Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier Data Sheet AD8628/AD8629/AD8630 FEATURES PIN CONFIGURATIONS Lowest auto-zero amplifier noise OUT 1 5 V+ Low offset voltage: 1 V AD8628 TOP VIEW V 2 Input offset drift: 0.002 V/C (Not to Scale) Rail-to-rail input and output swing +IN 3 4 IN 5 V single-supply operation Figure 1. 5-Lead TSOT (UJ-5) and 5-Lead SOT-23 (RJ-5) High gain, CMRR, and PSRR: 130 dB Very low input bias current: 100 pA maximum Low supply current: 1.0 mA NC 1 8 NC Overload recovery time: 50 s AD8628 IN 2 7 V+ No external components required +IN 3 6 OUT TOP VIEW Qualified for automotive applications (Not to Scale) V 4 5 NC NC = NO CONNECT APPLICATIONS Figure 2. 8-Lead SOIC N (R-8) Automotive sensors Pressure and position sensors Strain gage amplifiers OUT A 1 8 V+ Medical instrumentation AD8629 IN A 2 7 OUT B TOP VIEW +IN A 3 6 IN B Thermocouple amplifiers (Not to Scale) V 4 5 +IN B Precision current sensing Photodiode amplifiers Figure 3. 8-Lead SOIC N (R-8) and 8-Lead MSOP (RM-8) GENERAL DESCRIPTION OUT A 1 14 OUT D This amplifier has ultralow offset, drift, and bias current. IN A 2 13 IN D The AD8628/AD8629/AD8630 are wide bandwidth auto-zero +IN A 3 12 +IN D AD8630 amplifiers featuring rail-to-rail input and output swing and low V+ 4 TOP VIEW 11 V (Not to Scale) +IN B 5 10 +IN C noise. Operation is fully specified from 2.7 V to 5 V single supply IN B 6 9 IN C (1.35 V to 2.5 V dual supply). OUT B 7 8 OUT C The AD8628/AD8629/AD8630 provide benefits previously Figure 4. 14-Lead SOIC N (R-14) and 14-Lead TSSOP (RU-14) found only in expensive auto-zeroing or chopper-stabilized amplifiers. Using Analog Devices, Inc., topology, these zero- drift amplifiers combine low cost with high accuracy and low The AD8628/AD8629/AD8630 are specified for the extended noise. No external capacitor is required. In addition, the AD8628/ industrial temperature range (40C to +125C). The AD8628 AD8629/AD8630 greatly reduce the digital switching noise is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead found in most chopper-stabilized amplifiers. narrow SOIC plastic packages. The AD8629 is available in the With an offset voltage of only 1 V, drift of less than 0.005 V/C, standard 8-lead narrow SOIC and MSOP plastic packages. The and noise of only 0.5 V p-p (0 Hz to 10 Hz), the AD8628/ AD8630 quad amplifier is available in 14-lead narrow SOIC and AD8629/AD8630 are suited for applications where error 14-lead TSSOP plastic packages. See the Ordering Guide for sources cannot be tolerated. Position and pressure sensors, automotive grades. medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. Many systems can take advantage of the rail-to-rail input and output swings provided by the AD8628/AD8629/AD8630 to reduce input biasing complexity and maximize SNR. Rev. K Document Feedback 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 20022014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 02735-001 02735-002 02735-066 02735-063AD8628/AD8629/AD8630 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Peak-to-Peak Noise .................................................................... 16 Applications ....................................................................................... 1 Noise Behavior with First-Order, Low-Pass Filter ................. 16 General Description ......................................................................... 1 Total Integrated Input-Referred Noise for First-Order Filter16 Pin Configurations ........................................................................... 1 Input Overvoltage Protection ................................................... 17 Revision History ............................................................................... 3 Output Phase Reversal ............................................................... 17 Specifications ..................................................................................... 4 Overload Recovery Time .......................................................... 17 Electrical CharacteristicsV = 5.0 V ....................................... 4 Infrared Sensors .......................................................................... 18 S Electrical CharacteristicsVS = 2.7 V ....................................... 5 Precision Current Shunt Sensor ............................................... 19 Absolute Maximum Ratings ............................................................ 6 Output Amplifier for High Precision DACs ........................... 19 Thermal Characteristics .............................................................. 6 Outline Dimensions ....................................................................... 20 ESD Caution .................................................................................. 6 Ordering Guide .......................................................................... 22 Typical Performance Characteristics ............................................. 7 Automotive Products ................................................................. 22 Functional Description .................................................................. 15 1/f Noise ....................................................................................... 15 Rev. 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