AD5254BRUZ10 Datasheet

Analog Devices AD5254BRUZ10


The AD5254BRUZ10 is quad-channel, I2 C®, 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 storing user-defined information, such as memory data for other components, look-up table, or system identification information. AD5254BRUZ10 Features • AD5253: quad 64-position resolution• AD5254: quad 256-position resolution• 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ• Nonvolatile memory1 stores wiper settings w/write protection• Power-on refreshed to EEMEM settings in 300 µs typ• EEMEM rewrite time = 540 µs typ• Resistance tolerance stored in nonvolatile memory• 12 extra bytes in EEMEM for user-defined information• I2C-compatible serial interface• Direct read/write access of RDAC2 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—1 kΩversion• Single supply 2.7 V to 5.5 V• Dual supply ±2.25 V to ±2.75 V• 2 slave address-decodingbits allow operation of 4 devices• 100-year typical data retention, TA= 55°C• Operating temperature: –40°C to +105°C AD5254BRUZ10 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


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