1024-Position, 1% Resistor Tolerance Error, SPI Interface and 50-TP Memory Digital Rheostat
The AD5270/AD5271 are single-channel, 1024-/ 256-position digital rheostats that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package.
The AD5270/AD5271 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 AD5270/AD5271 device wiper settings are controllable through the SPI digital interface. Unlimited adjustments are allowed before programming the resistance value into the 50-TP memory. The AD5270/AD5271 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 resistance position (analogous to placing epoxy on a mechanical trimmer).
The AD5270/AD5271 are available in a 3 mm x 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 potentiometer 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 AD5270 is a single-channel, 1024-position digital rheostat with less than ±1% end-to-end resistor tolerance error and 50-time programmable memory.
The AD5270 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 AD5270 uses a versatile 3-wire serial interface that operates at clock rates up to 50 MHz, and it is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards.
The EVAL-AD5270SDZ evaluation board can operate in single-supply and dual-supply mode and incorporates an internal power supply from the USB.
Complete specifications for the AD5270 can be found in the UG-094 datasheet.
Product Selection Guide
Choosing the Correct digiPOT for Your Application
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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.