1.2 V Micropower, Precision Shunt Voltage Reference AD1580 PIN CONFIGURATIONS FEATURES Wide operating range: 50 A to 10 mA AD1580 AD1580 V+ 1 V 1 Initial accuracy: 0.1% maximum 3 NC (OR V) 3 NC (OR V) Temperature drift: 50 ppm/C maximum Output impedance: 0.5 maximum V 2 V+ 2 TOP VIEW TOP VIEW Wideband noise (10 Hz to 10 kHz): 20 V rms NC = NO CONNECT NC = NO CONNECT Operating temperature range: 40C to +85C Figure 1. SOT-23 Figure 2. SC70 High ESD rating 4 kV human body model 50 400 V machine model 45 Compact, surface-mount SOT-23 and SC70 packages 40 APPLICATIONS 35 Portable, battery-powered equipment 30 Cellular phones, notebook computers, PDAs, GPSs, 25 and DMMs 20 Computer workstations 15 Suitable for use with a wide range of video RAMDACs Smart industrial transmitters 10 PCMCIA cards 5 Automotive 0 3 V/5 V, 8-bit to 12-bit data converters 40 30 20 10 0 10 20 30 40 TEMPERATURE DRIFT (ppm/C) GENERAL DESCRIPTION Figure 3. Reverse Voltage Temperature Drift Distribution 1 The AD1580 is a low cost, 2-terminal (shunt), precision band 300 gap reference. It provides an accurate 1.225 V output for input currents between 50 A and 10 mA. 250 The superior accuracy and stability of the AD1580 is made 200 possible by the precise matching and thermal tracking of on-chip components. Proprietary curvature correction 150 design techniques have been used to minimize the nonli- nearities in the voltage output temperature characteristics. 100 The AD1580 is stable with any value of capacitive load. The low minimum operating current makes the AD1580 50 ideal for use in battery-powered 3 V or 5 V systems. However, the wide operating current range means that the AD1580 is 0 10 8 6 4 2 0 2 4 6 8 10 extremely versatile and suitable for use in a wide variety of OUTPUT ERROR (mV) high current applications. Figure 4. Reverse Voltage Error Distribution The AD1580 is available in two grades, A and B, both of which are provided in the SOT-23 and SC70 packages, the smallest surface-mount packages available. Both grades are specified over the industrial temperature range of 40C to +85C. 1 Protected by U.S. Patent No. 5,969,657. Rev. F 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 Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2003-2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. QUANTITY QUANTITY 00700-001 00700-003 00700-004 00700-002AD1580 TABLE OF CONTENTS Features .............................................................................................. 1 Voltage Output Nonlinearity vs. Temperature ..........................7 Applications ....................................................................................... 1 Reverse Voltage Hysteresis ...........................................................7 General Description ......................................................................... 1 Output Impedance vs. Frequency ...............................................7 Pin Configurations ........................................................................... 1 Noise Performance and Reduction .............................................8 Revision History ............................................................................... 2 Turn-On Time ...............................................................................8 Specifications ..................................................................................... 3 Transient Response .......................................................................9 Absolute Maximum Ratings ............................................................ 4 Precision Micropower Low Dropout Reference .......................9 ESD Caution .................................................................................. 4 Using the AD1580 with 3 V Data Converters ...........................9 Typical Performance Characteristics ............................................. 5 Outline Dimensions ....................................................................... 11 Theory of Operation ........................................................................ 6 Ordering Guide .......................................................................... 12 Applying the AD1580 .................................................................. 6 Package Branding Information ................................................ 12 Temperature Performance ........................................................... 6 REVISION HISTORY 7/11Rev. E to Rev. F Updated Outline Dimensions ....................................................... 11 Changes to Ordering Guide .......................................................... 12 Changes to Ordering Guide .......................................................... 12 7/11Rev. D to Rev. E Updated Outline Dimensions ....................................................... 11 7/04Rev. A to Rev. B Changes to Ordering Guide .......................................................... 12 Changes to Ordering Guide .............................................................2 1/08Rev. C to Rev. D 10/03Rev. 0 to Rev. A Changes to Figure 5 .......................................................................... 5 Renumbered Figures and TPCs ........................................ Universal Changes to Figure 6 Caption ........................................................... 5 Edits to Features .................................................................................1 Changes to Ordering Guide .......................................................... 12 Edits to General Description ...........................................................1 Edits to Ordering Guide ...................................................................2 7/06Rev. B to Rev. C Updated Figures 5 Through 7 ..........................................................4 Updated Format .................................................................. Universal Updated Outline Dimensions ..........................................................8 Changes to Figure 13 ........................................................................ 7 Changes to Figure 16 ........................................................................ 8 Rev. F Page 2 of 12