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AD623-EVALZ 데이터시트(PDF) 1 Page - Analog Devices |
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AD623-EVALZ 데이터시트(HTML) 1 Page - Analog Devices |
1 / 4 page Evaluation Board for the AD623 AD623-EVALZ Rev. 0 Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresult from its use. Analog Devices reserves the right to change devices or specifications at any time without notice.Trademarks and registered trademarks are the property of their respective owners. Evaluationboardsarenotauthorizedtobeusedinlifesupportdevicesorsystems. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Accepts SOIC or PDIP packages Configurable for dual or single supplies Provision for optional circuitry Shield driver Adjustable offset/reference GENERAL DESCRIPTION The AD623-EVALZ is an easy-to-use accessory for evaluating the AD623 instrumentation amplifier. In addition to the basic in-amp connection, circuit options enable the user to adjust the offset voltage, apply an output reference, or provide shield drivers with user-supplied components. The board is shipped with a surface-mount package installed, and it has an alternative footprint for a through-hole, 8-lead PDIP. BASIC OPERATION The AD623 converts a differential signal to a single-ended signal with respect to a reference. User-supplied power supplies connect +VS, –VS, and ground to pins of the AD623 on the evaluation board. The differential signal is applied to the +IN and –IN pins of the AD623, and the output is monitored at the in-amp’s OUTPUT pin. Figure 2 shows the component layout and location of connections. FUNCTIONAL BLOCK DIAGRAM 5 W15 A3 OUTPUT REF 7 4 5 6 OUTPUT EXT_REF R8 2 3 7 4 6 6 4 7 OFFSET ADJ. OP177 W13 W11 W12 2 3 8 1 W8 W10 3 8 1 2 W5 W9 W2 W1 W3 GND2 +IN +GUARD –GUARD –IN GND1 W14 A2 A2 A1 R2 100Ω R4 100Ω REMOVE W3 AND W4 FOR AC COUPLING. C1, 0.1µF +VAUX C6 0.1µF C5 0.1µF –VAUX R3 100kΩ1 R5 100kΩ1 R52 R62 W4 C3, 0.1µF RG –RG +RG +VS –VS C4 0.1µF C2 0.1µF C10 0.1µF C7 0.1µF +VAUX –VAUX –VAUX C8 0.1µF OP177 CS2 J500 240µA CS2 J500 240µA R9 5.9kΩ, 1% R10 5.9kΩ, 1% R1 100kΩ C9 0.1µF NOTES 1INSTALL FOR AC COUPLING ONLY. 2TO USE GUARD DRIVER, INSTALL R5 AND R6 2INSTEAD OF RG. R5 AND R6 = 0.5RG. W6 W7 C12 10µF 25V C11 10µF 25V GND + + –VAUX +VAUX +VS –VS COMPONENTS IN SHADED AREAS ARE USER SUPPLIED. + – Figure 1. |
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