AD5235 Datasheet PDF

●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