Features and Benefits
- Two linear taper potentiometers
- DS1845-010 one 10k, 100 position & one 10k, 256 position
- DS1845-050 one 10k, 100 position & one 50k, 256 postition
- DS1845-100 one 10k, 100 position & one 100k, 256 position
- 256 bytes of EEPROM memory
- Access to data and potentiometer control via an I2C compatible 2-wire interface
- External Write Enable pin to protect data and potentiometer settings
- Nonvolatile wiper storage
- Operates from 3V or 5V supplies
- Packaging: Flip Chip Package, 16-ball CSBGA, 14-pin TSSOP
- Industrial operating temperature: -40°C to +85°C
The DS1845 Dual NV Potentiometer and Memory consists of one 100-position linear taper potentiometer, one 256-position linear taper potentiometer, 256 bytes of EEPROM memory, and a 2-wire interface. The device provides an ideal method for setting bias voltages and currents in control applications using a minimum of circuitry. The EEPROM memory allows a user to store configuration or calibration data for a specific system or device as well as provide control of the potentiometer wiper settings. Any type of user information may reside in the first 248 bytes of this memory. The next two addresses of EEPROM memory are for potentiometer settings. Access to this EEPROM is via an industry standard 2-wire bus. The wiper position of the DS1845, as well as EEPROM data, can be hardware write-protected using the Write Protect (WP) input pin. Up to eight DS1845s can be installed on a single 2-wire bus. Access to an individual device is achieved by using a device address that is determined by the logic levels of address pins A0 though A2. Additionally, the DS1845 will operate from 3 volt or 5 volt supplies. Three package options are available: Flip Chip Package, 16-ball CSBGA and 14-pin TSSOP.
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Documentation & Resources
DS1845 Reliability Data1/12/2023
Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications4/18/2007
How to Use a PC's Parallel Port to Communicate with 2-Wire Devices6/15/2004
Behind the Light Show in Optical Transceivers10/21/2002
2-Wire Communication Using LabVIEW9/9/2002
Using a PC's RS-232 Serial Port To Communicate with 2-Wire Devices6/7/2002
DS1845/DS1855 Temperature Coefficient Analysis6/7/2002
Interfacing digitally controlled potentiometers and resistors to laser drivers5/10/2002
Methods of Controlling Laser Drivers: POTs and DACs3/26/2002
DS1845 Companion Parts
Recommended Related Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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