Quad 64-/256-Position I2C Nonvolatile
Memory Digital Potentiometers
AD5253/AD5254 Data Sheet
FEATURES FUNCTIONAL BLOCK DIAGRAM APPLICATIONS
Mechanical potentiometer replacement
Low resolution DAC replacement
RGB LED backlight control
White LED brightness adjustment
RF base station power amp bias control
Programmable gain and offset control
Programmable attenuators
Programmable voltage-to-current conversion
Programmable power supply
Programmable filters
Sensor calibrations GENERAL DESCRIPTION The AD5253/AD5254 are quad-channel, I2C®, nonvolatile
mem-ory, digitally controlled potentiometers with 64/256
positions, respectively. These devices perform the same
electronic adjust-ment functions as mechanical potentiometers,
trimmers, and variable resistors.
The parts’ versatile programmability allows multiple modes of
operation, including read/write access in the RDAC and EEMEM
registers, increment/decrement of resistance, resistance changes
in ±6 dB scales, wiper setting readback, and extra EEMEM for …