Analog Devices Inc. AD5254BRU10

Description
The AD5253/AD5254 are quad-channel, I²C, nonvolatile memory, digitally controlled potentiometers with 64/256 positions, respectively. They perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors.

Features
Nonvolatile memory stores wiper settings with write protection
Power-on refreshed to EEMEM settings in 300 µs typ
EEMEM rewrite time = 540 µs typ
12 extra bytes in EEMEM for user-defined information
PC-compatible serial interface
Direct read/write access of RDAC and EEMEM registers
Predefined linear increment/decrement commands
Predefined ±6 dB step change commands
Synchronous or asynchronous quad-channel update
Wiper setting readback
4 MHz bandwidth - 1k version
Single supply 2.7 V to 5.5 V
Dual supply ±2.25 V to ±2.75 V
2 slave address-decoding bits allow operation of 4 devices
100-year typical data retention, TA = 55°C
Operating temperature: -40°C to 85°C

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