AD5263:  Quad, 15 V, 256-Position Digital Potentiometer with Pin-Selectable SPI/I2C

The AD5263 is the industry’s first quad-channel, 256-position, digital potentiometer* with a selectable digital interface. This device performs the same electronic adjustment function as ...More

AD5263:  Quad, 15 V, 256-Position Digital Potentiometer with Pin-Selectable SPI/I2C

Product Description

The AD5263 is the industry’s first quad-channel, 256-position, digital potentiometer* with a selectable digital interface. This device performs the same electronic adjustment function as mechanical potentiometers or variable resistors, with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance.

Each channel of the AD5263 offers a completely programmable value of resistance between the A terminal and the wiper or between the B terminal and the wiper. The fixed A-to-B terminal resistance of 20 kΩ, 50 kΩ, or 200 kΩ has a nominal temperature coefficient of ±30 ppm/°C and a ±1% channel-to-channel matching tolerance. Another key feature of this part is the ability to operate from +4.5 V to +15 V, or at ±5 V.

Wiper position programming presets to midscale upon power-on. Once powered, the VR wiper position is programmed by either the 3-wire SPI or 2-wire I2C-compatible interface. In the I2C mode, additional programmable logic outputs enable users to drive digital loads, logic gates, and analog switches in their systems.

The AD5263 is available in a narrow body, 24-lead TSSOP. All parts are guaranteed to operate over the automotive temperature range of –40°C to +125°C.

For single- or dual-channel applications, refer to the AD5260/AD5280 or AD5262/AD5282 data sheets.

Applications

  • Mechanical potentiometer replacement
  • Optical network adjustment
  • Instrumentation: gain, offset adjustment
  • Stereo channel audio level control
  • Automotive electronics adjustment
  • Programmable power supply
  • Programmable filters, delays, time constants
  • Line impedance matching
  • Low resolution DAC/trimmer replacement
  • Base station power amp biasing
  • Sensor calibration

    • * The terms digital potentiometer, VR, and RDAC are used interchangeably.

    Features

    • 256-position, 4-channel
    • End-to-end resistance 20 kΩ, 50 kΩ, 200 kΩ
    • Pin-selectable SPI®- or I2C®-compatible interface
    • Power-on preset to midscale
    • Two package address decode pins AD0 and AD1
    • Rheostat mode temperature coefficient 30 ppm/°C
    • Voltage divider temperature coefficient 5 ppm/°C
    • Wide operating temperature range –40°C to +125°C
    • 5 V to 15 V single supply; ±5 V dual supply

    Diagrams

    AD5263 Diagram
    Functional Block Diagram for AD5263

    Specifications

    # Channels 4
    # Positions 256
    Memory Type Volatile
    Interface I2C,SPI
    Resistor Values (kOhms) 20, 50, 200
    Bipolar Voltage Range (V) ±5V
    Voltage Range (V) +15V
    Supply Current (max) 1µA
    Temp. Range -40 °C to.. 125Deg
    Absolute Tempco (ppm/°C) 30ppm/C
    Package TSSOP

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