●GENERAL DESCRIPTION
●The AD5235-EP is a dual-channel, nonvolatile memory,digitally controlled potentiometer with 1024-step resolution. 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 AD5235-EP’s versatile programming 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 tables, or system identification information.
●FEATURES
●Dual-channel, 1024-position resolution
●25 kΩ nominal resistance
●Low temperature coefficient: 35 ppm/°C
●Nonvolatile memory stores wiper settings
●Permanent memory write protection
●Wiper setting readback
●Resistance tolerance stored in EEMEM
●Predefined linear increment/decrement instructions
●Predefined ±6 dB/step log taper increment/decrement
●instructions
●SPI-compatible serial interface
●2.7 V to 5 V single supply or ±2.5 V dual supply
●26 bytes extra nonvolatile memory for user-defined
●information
●100-year typical data retention, TA= 55°C
●Power-on refreshed with EEMEM settings
●Enhanced Features
●Supports defense and aerospace applications (AQEC)
●Temperature range: −40°C to +125°C
●Controlled manufacturing baseline
●1 assembly/test site
●1 fabrication site
●Enhanced product change notification
●Qualification data available on request
●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
●ELECTRICAL CHARACTERISTICS
●VDD= 2.7 V to 5.5 V, VSS= 0 V; VDD= 2.5 V, VSS= −2.5 V, VA= VDD, VB= VSS, −40°C < TA< +125°C, unless otherwise noted.
Part 3D Model
