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 IN 2 AD8628 7 V+ No external components required +IN 3 6 OUT TOP VIEW Qualified for automotive applications (Not to Scale) V 4 5 NC APPLICATIONS NC = NO CONNECT Automotive sensors Figure 2. 8-Lead SOIC N (R-8) Pressure and position sensors Strain gage amplifiers Medical instrumentation OUT A 1 8 V+ Thermocouple amplifiers AD8629 IN A 2 7 OUT B TOP VIEW Precision current sensing +IN A 3 6 IN B (Not to Scale) V 4 5 +IN B Photodiode amplifiers Figure 3. 8-Lead SOIC N (R-8) and 8-Lead MSOP (RM-8) GENERAL DESCRIPTION This amplifier has ultralow offset, drift, and bias current. The AD8628/AD8629/AD8630 are wide bandwidth auto-zero 1 14 OUT D OUT A amplifiers featuring rail-to-rail input and output swing and low IN A 2 13 IN D noise. Operation is fully specified from 2.7 V to 5 V single supply +IN A 3 12 +IN D AD8630 (1.35 V to 2.5 V dual supply). V+ 4 TOP VIEW 11 V (Not to Scale) +IN B 5 10 +IN C The AD8628/AD8629/AD8630 provide benefits previously IN B 6 9 IN C found only in expensive auto-zeroing or chopper-stabilized OUT B 7 8 OUT C amplifiers. Using Analog Devices, Inc., topology, these zero- Figure 4. 14-Lead SOIC N (R-14) and 14-Lead TSSOP (RU-14) drift amplifiers combine low cost with high accuracy and low noise. No external capacitor is required. In addition, the AD8628/ AD8629/AD8630 greatly reduce the digital switching noise The AD8628/AD8629/AD8630 are specified for the extended found in most chopper-stabilized amplifiers. industrial temperature range (40C to +125C). The AD8628 With an offset voltage of only 1 V, drift of less than 0.005 V/C, is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead and noise of only 0.5 V p-p (0.1 Hz to 10 Hz), the AD8628/ narrow SOIC plastic packages. The AD8629 is available in the AD8629/AD8630 are suited for applications where error standard 8-lead narrow SOIC and MSOP plastic packages. The sources cannot be tolerated. Position and pressure sensors, AD8630 quad amplifier is available in 14-lead narrow SOIC medical equipment, and strain gage amplifiers benefit greatly and 14-lead TSSOP plastic packages. See the Ordering Guide from nearly zero drift over their operating temperature range. section for automotive grades. 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. L 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. Tel: 781.329.4700 20022020 Analog Devices, Inc. All rights reserved. No license is granted by implication or otherwise under any patent or patent rights of Analog Technical Support www.analog.com Devices. Trademarks and registered trademarks are the property of their respective owners. 02 73 5-002 027 35 -0 01 02735-066 0 2735 -06 3AD8628/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 Filter ....................................................................................................... 16 Pin Configurations ........................................................................... 1 Input Overvoltage Protection ................................................... 17 Revision History ............................................................................... 2 Output Phase Reversal ............................................................... 17 Specifications .................................................................................... 4 Overload Recovery Time .......................................................... 17 Electrical CharacteristicsV = 5.0 V ....................................... 4 S Infrared Sensors ......................................................................... 18 Electrical CharacteristicsV = 2.7 V ....................................... 5 S 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 REVISION HISTORY 2/2008Rev. E to Rev. F 5/2020Rev. K to Rev. L Renamed TSOT-23 to TSOT ............................................ Universal Changes to General Description Section ...................................... 1 Deleted Figure 4 and Figure 6 ......................................................... 1 Change to Electrical CharacteristicsV = 2.7 V Section .......... 5 S Changes to Figure 3 and Figure 4 Captions .................................. 1 Changes to Ordering Guide .......................................................... 22 Changes to Table 1 ............................................................................ 3 8/2014Rev. J to Rev. K Changes to Table 2 ............................................................................ 4 Changes to Figure 36 and Figure 37 ............................................ 12 Changes to Table 4 ............................................................................ 5 Updated Outline Dimensions ...................................................... 19 2/2014Rev. I to Rev. J Changes to Ordering Guide .......................................................... 20 Moved Revision History .................................................................. 3 5/2005Rev. D to Rev. E Changes to Figure 17 and Figure 18 .............................................. 9 Updated Outline Dimensions ....................................................... 20 Changes to Ordering Guide .......................................................... 22 4/2011Rev. H to Rev. I 1/2005Rev. C to Rev. D Updated Outline Dimensions ....................................................... 19 Added AD8630 ................................................................... Universal Changes to Ordering Guide .......................................................... 21 Added Figure 5 and Figure 6 ........................................................... 1 Changes to Caption in Figure 8 and Figure 9 ............................... 7 4/2010Rev. G to Rev. H Changes to Caption in Figure 14 .................................................... 8 Change to Features List ................................................................... 1 Changes to Figure 17 ........................................................................ 8 Change to General Description Section ........................................ 1 Changes to Figure 23 and Figure 24 ............................................... 9 Changes to Table 3 ........................................................................... 5 Changes to Figure 25 and Figure 26 ............................................ 10 Updated Outline Dimensions Section ......................................... 19 Changes to Figure 31 ..................................................................... 11 Changes to Ordering Guide .......................................................... 21 Changes to Figure 40, Figure 41, Figure 42 ................................ 12 6/2008Rev. F to Rev. G Changes to Figure 43 and Figure 44 ............................................ 13 Changes to Figure 51 ..................................................................... 15 Changes to Features Section ........................................................... 1 Updated Outline Dimensions ...................................................... 20 Changes to Table 5 and Figure 42 Caption ................................. 12 Changes to Ordering Guide .......................................................... 20 Changes to 1/f Noise Section and Figure 49 ............................... 14 Changes to Figure 51 Caption and Figure 55 ............................. 15 Changes to Figure 57 Caption and Figure 58 Caption .............. 16 Changes to Figure 60 Caption and Figure 61 Caption .............. 17 Changes to Figure 64 ..................................................................... 18 Rev. L Page 2 of 24