●GENERAL DESCRIPTION
●The AD5235 is a dual-channel, nonvolatile memory, 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/decrement, ±6 dB/step log taper adjustment, wiper setting readback, and extra EEMEM for user defined information such as memory data for other components,
●look-up table, or system identification information.
●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
