1024 / 256位， 1 ％电阻容差误差， SPI接口和50 -TP存储器数字电位器 1024-/256-Position, 1% Resistor Tolerance Error, SPI Interface and 50-TP Memory Digital Rheostat
Product Details
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.
**Applications**
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- Mechanical potentiometer replacements
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- Op-amp: variable gain control
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- Instrumentation: gain, offset adjustment
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- Programmable voltage-to-current conversions
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- Programmable filters, delays, time constants
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- Programmable power supply
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- Sensor calibration
### Features and Benefits
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- Single-channel, 1024-/256-position resolution
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- 20 kΩ, 50 kΩ and 100 kΩ nominal resistance
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- Maximum ±1% nominal resistor tolerance error
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- 50-times programmable 50-TP wiper memory
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- Rheostat mode temperature coefficient: 5 ppm/°C
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- 2.7 V to 5.5 V single-supply operation
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- ±2.5 V to ±2.75 V dual-supply operation for ac or bipolar operations
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- SPI-compatible interface
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- Wiper setting readback
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- Power on refreshed from 50-TP memory
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- Thin LFCSP, 10-lead, 3 mm × 3 mm × 0.8 mm package
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- Compact MSOP, 10-lead, 3 mm × 4.9 mm × 1.1 mm package
