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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 MSOP footprints.

Patented temperature drift curvature correction technique and XFET technology minimize nonlinearity of the voltage change with temperature. The XFET architecture offers ...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

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    • 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
    • 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

    Pin Configuration for ADR421

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    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.