AD5233

Nonvolatile Memory, Quad 64-Position Digital Potentiometer AD5233 FEATURES Nonvolatile memory stores wiper setting 4-channel independent programmable 64-position resolution Power-on refreshed with EEMEM settings EEMEM restore time: 140 μs typical Full monotonic operation 10 kΩ, 50 kΩ, and 100 kΩ terminal resistance Permanent memory write protection Wiper setting readback Predefined linear increment/decrement instructions Predefined ±6 dB/step log taper increment/decrement instructions SPI-compatible serial interface with readback function 2.7 V to 5.5 V single supply or ±2.5 V dual supply 11 bytes extra nonvolatile memory for user-defined data 100-year typical data retention, TA = 55°C APPLICATIONS Mechanical potentiometer replacement Instrumentation: gain, offset adjustment Programmable voltage-to-current conversion Programmable filters, delays, time constants Programmable power supply Sensor calibration GENERAL DESCRIPTION The AD5233 is a quad-channel nonvolatile memory,1 digitally controlled potentiometer2 with a 64-step resolution. The device performs the same electronic adjustment function as a mechanical potentiometer with enhanced resolution, solid-state reliability, and remote controllability. The AD5233 has versatile programming using a serial peripheral interface (SPI) for 16 modes of operation and adjustment, including scratchpad programming, memory storing and restoring, increment/decrement, ±6 dB/step log taper adjustment, wiper setting readback, and extra EEMEM...