AD5254BRUZ1-RL7

AD5254 is a quad I²C nonvolatile memory digital controlled potentiometer with 256 positions. This device performs 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 ±6dB scales, wiper setting readback, and extra EEMEM for storing user-defined information, such as memory data for other components, lookup table, or system identification information. Application includes 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.

• Non-volatile memory stores wiper settings with write protection
• 300µs typical EEMEM data restoring time at power-on (VDD rise time dependent)
• Resistance tolerance stored in non-volatile memory
• 12 extra bytes in EEMEM for user-defined information
• I²C-compatible serial interface, direct read/write access of RDAC and EEMEM registers
• Predefined linear increment/decrement commands, predefined ±6dB step change commands
• Synchronous or asynchronous quad-channel update, wiper setting readback
• Single supply power range from 2.7V to 5.5V (VSS = 0V, -40°C <lt/> TA <lt/> +105°C)
• Dual supply power range from ±2.25V to ±2.75V (-40°C <lt/> TA <lt/> +105°C)
• 20 lead TSSOP package, operating temperature range from -40°C to +105°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party