Features and Benefits

  • Maximum temperature coefficient (TCVOUT):
    • 0.8 ppm/°C (D grade 0°C to 70°C)
    • 1 ppm/°C (C grade 0°C to 70°C)
    • 2 ppm/°C (B grade −40°C to +125°C)
    • 4 ppm/°C (A grade −40°C to +125°C)
  • Output noise (0.1 Hz to 10 Hz):
  • 1 μV p-p at VOUT of 2.048 V typical
  • Initial output voltage error:
    • B, C, D grade: ±0.02% (maximum)
  • Input voltage range: 3 V to 15 V
  • Operating temperature:
    • A grade and B grade: −40°C to +125°C
    • C grade: 0°C to +70°C
  • Output current: +10 mA source/−10 mA sink
  • Low quiescent current: 950 μA (maximum)
  • Low dropout voltage: 300 mV at 2 mA (VOUT ≥ 3 V)
  • 8-lead SOIC package and LCC package
  • AEC-Q100 qualified for automotive applications
  • Long-term drift: 8 ppm typical at 4500 hours

Product Details

The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 devices are high precision, low power, low noise voltage references featuring ±0.02% B, C, and D grade maximum initial error, excellent temperature stability, and low output noise.

This family of voltage references uses an innovative core topology to achieve high accuracy while offering industry-leading temperature stability and noise performance. The low, thermally induced output voltage hysteresis and low long-term output voltage drift of the devices also improve system accuracy over time and temperature variations.

A maximum operating current of 950 μA and a maximum low dropout voltage of 300 mV allow the devices to function very well in portable equipment.

The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 series of references are each provided in an 8-lead SOIC and are available in a wide range of output voltages, all of which are specified over the extended industrial temperature range of −40°C to +125°C.


  • Precision data acquisition systems
  • High resolution data converters
  • High precision measurement devices
  • Industrial instrumentation
  • Medical devices
  • Automotive battery monitoring

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Models for the following parts are available in LTspice:


Reference Designs (4)

Product Recommendations

ADR4525 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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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.

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