ADR421:  Ultraprecision, Low Noise, 2.500 V XFET® Voltage References

The ADR42x are a series of ultraprecision, second generation eXtra implanted junction FET (XFET) voltage references featuring low noise, high accuracy, and excellent long-term stability in SOIC and ...More

ADR421:  Ultraprecision, Low Noise, 2.500 V XFET® Voltage References

Product Description

The ADR42x are a series of ultraprecision, second generation eXtra implanted junction FET (XFET) voltage references featuring low noise, high accuracy, and excellent long-term stability in SOIC and MSOP footprints.

Patented temperature drift curvature correction technique and XFET technology minimize nonlinearity of the voltage change with temperature. The XFET architecture offers superior accuracy and thermal hysteresis to the band gap references. It also operates at lower power and lower supply headroom than the buried Zener references.

The superb noise and the stable and accurate characteristics of the ADR42x make them ideal for precision conversion applications such as optical networks and medical equipment. The ADR42x trim terminal can also be used to adjust the out-put voltage over a ±0.5% range without compromising any other performance. The ADR42x series voltage references offer two electrical grades and are specified over the extended industrial temperature range of −40°C to +125°C. Devices have 8-lead SOIC or 30% smaller, 8-lead MSOP packages.

Applications

  • Precision data acquisition systems
  • High resolution converters
  • Battery-powered instrumentation
  • Portable medical instruments
  • Industrial process control systems
  • Precision instruments
  • Optical network control circuits

    • Data Sheet, Rev. H, 6/07

    Features

    • Low noise (0.1 Hz to 10 Hz)
      ADR420: 1.75 μV p-p
      ADR421: 1.75 μV p-p
      ADR423: 2.0 μV p-p
      ADR425: 3.4 μV p-p
    • Low temperature coefficient: 3 ppm/°C
    • Long-term stability: 50 ppm/1000 hours
    • Load regulation: 70 ppm/mA
    • Line regulation: 35 ppm/V
    • Low hysteresis: 40 ppm typical
    • Wide operating range
      ADR420: 4 V to 18 V
      ADR421: 4.5 V to 18 V
      ADR423: 5 V to 18 V
      ADR425: 7 V to 18 V
    • Quiescent current: 0.5 mA maximum
    • High output current: 10 mA
    • Wide temperature range: −40°C to +125°C
    Circuits from the Lab

    Find more at our Circuits Library.

    Products Used in This Circuit:
    AD5390, AD5391, AD5392, ADR280, ADR421, ADR431

    Circuit Types:  Multichannel
    Applications:  Instrumentation; Process Control
    Optimized For:  High Performance; High Precision; Temperature Stability

    Products Used in This Circuit:
    AD5380, ADR280, ADR421, ADR431

    Circuit Types:  Multichannel
    Applications:  Instrumentation; Process Control
    Optimized For:  High Performance; Temperature Stability

    Products Used in This Circuit:
    AD5381, ADR280, ADR421, ADR431

    Circuit Types:  Multichannel
    Applications:  Instrumentation; Process Control
    Optimized For:  High Performance; Temperature Stability

    Products Used in This Circuit:
    AD5382, ADR280, ADR421, ADR431

    Circuit Types:  Multichannel
    Applications:  Instrumentation; Process Control
    Optimized For:  High Performance; Temperature Stability

    Products Used in This Circuit:
    AD5383, ADR280, ADR421, ADR431

    Circuit Types:  Multichannel
    Applications:  Instrumentation; Process Control
    Optimized For:  High Performance; Temperature Stability

    Diagrams

    ADR421 Diagram
    Pin Configuration for ADR421

    Specifications

    Vout 2.5
    Initial Accuracy (%) 0.04
    Ref Out TC (ppm/C) 1ppm/C
    Supply Voltage Range (V) +4.5 to +18
    Supply Current 500µA
    Ref Output Current (mA) 10mA
    0.1-10 Hz Noise (µV p-p) 1.75µV p-p
    Temp Range(s) -40 to +125
    Package MSOP,SOIC
    Reference Type Series

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