Alternative Parts
Overview
Features and Benefits
- Dual-channel, 256-position resolution
- 10 kΩ, 50 kΩ, and 100 kΩ nominal terminal resistance
- Nonvolatile memory maintenance of wiper settings
- Predefined linear increment/decrement instructions
- Predefined ±6 dB step log taper increment/decrement instructions
- SPI-compatible serial interface
- Wiper settings and EEMEM readback
- 3 V to 5 V single-supply operation
- ±2.5 V dual-supply operation
- 14 bytes of general-purpose user EEMEM
- Permanent memory write protection
- 100-year typical data retention (TA = 55°C)
Product Details
The AD5232 device provides a nonvolatile, dual-channel, digitally controlled variable resistor (VR) with 256-position resolution. This 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 AD5232, performed via a microcontroller, allows multiple modes of operation and adjustment.
In the direct program mode, a predetermined setting of the RDAC registers (RDAC1 and RDAC2) can be loaded directly from the microcontroller. Another important mode of operation allows the RDACx register to be refreshed with the setting previously stored in the corresponding EEMEM register (EEMEM1 and EEMEM2). When changes are made to the RDACx register to establish a new wiper position, the value of the setting can be saved into the EEMEMx register by executing an EEMEM save operation. After the settings are saved in the EEMEMx register, these values are automatically transferred to the RDACx register to set the wiper position at system power-on. Such operation is enabled by the internal preset strobe. The preset strobe can also be accessed externally.
All internal register contents can be read via the serial data output (SDO). This includes the RDAC1 and RDAC2 registers, the corresponding nonvolatile EEMEM1 and EEMEM2 registers, and the 14 spare USER EEMEM registers that are available for constant storage.
The basic mode of adjustment is the increment and decrement command instructions that control the wiper position setting register (RDACx). An internal scratch pad RDACx register can be moved up or down one step of the nominal resistance between Terminal A and Terminal B. This step adjustment linearly changes the wiper to Terminal B resistance (RWB) by one position segment of the device’s end-to-end resistance (RAB). For exponential/ logarithmic changes in wiper setting, a left/right shift command instruction adjusts the levels in ±6 dB steps, which can be useful for audio and light alarm applications.
The AD5232 is available in a thin, 16-lead TSSOP package. All parts are guaranteed to operate over the extended industrial temperature range of −40°C to +85°C. An evaluation board, the EVAL-AD5232-10EBZ, is available.
APPLICATIONS
- Mechanical potentiometer replacement
- Instrumentation: gain and offset adjustment
- Programmable voltage-to-current conversion
- Programmable filters, delays, and time constants
- Programmable power supply
- Low resolution DAC replacement
- Sensor calibration
Product Categories
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.
Evaluation Kits (1)
Documentation & Resources
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AN-1291: Digital Potentiometers: Frequently Asked Questions8/18/2020
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AN-686: Implementing an I2C® Reset (Rev. 0)12/16/2003PDF44 kB
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AN-579: Versatile Programmable Amplifiers Using Digital Potentiometers with Nonvolatile Memory (Rev. 0)8/18/2003PDF90 kB
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AN-582: Resolution Enhancements of Digital Potentiometers with Multiple Devices10/2/2002PDF135 kB
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AN-580: Programmable Oscillator Uses Digital Potentiometers (Rev. 0)10/2/2002PDF52 kB
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AN-585: AD5232–Programmable Oscillator Using Digital Potentiometers (Rev. 0)1/1/2000PDF102 kB
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UG-626: Evaluation Board for the AD5232DBZ Digital Potentiometer6/2/2014PDF763 kB
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UG-347: Evaluation Board for the AD5232 Digital Potentiometer12/15/2011PDF679 kB
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FAQs7/26/2017
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Choosing the Correct digiPOT for Your Application6/7/2013PDF311 K
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Versatile Programmable Amplifiers Use Digital Potentiometers with Nonvolatile Memory6/1/2001 Analog Dialogue
Software & Systems Requirements
Device Drivers
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Support & Discussions
AD5232 Discussions
Sample & Buy
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.