General Description

The DS1841 is a 7-bit, logarithmic, nonvolatile (NV) digital resistor that features an on-chip temperature sensor and associated analog-to-digital converter (ADC). The integrated temperature sensor indexes a 72-byte NV lookup table (LUT) encompassing a temperature range from -40°C to +100°C.

Features

♦ 22kΩ to 3.7kΩ Adjustable Logarithmic Resistor with a 3.6kΩ Fixed Resistor

♦ 128 Wiper Tap Points

♦ On-Chip Temperature Sensor and ADC

♦ 72-Byte Lookup Table (LUT)

♦ I2C-Compatible Serial Interface

♦ Address Pins Allow Up to Four DS1841s to Share the Same I2C Bus

♦ Digital Supply of 2.7V to 5.5V

♦ -40°C to +100°C Operating Range

♦ 3mm x 3mm, 10-Pin TDFN Package

Applications

    Optical Transceivers

    Linear and Nonlinear Compensation

    Instrumentation and Industrial Controls

    Mechanical Potentiometer Replacement