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ADR1581:  1.25 V Micropower, Precision Shunt Voltage Reference

Product Details

Product Status:Recommended for New Designs

The ADR1581 is a low cost, 2-terminal (shunt), precision band gap reference. It provides an accurate 1.25 V output for input currents between 60 UA and 10 mA.

The superior accuracy and stability of the ADR1581 is made possible by the precise matching and thermal tracking of on-chip components. Proprietary curvature correction design techniques have been used to minimize the nonlinearities in the voltage output temperature characteristics. The ADR1581 is stable with any value of capacitive load.

The low minimum operating current makes the ADR1581 ideal for use in battery-powered 3V or 5 V systems. However, the wide operating current range means that the ADR1581 is extremely versatile and suitable for use in a wide variety of high vurrent applications.

The ADR1581 is available in two grades, A and B, both of which are provided in the SOT23 and SC70 packages, the smallest surface-mount packages available. Both grades are specified over the industrial temperature range of -40°C to +85°C.

All Members of the ADR1581 Family
Model Vout Accuracy Tempco
ADR1581A 1.25 ±0.80% 100
ADR1581B 1.25 ±0.12% 50


  • Wide operating current range: 60uA to 10mA
  • Initial accuracy: ± .12%
  • Temperature drift: ± 50 ppm/°C
  • Output impedance: 0.5
  • Wide band noise (10 Hz to 10 kHz): 20uV rms
  • Operating temperature range: -40°C to +85°C

Pin Configuration Diagram for ADR1581

Design Tools,Models,Drivers & Software

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Price, packaging, availability

ADR1581 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADR1581ARTZ-R2 Status: Production 3 ld SOT-23 3 Ind Reel, 250 $0.99 $0.99 Y  Material Info Notify Me Purchase
ADR1581ARTZ-REEL7 Status: Production 3 ld SOT-23 3 Ind Reel, 3000 - $0.61 Y  Material Info PCN Purchase Sample
ADR1581BRTZ-R2 Status: Production 3 ld SOT-23 3 Ind Reel, 250 $1.16 $1.16 Y  Material Info Notify Me Purchase
ADR1581BRTZ-REEL7 Status: Production 3 ld SOT-23 3 Ind Reel, 3000 - $0.84 Y  Material Info PCN Purchase
Price Table Help

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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