The DS3903 contains three nonvolatile (NV) low temperature coefficient digital potentiometers, which can be accessed through a 2-wire bus. The DS3903 operates in both 3V and 5V systems, and it features a write-protect pin that can lock the positions of the potentiometers. An address pin allows two DS3903s to be placed on the same 2-wire bus.
Three 128-Position Linear Potentiometers (Two 10kΩ, One 100kΩ)
NV Wiper Storage
Low End-to-End Temperature Coefficient
Operates on an Industry-Standard 2-Wire Bus
Supply Range: 3V or 5V
Operating Temperature Range: -40°C to +85°C
A Small and Low-Cost Replacement for Mechanical Potentiometers
DESCRIPTION The DS1804 NV trimmer potentiometer is a nonvolatile digital potentiometer that has 100 positions. The device provides an ideal method for low-cost trimming applications using a CPU or manual control input with minimal external circuitry. Wiper position of the DS1804 can be stored in EEPROM memory on demand. The device’s wiper position is manipulated by a three-terminal port that provides an increment/ decrement counter controlled interface. This port consists of the control inputs CS, INC, and U/D. The DS1804 is available in three resistor grades, which include a 10kΩ, 50kΩ, and 100kΩ. The device is provided in an industrial temperature grade. Additionally, the DS1804 will operate from 3V or 5V supplies and is ideal for portable application requirements. Three packaging options are available and include the 8-pin (300 mils) DIP, 8-pin (150 mils) SO, and 8-pin (118 mils) μSOP.
The DS1804 is a single nonvolatile potentiometer. The device has a total of 100 tap-points including the L- and H- terminals. A total of 99 resistive segments exist between the L- and H- terminals. These tap points are accessible to the W-terminal, whose position is controlled via a three-terminal control port.
FEATURES 1. Single 100-Position Taper Potentiometer 2. Nonvolatile (NV) On-Demand Wiper Storage 3. Operates from 3V or 5V Supplies 4. Up/Down, Increment-Controlled Interface 5. Available in 8-Pin (300 mils) DIP, 8-Pin (150 mils) SO, and 8-Pin (118 mils) µSOP 6. -40°C to +85°C Operating Temperature Range