DS1841
Description
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-patible 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
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) enpassing a temperature range from -40°C to +100°C. The LUT output can drive the resistor directly or be added to an NV initial-value register (IVR) to drive the resistor. This flexible LUT-based architecture allows the DS1841 to provide a temperature-pensated resistor output with arbitrary slope. Programming is acplished by an I2C-patible interface, which can...
