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Partname:AD8402AN1
Description:1-/2-/4-Channel Digital Potentiometers
Manufacturer:Analog Devices
Datasheet:PDF (496K).
Click here to download *)

The AD8400/AD8402/AD8403 provide a single, dual or quad channel, 256 position digitally controlled variable resistor (VR) device. These devices perform the same electronic adjustment function as a potentiometer or variable resistor. The AD8400 contains a single variable resistor in the compact SO-8 package. The AD8402 contains two independent variable resistors in space saving SO-14 surface mount package. The AD8403 contains four independent variable resistors in 24-lead PDIP, SOIC and TSSOP packages. Each part contains a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a digital code loaded into the controlling serial input register. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the VR latch. Each variable resistor offers a completely programmable value of resistance, between the A terminal and the wiper or the B terminal and the wiper. The fixed A to B terminal resistance of 1 k, 10 k, 50 k or 100 k has a 1% channel-to-channel matching tolerance with a nominal temperature coefficient of 500 ppm/C. A unique switching circuit minimizes the high glitch inherent in traditional switched resistor designs avoiding any make-before-break or break-beforemake operation.

Click here to download AD8402AN1 Datasheet
Click here to download AD8402AN1 Datasheet
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