DS1841N+

Digital Potentiometers Overview

The DS1841N+ is a 7-bit logarithmic digital resistor featuring an integrated temperature sensor and nonvolatile memory. It provides a 22kΩ to 3.7kΩ adjustable logarithmic resistance with a 3.6kΩ fixed series resistor, offering 128 wiper tap points. The device operates on a 2.7V to 5.5V supply with a typical current of 350µA. It includes a 72-byte lookup table indexed by an internal ADC for temperature compensation across -40°C to +100°C. Communication is handled via an I²C interface supporting up to 400kHz.

Digital Potentiometers Feature Summary

• Temperature-controlled logarithmic resistor with 128 wiper taps
• Integrated 8-bit temperature sensor and supply voltage monitor
• 72-byte nonvolatile lookup table for arbitrary slope compensation
• I²C-compatible serial interface with address pins for multi-device buses

Digital Potentiometers Applications

• Optical transceivers
• Linear and nonlinear compensation circuits
• Instrumentation and industrial controls
• Mechanical potentiometer replacement

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix when sourcing. The 'N+' designation indicates a lead-free package compliant with RoHS standards. The 'T&R' suffix denotes tape and reel packaging, while the absence of this suffix typically implies tube packaging. Confirm availability status as supply may be limited or subject to factory special orders depending on the distributor.

Digital Potentiometers Selection Notes

Select based on required resistance range and temperature compensation profile. The device supports LUT Mode and LUT Adder Mode for flexible control logic. Address pins A0 and A1 allow up to four devices on a single I²C bus. Ensure the operating environment stays within the -40°C to +100°C range and that the supply voltage remains between 2.7V and 5.5V.

Digital Potentiometers Part Context

The DS1841N+ belongs to the DS1841 family of temperature-controlled digital resistors manufactured by Analog Devices / Maxim Integrated. It is housed in a 10-pin TDFN-EP package measuring 3mm x 3mm. The exposed paddle must be connected to ground for proper operation and thermal management.

Digital Potentiometers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.