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
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.
*The terms nonvolatile memory and EEMEM are used interchangeably.
**The terms digital potentiometer and RDAC are used interchangeably.
Data Sheet, Rev. C, 1/07
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Application Notes (6)
Software & Systems Requirements
3rd Party Solutions (1)
Product Selection Guide (1)
Analog Dialogue (1)
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.