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AD5121:  Single Channel, 128-Position, I2C / SPI, Nonvolatile Digital Potentiometer

Product Details

Product Status:Recommended for New Designs

The AD5121/AD5141 potentiometers provide a nonvolatile solution for 128-/256-position adjustment applications, offering guaranteed low resistor tolerance errors of ±8% and up to ±6 mA current density in the A, B, and W pins.

The low resistor tolerance and low nominal temperature coefficient simplify open-loop applications as well as applications requiring tolerance matching.

The linear gain setting mode allows independent programming of the resistance between the digital potentiometer terminals, RAW and RWB, allowing very accurate resistor matching.

The high bandwidth and low total harmonic distortion (THD) ensure an optimal performance for ac signals, making it suitable for filter design.

The low wiper resistance at the ends of the resistor array of only 40 Ω, allowing pin-to-pin connection.

The wiper values can be set through an SPI-/I2C-compatible digital interface that is also used to readback the wiper register and EEMEM content.

The AD5121/AD5141 is available in a compact 16-lead, 3 mm × 3 mm LFCSP. The parts are guaranteed to operate over the extended industrial temperature range of −40°C to +125°C.


  • Portable electronics level adjustment
  • LCD panel brightness and contrast controls
  • Programmable filters, delays, time constants
  • Programmable power supplies


  • 10 kΩ and 100 kΩ resistance options
  • Resistor tolerance: ±8% maximum
  • Wiper current: ±6 mA
  • Low temperature coefficient:
    35 ppm/°C
  • Wide bandwidth: 3 MHz
  • Fast start-up time < 100 µs
  • Linear gain setting mode
  • Single- and dual-supply operation
  • Independent logic supply
    (1.8 V to 5.5 V)
  • Wide operating temperature
    −40°C to +125°C
  • 3 mm × 3 mm LFCSP package
  • 4 kV ESD protection

Functional Block Diagram for AD5121

AD512x / 4x Series of Digital Non-Volatile digiPOTs


Title Content Type File Type
AD5121/AD5141: Single Channel, 128-/256-Position, I2C/SPI, Nonvolatile Digital Potentiometer Data Sheet (Rev A, 12/2012) (pdf, 666 kB) Data Sheets PDF
AN-1291: Digital Potentiometers: Frequently Asked Questions  (pdf, 805 kB) Application Notes PDF
AN-1169: Linear Gain Setting Mode: A Detailed Description  (pdf, 214 kB) Application Notes PDF
Webinar: Digital Potentiometers - Where and How to Use
Digital Potentiometers (digiPOTs) provide a convenient way to adjust the ac or dc voltage or current output of sensors, power supplies, or other devices that require some type of calibration. This webcast will describe the function, use and advantages of using digital potentiometers in various applications. The webinar will also highlight the main parameters to be considered when designing a circuit using a digital potentiometer.
Webcasts WEBCAST
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD5121/AD5141 IBIS Model  (ibs) IBIS Models IBS

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

Price Table Help

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.

AD5141 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-AD5141DBZ Status: Production Evaluation Board $59.00 Yes -
EVAL-SDP-CS1Z Status: Contact ADI Evaluation Controller Board $49.00 Yes -

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.

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