AD5231 Nonvolatile Memory, 1024-Position Digital Potentiometer

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

The AD5231 is a 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 remote controllability. The AD5231 has versatile programming that uses a standard 3-wire serial interface for 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.

In scratchpad programming mode, a specific setting can be programmed directly to the RDAC register that sets the resistance between Terminals W–A and Terminals W–B. This setting can be stored into the EEMEM and is transferred automatically to the RDAC register during system power-on.

The EEMEM content can be restored dynamically or through external PR strobing, and a WP function protects EEMEM contents. To simplify the programming, the linear-step increment or decrement commands can be used to move the RDAC wiper up or down, one step at a time. The ±6 dB step commands can be used to double or half the RDAC wiper setting.

The AD5231 is available in a 16-lead TSSOP. The part is guaranteed to operate over the extended industrial temperature range of −40°C to +85°C.

Applications

*The terms nonvolatile memory and EEMEM are used interchangeably. **The terms digital potentiometer and RDAC are used interchangeably.

Data Sheet, Rev. C, 1/07

Features and Benefits
  • 1024-position resolution
  • Nonvolatile memory maintains wiper setting
  • Power-on refresh with EEMEM setting
  • EEMEM restore time: 140 μs typ
  • Full monotonic operation
  • 10 kΩ, 50 kΩ, and 100 kΩ terminal resistance
  • Permanent memory write protection
  • Wiper setting readback
  • Predefined linear increment/decrement instructions
  • Predefined ±6 dB/step log taper increment/decrement instructions
  • SPI®-compatible serial interface
  • 3 V to 5 V single-supply or
    ±2.5 V dual-supply operation 
Digital to Analog Converters
Data Sheets
Documentnote
AD5231: Nonvolatile Memory, 1024-Position Digital Potentiometer Data Sheet (Rev. D)PDF 750 kB
Application Notes
Documentnote
AN-1291: Digital Potentiometers: Frequently Asked Questions (Rev. A)PDF 805 kB
AN-686: Implementing an I2C® Reset (Rev. 0)PDF 44 kB
AN-579: Versatile Programmable Amplifiers Using Digital Potentiometers with Nonvolatile Memory (Rev. 0)PDF 90 kB
AN-349: Keys to Longer Life for CMOSPDF 89 kB
AN-582: Resolution Enhancements of Digital Potentiometers with Multiple DevicesPDF 135 kB
AN-580: Programmable Oscillator Uses Digital Potentiometers (Rev. 0)PDF 52 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD5231BRU10 Production16 ld TSSOPOTH 96-40 to 85C2.532.29N
AD5231BRU100 Production16 ld TSSOPOTH 96-40 to 85C00N
AD5231BRU100-REEL7 Contact ADI16 ld TSSOPREEL 1000-40 to 85C00N
AD5231BRUZ10 Production16 ld TSSOPOTH 96-40 to 85C2.191.97Y
AD5231BRUZ10-REEL7 Production16 ld TSSOPREEL 1000-40 to 85C01.97Y
AD5231BRUZ100 Production16 ld TSSOPOTH 96-40 to 85C2.191.97Y
AD5231BRUZ100-RL7 Production16 ld TSSOPREEL 1000-40 to 85C01.97Y
AD5231BRUZ50 Production16 ld TSSOPOTH 96-40 to 85C2.191.97Y
AD5231BRUZ50-REEL7 Production16 ld TSSOPREEL 1000-40 to 85C01.97Y
Reference Materials
AD5231: Nonvolatile Memory, 1024-Position Digital Potentiometer Data Sheet (Rev. D) ad5231
AN-579: 采用基于非易失性存储器的数字电位器的多功能可编程放大器 (Rev. 0) ad5231
AN-1291：数字电位计：常见问题解答 (Rev. A) ad8402
AN-1291: Digital Potentiometers: Frequently Asked Questions (Rev. A) ad8402
AN-686: 实现I²C®复位 (Rev. 0) adg729
AN-349: 延长CMOS寿命的关键因素 adg3233
AN-686: Implementing an I2C® Reset (Rev. 0) ad7993
AN-579: Versatile Programmable Amplifiers Using Digital Potentiometers with Nonvolatile Memory (Rev. 0) ad5231
AN-349: Keys to Longer Life for CMOS ad7703
AN-582: 采用多个器件增强数字电位计分辨率 (Rev. A) ad8402
AN-582: Resolution Enhancements of Digital Potentiometers with Multiple Devices ad8402
AN-580: Programmable Oscillator Uses Digital Potentiometers (Rev. 0) ad8402
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