DS1845B-100

Digital Potentiometers Overview

The DS1845B-100 is a dual non-volatile digital potentiometer IC manufactured by Analog Devices/Maxim Integrated. It integrates one 10kΩ, 100-position linear taper potentiometer and one 100kΩ, 256-position linear taper potentiometer, alongside 256 bytes of EEPROM memory. The device operates on a 2-wire I2C compatible serial interface with hardware write protection via the WP pin. It supports supply voltages from 2.7V to 5.5V and functions within an industrial temperature range of -40°C to +85°C. The component is housed in a 16-ball CSBGA package measuring 4mm x 4mm.

Digital Potentiometers Feature Summary

• Dual linear taper potentiometers: Pot 0 (10kΩ, 100 positions) and Pot 1 (100kΩ, 256 positions)
• Integrated 256-byte EEPROM for wiper storage and user data
• I2C compatible 2-wire serial interface with up to eight devices per bus
• Hardware write protection via external WP pin

Digital Potentiometers Applications

• Bias voltage and current setting in control applications
• System configuration and calibration data storage
• Multi-dropped sensor or actuator networks requiring adjustable parameters

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and lead-free status. The base model DS1845B-100 denotes the 16-ball CSBGA package without lead-free designation. Suffixes such as '+T&R' indicate tape and reel packaging and lead-free compliance. Confirm availability status as distribution channels may list varying stock levels or end-of-life notices.

Digital Potentiometers Selection Notes

Select this component when a dual-channel digital potentiometer solution with non-volatile memory retention is required. Ensure the system design accommodates the 16-ball CSBGA footprint. Verify that the application voltage remains within the 2.7V to 5.5V range and that the I2C bus timing requirements are met for standard or fast mode operation.

Digital Potentiometers Part Context

This part belongs to the DS1845 family of dual non-volatile potentiometers. Variants differ primarily in resistance values (e.g., DS1845E-010, DS1845E-050) and package types (TSSOP, Flip Chip, CSBGA). The 'B' suffix specifically identifies the 16-ball CSBGA package option within this series.

Digital Potentiometers Replacement Considerations

Direct replacements include other members of the DS1845 family such as DS1845E-100 (TSSOP) or DS1845X-100 (Flip Chip), provided the PCB footprint can be adapted. Cross-package substitution requires careful review of pinout compatibility and thermal management specifications.