N.C. A2 W1 L1 H1 TOP VIEW N.C. SDA SCL GND A0 A1 14 TSSOP (173mil) DS1805E
The DS1805 digital potentiometer provides a single 256‑position resistor array that can be controlled via a 2‑wire serial bus. Up to eight devices can share the same bus using three address inputs, making it suitable for compact, multi‑device designs.
It is offered in 14‑pin TSSOP and 16‑pin SO packages, operates from 2.7 V to 5.5 V, and is specified for an industrial temperature range of –40 °C to +85 °C. The device includes a volatile SRAM register and supports both standard (100 kHz) and fast (400 kHz) bus modes.
| Number of Positions | 256 |
|---|---|
| Package Types | 14‑Pin TSSOP, 16‑Pin SO |
Up to eight devices can be addressed on a single bus.
The DS1805 is a volatile device and does not retain the wiper position after power‑down.