1024-Position, 1% Resistor Tolerance Error, Single Channel I2C Interface and 50-TP Memory Digital Rheostat
The AD5272/AD5274 are single-channel, 1024-/256-position digital rheostats that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package.
The AD5272/AD5274 ensure less than 1% end-to-end resistor tolerance error and offer 50-times programmable (50-TP) memory.
The guaranteed industry leading low resistor tolerance error feature simplifies open-loop applications as well as precision calibration and tolerance matching applications.
The AD5272/AD5274 device wiper settings are controllable through the I2C-compatible digital interface. Unlimited adjustments are allowed before programming the resistance value into the 50-TP memory. The AD5272/AD5274 do not require any external voltage supply to facilitate fuse blow and there are 50 opportunities for permanent programming. During 50-TP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).
The AD5272/AD5274 are available in a 3 mm × 3 mm 10-lead LFCSP package and in a 10-lead MSOP package. The parts are guaranteed to operate over the extended industrial temperature range of −40°C to +125°C.
- Mechanical rheostat replacements
- Op-amp: variable gain control
- Instrumentation: gain, offset adjustment
- Programmable voltage to current conversions
- Programmable filters, delays, time constants
- Programmable power supply
- Sensor calibration
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.
The AD5272 is a single-channel, 1024-position digital rheostat with less than ±1% end-to-end resistor tolerance error and 50-time programmable memory.
The AD5272 supports a dual-supply ±2.5 V to ±2.75 V operation and a single-supply 2.7 V to 5.5 V operation, making it suited for battery-powered applications and many other applications.
The AD5272 uses a versatile I2C serial interface that operates in fast mode, allowing speed until 400 kbps. The device allows the selection of up to three different I2C addresses.
The EVAL-AD5272SDZ evaluation board can operate in single-supply and dual-supply mode and incorporates an internal power supply from the USB.
Complete specifications for the AD5272 can be found in the AD5272 / AD5274 data sheet.
Product Selection Guide
Choosing the Correct digiPOT for Your Application
Rarely Asked Questions
I'm trying to use a potentiometer (pot) in the feedback loop of an op amp...
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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.