AD5235

Data Sheet Nonvolatile Memory, Dual 1024-Position Digital Potentiometer AD5235 FEATURES Dual-channel, 1024-position resolution 25 kΩ, 250 kΩ nominal resistance Maximum ±8% nominal resistor tolerance error Low temperature coefficient: 35 ppm/°C 2.7 V to 5 V single supply or ±2.5 V dual supply SPI-compatible serial interface Nonvolatile memory stores wiper settings Power-on refreshed with EEMEM settings Permanent memory write protection Resistance tolerance stored in EEMEM 26 bytes extra nonvolatile memory for user-defined information 1M programming cycles 100-year typical data retention APPLICATIONS DWDM laser diode driver, optical supervisory systems Mechanical potentiometer replacement Instrumentation: gain, offset adjustment Programmable voltage-to-current conversion Programmable filters, delays, time constants Programmable power supply Low resolution DAC replacement Sensor calibration GENERAL DESCRIPTION The AD5235 is a dual-channel, nonvolatile memory,1 digitally controlled potentiometer2 with 1024-step resolution, offering guaranteed maximum low resistor tolerance error of ±8%. The device performs the same electronic adjustment function as a mechanical potentiometer with enhanced resolution, solid state reliability, and superior low temperature coefficient performance. The versatile programming of the AD5235 via an SPI®-compatible serial interface allows 16 modes of operation and adjustment including scratchpad programming, memory storing and restoring, increment/decre...