DS1845E-100+

Digital Potentiometers Overview

The DS1845E-100+ is a dual non-volatile digital potentiometer IC featuring one 10kΩ, 100-position linear taper potentiometer and one 100kΩ, 256-position linear taper potentiometer. It integrates 256 bytes of EEPROM memory for storing configuration data or wiper settings. The device communicates via an I²C compatible 2-wire serial interface (SDA/SCL) and supports hardware write protection through the WP pin. Operating from a supply voltage range of +2.7V to +5.5V, it is housed in a 14-pin TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Dual linear taper potentiometers: Pot 0 (10kΩ, 100 positions) and Pot 1 (100kΩ, 256 positions)
• 256-byte EEPROM memory with nonvolatile wiper storage at addresses F8h and F9h
• I²C compatible 2-wire serial interface with up to eight devices addressable on one bus
• Hardware write protection via external WP pin to secure memory and wiper settings

Digital Potentiometers Applications

• Bias voltage and current setting in control applications
• System calibration data storage
• Configuration memory for specific devices

Digital Potentiometers Procurement Notes

Verify component authenticity and lead-free status indicated by the '+' suffix. Confirm the 14-pin TSSOP packaging matches design requirements. Ensure the operating environment stays within the specified -40°C to +85°C industrial temperature range. Check that the supply voltage remains between 2.7V and 5.5V for proper functionality.

Digital Potentiometers Selection Notes

Select this model when a combination of a low-resistance 100-step pot and a high-resistance 256-step pot is required. The 100kΩ resistance of Potentiometer 1 distinguishes it from lower resistance variants like the DS1845E-010+. Ensure the application utilizes an I²C master controller capable of generating start/stop conditions and handling acknowledge polling for EEPROM writes.

Digital Potentiometers Part Context

This component belongs to the DS1845 family of dual non-volatile digital potentiometers. The 'E' designation typically indicates the 14-pin TSSOP package variant, while the '-100' suffix specifies the 10kΩ/100kΩ resistance combination. The '+' suffix denotes lead-free construction compliant with RoHS standards.

Digital Potentiometers Replacement Considerations

Direct replacements include other DS1845E-100 variants such as tape-and-reel versions (DS1845E-100+T&R). For different resistance values, consider DS1845E-010+ (10k/10k) or DS1845E-050+ (10k/50k), provided the pinout and interface remain compatible.