DS1841N+T&R

Digital Potentiometers Overview

The DS1841N+T&R is a temperature-controlled, nonvolatile digital resistor featuring an integrated I2C interface and on-chip temperature sensor. It provides a logarithmic resistance range from 3.7kΩ to 22kΩ with a fixed 3.6kΩ series resistor. The device utilizes a 72-byte lookup table indexed by its internal ADC to drive the wiper position across a -40°C to +100°C operating range. Key electrical parameters include a 2.7V to 5.5V supply voltage, 350µA typical supply current, and 128 wiper tap points. It supports Fast-Mode I2C communication up to 400kHz and offers EEPROM endurance of 50,000 to 200,000 write cycles depending on temperature.

Digital Potentiometers Feature Summary

• Temperature-compensated logarithmic resistor with 128 wiper tap points
• Integrated 8-bit temperature sensor and ADC for closed-loop compensation
• 72-byte nonvolatile lookup table (LUT) covering -40°C to +100°C
• I2C-compatible serial interface supporting up to 400kHz clock frequency

Digital Potentiometers Applications

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

Digital Potentiometers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via official documentation. Check for lead-free packaging designation indicated by the '+' suffix. Ensure storage conditions remain within -55°C to +125°C to preserve nonvolatile memory integrity prior to installation.

Digital Potentiometers Selection Notes

Select this component when temperature-dependent resistance adjustment is required without mechanical components. The LUT Adder Mode allows offsetting nominal values using the Initial Value Register. Address pins A0 and A1 enable multiple devices on a single I2C bus. Ensure the application voltage stays within the 2.7V to 5.5V range and that the exposed paddle is grounded for proper thermal and electrical performance.

Digital Potentiometers Part Context

The DS1841N+T&R belongs to the DS1841 family of digital potentiometers manufactured by Analog Devices Inc./Maxim Integrated. The 'N+' suffix denotes a lead-free TDFN package, while 'T&R' indicates tape and reel packaging. This specific variant operates over the extended industrial temperature range of -40°C to +100°C and is housed in a 10-pin TDFN-EP package measuring 3mm x 3mm.

Digital Potentiometers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify pin compatibility and electrical specifications against alternative digital resistors if cross-referencing is required.