ADR520:  High Precision Shunt Mode Voltage Reference (2.048 V)

Designed for space-critical applications, the ADR520/ADR525/ ADR530/ADR540/ADR550 are high precision shunt voltage references, housed in ultrasmall SC70 and SOT-23-3 packages. These references feature ...More

ADR520:  High Precision Shunt Mode Voltage Reference (2.048 V)

Product Description

Designed for space-critical applications, the ADR520/ADR525/ ADR530/ADR540/ADR550 are high precision shunt voltage references, housed in ultrasmall SC70 and SOT-23-3 packages. These references feature low temperature drift of 40 ppm/°C, an initial accuracy of better than ±0.2%, and ultralow output noise of 14 μV p-p.

Available in output voltages of 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V, the advanced design of the ADR520/ADR525/ ADR530/ADR540/ADR550 eliminates the need for compensa-tion by an external capacitor, yet the references are stable with any capacitive load. The minimum operating current increases from a mere 50 μA to a maximum of 15 mA. This low operating current and ease of use make these references ideally suited for handheld, battery-powered applications.

A trim terminal is available on the ADR520/ADR525/ADR530/ ADR540/ADR550 to allow adjustment of the output voltage over a ±0.5% range, without affecting the temperature coefficient of the device. This feature provides users with the flexibility to trim out any system errors.

Applications

  • Portable, battery-powered equipment
  • Automotive
  • Power supplies
  • Data acquisition systems
  • Instrumentation and process control
  • Energy measurement

    • Data Sheet, Rev. E, 6/08

    Features

    • Ultracompact SC70 and SOT-23-3 packages
    • Temperature coefficient: 40 ppm/°C (maximum)
    • 2× the temperature coefficient improvement over the LM4040
    • Pin compatible with LM4040/LM4050
    • Initial accuracy: ±0.2%
    • Low output voltage noise: 14 μV p-p @
      2.5 V output
    • No external capacitor required
    • Operating current range: 50 μA to 15 mA
    • Industrial temperature range: −40°C to +85°C

    Diagrams

    ADR520 Diagram
    Pin Configuration Diagram for ADR520

    Specifications

    Vout 2.048
    Initial Accuracy (%) 0.2
    Ref Out TC (ppm/C) 40ppm/C
    Supply Voltage Range (V) n/a, shunt reference
    Supply Current (max) 50µA
    Ref Output Current (mA) n/a
    0.1-10 Hz Noise (µV p-p) 14µV p-p
    Temp Range(s) -40 to +85
    Package SC70,SOT23
    Reference Type Shunt

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