Datasheet ADR1581 (Analog Devices)

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1.25 V Micropower, Precision Shunt Voltage Reference ADR1581 FEATURES PIN CONFIGURATION Wide operating range: 60 μA to 10 mA ADR1581 V+ 1 Initial accuracy: ±0.12% maximum Temperature drift: ±50 ppm/°C maximum 3 NC (OR V–) Output impedance: 0.5 Ω maximum V– 2 Wideband noise (10 Hz to 10 kHz): 20 μV rms TOP VIEW
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Operating temperature range: −40°C to +85°C NC = NO CONNECT
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High ESD rating
Figure 1. SOT-23
4 kV human body model 20 400 V machine model 18 Compact, surface-mount SOT-23 package 16 APPLICATIONS 14 Portable, battery-powered equipment Y 12 IT Cellular phones, notebook computers, PDAs, GPSs, 10 ANT and DMMs U Q 8 Computer workstations 6 Suitable for use with a wide range of video RAMDACs Smart industrial transmitters 4 PCMCIA cards 2 Automotive 0
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3 V/5 V, 8-bit to 12-bit data converters –20 –10 0 10 20
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TEMPERATURE DRIFT (ppm/°C)
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GENERAL DESCRIPTION
Figure 2. Reverse Voltage Temperature Drift Distribution The ADR15811 is a low cost, 2-terminal (shunt), precision band
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gap reference. It provides an accurate 1.250 V output for input
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currents between 60 μA and 10 mA.
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The superior accuracy and stability of the ADR1581 is made possible by the precise matching and thermal tracking of on-
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chip components. Proprietary curvature correction design
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techniques have been used to minimize the nonlinearities in
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the voltage output temperature characteristics. The ADR1581
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is stable with any value of capacitive load.
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The low minimum operating current makes the ADR1581 ideal
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for use in battery-powered 3 V or 5 V systems. However, the wide
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–5 –4 –3 –2 –1 0 1 2 3 4 5
0 2- operating current range means that the ADR1581 is extremely
OUTPUT ERROR (mV)
667 0 versatile and suitable for use in a wide variety of high current Figure 3. Reverse Voltage Error Distribution applications. The ADR1581 is available in two grades, A and B, both of which are provided in the SOT-23 package. Both grades are specified over the industrial temperature range of −40°C to +85°C. 1 Protected by U.S. Patent No. 5,969,657.
Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLYING THE ADR1581 TEMPERATURE PERFORMANCE VOLTAGE OUTPUT NONLINEARITY VS. TEMPERATURE REVERSE VOLTAGE HYSTERESIS OUTPUT IMPEDANCE VS. FREQUENCY NOISE PERFORMANCE AND REDUCTION TURN-ON TIME TRANSIENT RESPONSE PRECISION MICROPOWER LOW DROPOUT REFERENCE USING THE ADR1581 WITH 3 V DATA CONVERTERS OUTLINE DIMENSIONS ORDERING GUIDE