Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier Data Sheet AD8226 FEATURES PIN CONFIGURATION Gain set with 1 external resistor AD8226 IN 1 8 +V S Gain range: 1 to 1000 R 2 7 V G OUT Input voltage goes below ground R 3 6 REF G Inputs protected beyond supplies +IN 4 5 V S Very wide power supply range Single supply: 2.2 V to 36 V TOP VIEW (Not to Scale) Dual supplies: 1.35 V to 18 V Figure 1. Bandwidth (G = 1): 1.5 MHz CMRR (G = 1): 90 dB minimum for BR models Input noise: 22 nV/Hz 1 Table 1. Instrumentation Amplifiers by Category Typical supply current: 350 A General Zero Military Low High Speed Specified temperature: 40C to +125C Purpose Drift Grade Power PGA 8-lead SOIC and MSOP packages AD8220 AD8231 AD620 AD627 AD8250 APPLICATIONS AD8221 AD8290 AD621 AD623 AD8251 AD8222 AD8293 AD524 AD8223 AD8253 Industrial process controls Bridge amplifiers AD8224 AD8553 AD526 AD8226 Medical instrumentation AD8228 AD8556 AD624 AD8227 Portable data acquisition AD8295 AD8557 AD8235/ AD8236 Multichannel systems 1 Visit www.analog.com for the latest instrumentation amplifiers. GENERAL DESCRIPTION The AD8226 is a low cost, wide supply range instrumentation AD8226 can handle voltages beyond the rails. For example, amplifier that requires only one external resistor to set any gain with a 5 V supply, the part is guaranteed to withstand 35 V between 1 and 1000. at the input with no damage. Minimum as well as maximum input bias currents are specified to facilitate open wire detection. The AD8226 is designed to work with a variety of signal voltages. A wide input range and rail-to-rail output allow the The AD8226 is perfect for multichannel, space-constrained signal to make full use of the supply rails. Because the input industrial applications. Unlike other low cost, low power range also includes the ability to go below the negative supply, instrumentation amplifiers, the AD8226 is designed with small signals near ground can be amplified without requiring dual a minimum gain of 1 and can easily handle 10 V signals. supplies. The AD8226 operates on supplies ranging from 1.35 V With its MSOP package and 125C temperature rating, the to 18 V for dual supplies and 2.2 V to 36 V for single supply. AD8226 thrives in tightly packed, zero airflow designs. The robust AD8226 inputs are designed to connect to real- The AD8226 is available in 8-lead MSOP and SOIC packages, world sensors. In addition to its wide operating range, the and is fully specified for 40C to +125C operation. For a device with a similar package and performance as the AD8226 but with gain settable from 5 to 1000, consider using the AD8227. Rev. D 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 20092019 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 07036-001AD8226 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Gain Selection ............................................................................. 19 Applications ....................................................................................... 1 Reference Terminal .................................................................... 20 Pin Configuration ............................................................................. 1 Input Voltage Range ................................................................... 20 General Description ......................................................................... 1 Layout .......................................................................................... 20 Revision History ............................................................................... 2 Input Bias Current Return Path ............................................... 21 Specif icat ions ..................................................................................... 3 Input Protection ......................................................................... 22 Absolute Maximum Ratings ............................................................ 7 Radio Frequency Interference (RFI) ........................................ 22 Thermal Resistance ...................................................................... 7 Applications Information .............................................................. 23 ESD Caution .................................................................................. 7 Differential Drive ....................................................................... 23 Pin Configuration and Function Descriptions ............................. 8 Precision Strain Gage ................................................................. 24 Typical Performance Characteristics ............................................. 9 Driving an ADC ......................................................................... 24 Theory of Operation ...................................................................... 19 Outline Dimensions ....................................................................... 25 Architec ture ................................................................................. 19 Ordering Guide .......................................................................... 25 REVISION HISTORY 10/2019Rev. C to Rev. D 7/2009Rev. 0 to Rev. A Changes to Table 4 ............................................................................ 7 Added BRZ and BRM Models .......................................... Universal Changes to Features Section ............................................................ 1 9/2012Rev. B to Rev. C Changes to Table 1 ............................................................................. 1 Changes to General Description Section ....................................... 1 Changes to CMRR, Voltage Offset, Input Offset Current, and Gain Error Parameters, Table 2....................................................... 3 Changes to Gain vs. Temperature Parameter, Output Changes to CMRR, Voltage Offset, and Input Offset Current Parameter, and Operating Range Parameter, Table 2 ........................ 4 Parameters, Table 2 ........................................................................... 5 Changes to Common-Mode Rejection Ratio (CMRR) Parameter and to Input Offset, V , Average Temperature Coefficient OSO 3/2011Rev. A to Rev. B Parameter, Table 3 ............................................................................. 5 Added AD8235/AD8236 to Table 1 ............................................... 1 Changes to Gain vs. Temperature Parameter, Table 3 .................. 6 Changes to Endnote 1, Table 2 ........................................................ 4 Changes to Gain Selection Section .............................................. 19 Change Endnote 2 Placement in Total Noise Equation, Table 3 ...... 5 Changes to Reference Terminal Section and Input Voltage Added G > 1 BRZ, BRMZ Max Parameter .................................... 6 Range Section .................................................................................. 20 Changes to Endnote 1, Table 3 ........................................................ 6 Changes to Ordering Guide .......................................................... 25 Changes to Figure 18 ...................................................................... 11 Changes to Figure 37 ...................................................................... 14 1/2009Revision 0: Initial Version Changes to Figure 42 ...................................................................... 15 Updated Outline Dimensions ....................................................... 25 Rev. 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