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Description:Dual 256-Position I2C Compatible Digital Potentiometer
Manufacturer:Analog Devices
Datasheet:PDF (0.98M).
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The AD5243 and AD5248 provide a compact 3 mm x 4.9 mm packaged solution for dual 256-position adjustment applications. These devices perform the same electronic adjustment function as a 3-terminal mechanical potentiometer (AD5243) or a 2-terminal variable resistor (AD5248). Available in four different end-to-end resistance values (2.5 k, 10 k, 50 k, and 100 k), these low temperature coefficient devices are ideal for high accuracy and stability variable resistance adjustments. The wiper settings are controllable through the I2C compatible digital interface. The AD5248 has extra package address decode pins AD0 and AD1, allowing multiple parts to share the same I2C 2-wire bus on a PCB. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the RDAC latch.1

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