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1024/256位1%电阻误差SPI接口和50-tp记忆数字电位器ad5270/ad5271数据表
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The AD5270/AD52711 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 × 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.
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