Dual 64-/256-Position I2C Nonvolatile
Memory Digital Potentiometers
AD5251/AD5252 Data Sheet
FEATURES FUNCTIONAL BLOCK DIAGRAM APPLICATIONS
Mechanical potentiometer replacement
General-purpose DAC replacement
LCD panel VCOM adjustment
White LED brightness adjustment
RF base station power amp bias control
Programmable gain and offset control
Programmable voltage-to-current conversion
Programmable power supply
Sensor calibrations GENERAL DESCRIPTION
The AD5251/AD5252 are dual-channel, I2C®, nonvolatile memory, digitally controlled potentiometers with 64/256 positions,
respectively. These devices perform the same electronic adjustment 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, EEMEM
POWER-ON
REFRESH VSS
DGND RAB
TOL RDAC1 …