Single and Dual-Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier Data Sheet AD623 FEATURES GENERAL DESCRIPTION Easy to use The AD623 is an integrated, single- or dual-supply instrumentation Rail-to-rail output swing amplifier that delivers rail-to-rail output swing using supply Input voltage range extends 150 mV below ground voltages from 2.7 V to 12 V. The AD623 offers user flexibility by (single supply) allowing single gain set resistor programming and by conforming Low power, 550 A maximum quiescent current to the 8-lead industry standard pinout configuration. With no Gain set with one external resistor external resistor, the AD623 is configured for unity gain (G = 1), Gain range: 1 to 1000 and with an external resistor, the AD623 can be programmed for High accuracy dc performance gains of up to 1000. 0.10% gain error (G = 1) The accuracy of the AD623 is the result of increasing ac 0.35% gain error (G > 1) common-mode rejection ratio (CMRR) coincident with Noise: 35 nV/Hz RTI noise at 1 kHz increasing gain. Line noise harmonics are rejected due to Optimal dynamic specifications constant CMRR up to 200 Hz. The AD623 has a wide input 800 kHz bandwidth (G = 1) common-mode range and amplifies signals with common- 20 s settling time to 0.01% (G = 10) mode voltages as low as 150 mV below ground. The AD623 maintains optimal performance with dual and single polarity APPLICATIONS power supplies. Low power medical instrumentation Transducer interfaces Table 1. Low Power Upgrades for the AD623 Thermocouple amplifiers Typical Quiescent Industrial process controls Part No. Total Supply Voltage, VS (V dc) Current, IQ (A) Difference amplifiers AD8235 5.5 30 Low power data acquisition AD8236 5.5 33 AD8237 5.5 33 AD8226 36 350 AD8227 36 325 AD8420 36 85 AD8422 36 300 AD8426 36 325 (per channel) FUNCTIONAL BLOCK DIAGRAM +V S 2 7 IN 50k 50k A1 V DIFF 2 + R 50k G 6 V CM 1 A3 OUTPUT R V G DIFF 8 50k 2 + +R G +IN 50k 50k 5 3 4 A2 REF V S Figure 1. Rev. G 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 2020 Analog Devices, Inc. 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Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 00778-054AD623 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Basic Connection ....................................................................... 24 Applications ....................................................................................... 1 Gain Selection ............................................................................. 24 General Description ......................................................................... 1 Reference Terminal .................................................................... 24 Functional Block Diagram .............................................................. 1 Input and Output Offset Voltage Error ................................... 24 Revision History ............................................................................... 2 Input Protection ......................................................................... 25 Specifications ..................................................................................... 4 RF Interference ........................................................................... 25 Single Supply ................................................................................. 4 Grounding ................................................................................... 26 Dual Supplies ................................................................................ 6 Input Differential and Common-Mode Range vs. Supply and Gain .............................................................................................. 28 Specifications Common to Dual and Single Supplies ............. 8 Additional Information ............................................................. 29 Absolute Maximum Ratings ............................................................ 9 Evaluation Board ............................................................................ 30 ESD Caution .................................................................................. 9 General Description ................................................................... 30 Pin Configuration and Function Descriptions ........................... 10 Outline Dimensions ....................................................................... 31 Typical Performance Characteristics ........................................... 11 Ordering Guide .......................................................................... 32 Theory of Operation ...................................................................... 23 Applications Information .............................................................. 24 REVISION HISTORY 9/2020Rev. F to Rev. G 4/2018Rev. E to Rev. F Changed AD623A to AD623ANZ, AD623ARZ and AD623B to Changes to Gain Error Parameter, Nonlinearity Parameter, Offset Referred to the Input vs. Supply (PSR) Parameter, and AD623BNZ, AD623BRZ .............................................. Throughout Changes to General Description Section ...................................... 1 Output Swing Parameter, Table 2 .................................................... 3 Changes to Figure 5 Caption, Figure 6 Caption, and Figure 8 Changes to Gain Error Parameter and Offset Referred to the Caption ............................................................................................. 10 Input vs. Supply (PSR) Parameter, Table 3 ..................................... 5 Changes to Figure 10 Caption, Figure 11, Figure 12, Figure 13, Changes to Current Noise Parameter, Table 4 ............................... 7 and Figure 14 ................................................................................... 12 Changes to Ordering Guide .......................................................... 26 Changes to Figure 15 to Figure 20 ................................................ 13 Changes to Figure 21 to Figure 26 ................................................ 14 6/2016Rev. D to Rev. E Changes to Features Section, General Description Section, Changes to Figure 27 to Figure 32 ................................................ 15 Changes to Figure 33 to Figure 38 ................................................ 16 and Figure 1 ........................................................................................1 Changes to Figure 39 to Figure 40 ................................................ 17 Deleted Connection Diagram Section ............................................ 1 Added Figure 41 to Figure 44 Renumbered Sequentially ........ 17 Added Functional Block Diagram Section and Table 1 Added Figure 45 to Figure 50 ........................................................ 18 Renumbered Sequentially ................................................................ 1 Added Figure 51 to Figure 56 ........................................................ 19 Changes to Single Supply Section ................................................... 3 Added Figure 57 to Figure 62 ........................................................ 20 Changes to Table 3 ............................................................................. 6 Added Figure 63 to Figure 66 ........................................................ 21 Changed Both Dual and Single Supplies Section to Specifications Common to Dual and Single Supplies Section .... 7 Deleted Single-Supply Data Acquisition System Section and Figure 53 Renumbered Sequentially ........................................... 21 Changes to Table 5 ............................................................................. 8 Added Figure 67 to Figure 69 ........................................................ 22 Added Pin Configuration and Function Descriptions Section, Change to Figure 70 ....................................................................... 23 Figure 2, and Table 6 Renumbered Sequentially .......................... 9 Changes to Basic Connection Section and Reference Terminal Changes to Figure 5 Caption, Figure 6 Caption, and Section .............................................................................................. 24 Figure 8 Caption ............................................................................. 10 Changes to RF Interference Section ............................................ 25 Changes to Figure 17 Caption through Figure 20 Caption ...... 11 Change to Figure 77 ....................................................................... 26 Changes to Figure 21 Caption through Figure 26 Caption ...... 12 Changes to Figure 79 and Output Buffering Section ................. 27 Changes to Figure 27 Caption and Figure 28 Caption .............. 13 Changes to Input Differential and Common-Mode Range vs. Changes to Theory of Operation Section.................................... 17 Supply and Gain Section ................................................................ 28 Changes to Basic Connection Section ......................................... 18 Changes to Ordering Guide .......................................................... 32 Changes to Input and Output Offset Voltage Error Section, and Input Protection Section ................................................................ 19 Rev. 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