AD5235BRU25-EP-RL7
数据手册.pdf非易失性内存，双通道1024位数字电位计 Nonvolatile Memory, Dual 1024-Position Digital Potentiometer
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.
