Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers Data Sheet AD8551/AD8552/AD8554 FEATURES PIN CONFIGURATIONS Low offset voltage: 1 V 1 8 NC NC Input offset drift: 0.005 V/C IN A V+ AD8551 +IN A OUT A Rail-to-rail input and output swing V 4 5 NC 5 V/2.7 V single-supply operation NC = NO CONNECT High gain, CMRR, PSRR: 130 dB Figure 1. 8-Lead MSOP (RM Suffix) Ultralow input bias current: 20 pA Low supply current: 700 A/op amp 1 8 NC NC Overload recovery time: 50 s IN A 2 7 V+ AD8551 No external capacitors required +IN A 3 6 OUT A V 4 5 NC APPLICATIONS NC = NO CONNECT Temperature sensors Figure 2. 8-Lead SOIC (R Suffix) Pressure sensors Precision current sensing OUT A 1 8 V+ IN A OUT B Strain gage amplifiers AD8552 +IN A IN B V 4 5 +IN B Medical instrumentation Thermocouple amplifiers Figure 3. 8-Lead TSSOP (RU Suffix) GENERAL DESCRIPTION OUT A 1 8 V+ This family of amplifiers has ultralow offset, drift, and bias IN A 2 7 OUT B AD8552 current. The AD8551, AD8552, and AD8554 are single, dual, +IN A 6 3 IN B V 4 5 +IN B and quad amplifiers featuring rail-to-rail input and output swings. All are guaranteed to operate from 2.7 V to 5 V with a single supply. Figure 4. 8-Lead SOIC (R Suffix) The AD8551/AD8552/AD8554 provide the benefits previously OUT A 1 14 OUT D found only in expensive auto-zeroing or chopper-stabilized IN A IN D +IN A +IN D amplifiers. Using Analog Devices, Inc. topology, these new V+ AD8554 V +IN B +IN C zero-drift amplifiers combine low cost with high accuracy. No IN B IN C OUT B OUT C external capacitors are required. 7 8 Figure 5. 14-Lead TSSOP (RU Suffix) With an offset voltage of only 1 V and drift of 0.005 V/C, the AD8551/AD8552/AD8554 are perfectly suited for applications 1 OUT A 14 OUT D in which error sources cannot be tolerated. Temperature, 2 IN A 13 IN D position and pressure sensors, medical equipment, and strain 3 12 +IN A +IN D gage amplifiers benefit greatly from nearly zero drift over their 4 11 V+ V AD8554 operating temperature range. The rail-to-rail input and output 5 10 +IN B +IN C swings provided by the AD8551/AD8552/AD8554 make both 6 9 IN B IN C high-side and low-side sensing easy. 7 8 OUT B OUT C The AD8551/AD8552/AD8554 are specified for the extended Figure 6. 14-Lead SOIC (R Suffix) industrial/automotive temperature range (40C to +125C). The AD8551 single amplifier is available in 8-lead MSOP and 8-lead narrow SOIC packages. The AD8552 dual amplifier is available in 8-lead narrow SOIC and 8-lead TSSOP surface- mount packages. The AD8554 quad is available in 14-lead narrow SOIC and 14-lead TSSOP packages. Rev. F 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 19992015 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 01101-002 01101-004 01101-001 01101-003 01101-005 01101-006AD8551/AD8552/AD8554 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 1/f Noise Characteristics ........................................................... 16 Applications ....................................................................................... 1 Intermodulation Distortion ...................................................... 17 General Description ......................................................................... 1 Broadband and External Resistor Noise Considerations ...... 18 Pin Configurations ........................................................................... 1 Output Overdrive Recovery ...................................................... 18 Revision History ............................................................................... 2 Input Overvoltage Protection ................................................... 18 Specif icat ions ..................................................................................... 3 Output Phase Reversal ............................................................... 18 Electrical Characteristics ............................................................. 3 Capacitive Load Drive ............................................................... 19 Absolute Maximum Ratings ............................................................ 5 Power-Up Behavior .................................................................... 19 Thermal Characteristics .............................................................. 5 Applications Information .............................................................. 20 ESD Caution .................................................................................. 5 A 5 V Precision Strain Gage Circuit ........................................ 20 Typical Performance Characteristics ............................................. 6 3 V Instrumentation Amplifier ................................................ 20 Functional Description .................................................................. 14 A High Accuracy Thermocouple Amplifier ........................... 21 Amplifier Architecture .............................................................. 14 Precision Current Meter ............................................................ 21 Basic Auto-Zero Amplifier Theory .......................................... 14 Precision Voltage Comparator .................................................. 21 High Gain, CMRR, PSRR .......................................................... 15 Outline Dimensions ....................................................................... 22 Maximizing Performance Through Proper Layout ............... 16 Ordering Guide .......................................................................... 24 REVISION HISTORY 6/15Rev. E to Rev. F 3/07Rev. B to Rev. C Change to Input Voltage Parameter, Table 3 ................................. 5 Changes to Specifications Section ................................................... 3 11/12Rev.D to Rev. E 2/07Rev. A to Rev. B Changes to Figure 68 ...................................................................... 21 Updated Format .................................................................. Universal Updated Outline Dimensions (RM-8) ......................................... 22 Changes to Figure 54 ...................................................................... 16 Changes to Ordering Guide .......................................................... 24 Deleted Spice Model Section ........................................................ 19 Deleted Figure 63, Renumbered Sequentially ............................ 19 9/08Rev. C to Rev. D Changes to Ordering Guide .......................................................... 24 Changes to Ordering Guide .......................................................... 23 11/02Rev. 0 to Rev. A Edits to Figure 60 ............................................................................ 16 Updated Outline Dimensions ....................................................... 20 Rev. F Page 2 of 24