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Digital Potentiometer 1kOhm 256POS Volatile Linear 8-Pin SOIC N Tube


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  • Part Number : AD8400ARZ1

  • Package/Case : SOIC-8

  • Brands : Analog Devices

  • Components Categories : Digital Potentiometers

  • Datesheet : AD8400ARZ1 DataSheet (PDF)

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Overview of AD8400ARZ1

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 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 kOhm, 10 kOhm, 50 kOhm or 100 kOhm 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-before-make operation.

Key Features

  • 256-Position
  • Replaces 1,2 or 4 Potentiometers
  • 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
  • Power Shutdown - Less than 5 µA
  • 3-Wire SPI-Compatible Serial


  • Mechanical potentiometer replacement
  • Programmable filters, delays, time constants
  • Volume control, panning
  • Line impedance matching
  • Power supply adjustment


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category Digital Potentiometer ICs RoHS Details
Series AD8400 Resistance 1 kOhms
Temperature Coefficient 500 PPM / C Tolerance 20 %
Number of POTs Single Taps per POT 256
Wiper Memory Volatile Digital Interface SPI
Operating Supply Voltage 5.5 V Operating Supply Current 10 nA
Minimum Operating Temperature - 40 C Maximum Operating Temperature + 125 C
Mounting Style PCB Mount Termination Style SMD/SMT
Package / Case SOIC-8 Taper Linear
Brand Analog Devices Height 1.5 mm
Length 5 mm Product Type Digital Potentiometer ICs
Factory Pack Quantity 98 Subcategory Digital Potentiometer ICs
Supply Type Single Supply Voltage - Max 5.5 V
Supply Voltage - Min 2.7 V Width 4 mm
Unit Weight 0.019048 oz

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