groupUrl: https://ez.analog.com/amplifiers/
Analog.com Analog Dialogue Wiki English
Analog.com Analog Dialogue Wiki 简体中文
EngineerZone
EngineerZone
  • Site
  • User
  • Site
  • Search
  • User
EngineerZone
EngineerZone
  • Log in
  • Site
  • Search
  • Log in
  • Home
  • Blogs ⌵
    • EZ Spotlight
    • The Engineering Mind
  • Browse ⌵
    • All Groups
    • All Members
  • Support ⌵
    • 3D ToF Depth Sensing
    • A2B
    • Aerospace and Defense (ADEF)
    • Amplifiers
    • Analog Microcontrollers
    • Analysis Control Evaluation (ACE) Software
    • Audio
    • Clock and Timing
    • Condition-Based Monitoring
    • Data Converters
    • Design Tools and Calculators
    • Direct Digital Synthesis (DDS)
    • Embedded Vision Sensing
    • Energy Monitoring and Metering
    • FPGA Reference Designs
    • Industrial Ethernet
    • Interface and Isolation
    • Low Power RF Transceivers
    • MEMS Inertial Sensors
    • Motor Control Hardware Platforms
    • Optical Sensing
    • Power Management
    • Precision Technology Signal Chains
    • Processors and DSP
    • Reference Circuits
    • RF and Microwave
    • Signal Chain Power (SCP)
    • Switches/Multiplexers
    • Temperature Sensors
    • Video
    • Wide Band RF Transceivers
    • Wireless Sensor Networks Reference Library
  • About EZ
  • More
  • Cancel
  • 主页
  • 浏览 ⌵
    • 收件箱
    • 个人设置
    • 会员
    • 专区列表
  • 论坛专区 ⌵
    • 放大器专区
    • 精密转换器专区
    • 音频专区
    • ADE电能计量专区
    • MEMS和传感器专区
    • 接口和隔离专区
    • Power 中文专区
    • ADUC微处理器专区
    • 锁相环专区
    • 开关和多路复用器专区
    • 温度传感器
    • 基准电压源专区
    • 资源库
    • 论坛使用指南
    • 技术支持参考库
    • 在线研讨会
    • 论坛社群活动
    • 论坛激励活动
  • More
  • Cancel
Amplifiers
Amplifiers
Documents AD623_error output under stress
  • Q&A
  • Discussions
  • Documents
  • Video/Images
  • Tags
  • Managers
  • More
  • Cancel
  • New
Amplifiers requires membership for participation - click to join
  • +Documents
  • Tags List Amplifiers
  • +General Information: FAQ
  • +AD59: FAQ
  • +AD202: FAQ
  • +AD203: FAQ
  • +AD210: FAQ
  • +AD215:FAQ
  • +AD22100: FAQ
  • +AD22151: FAQ
  • +AD22151G: FAQ
  • +AD594: FAQ
  • +AD600: FAQ
  • +AD603: FAQ
  • +AD604: FAQ
  • +AD605: FAQ
  • +AD608: FAQ
  • +AD620: FAQ
  • +AD621: FAQ
  • -AD623: FAQ
    • AD623: Output impedance
    • AD623 instrumentation amplifier PCB guarding techniques
    • AD623_error output under stress
    • AD623: Low output maximum
    • AD623: Power on/off time
  • +AD623BRZ: FAQ
  • +AD626: FAQ
  • +AD628: FAQ
  • +AD629: FAQ
  • +AD630: FAQ
  • +AD632: FAQ
  • +AD633: FAQ
  • +AD636: FAQ
  • +AD637: FAQ
  • +AD664: FAQ
  • +AD734: FAQ
  • +AD7357BCPZ: FAQ
  • +AD736: FAQ
  • +AD811: FAQ
  • +AD817: FAQ
  • +AD822: FAQ
  • +AD823: FAQ
  • +AD825: FAQ
  • +AD829: FAQ
  • +AD846: FAQ
  • +AD855: FAQ
  • +AD8002: FAQ
  • +AD8005: FAQ
  • +AD80066: FAQ
  • +AD8009: FAQ
  • +AD8012: FAQ
  • +AD8015: FAQ
  • +AD8016: FAQ
  • +AD8019: FAQ
  • +AD8033: FAQ
  • +AD8036: FAQ
  • +AD8039: FAQ
  • +AD8041: FAQ
  • +AD8041S: FAQ
  • +AD8042: FAQ
  • +AD8045: FAQ
  • +AD8061: FAQ
  • +AD8066: FAQ
  • +AD8074: FAQ
  • +AD8075: FAQ
  • +AD8079: FAQ
  • +AD8105: FAQ
  • +AD8108: FAQ
  • +AD8111: FAQ
  • +AD8112: FAQ
  • +AD8113: FAQ
  • +AD8114: FAQ
  • +AD8128: FAQ
  • +AD8129: FAQ
  • +AD8130: FAQ
  • +AD8131: FAQ
  • +AD8132: FAQ
  • +AD8134: FAQ
  • +AD8137: FAQ
  • +AD8138: FAQ
  • +AD8138S: FAQ
  • +AD8139: FAQ
  • +AD8145: FAQ
  • +AD8174: FAQ
  • +AD8185: FAQ
  • +AD8191: FAQ
  • +AD8195: FAQ
  • +AD8207: FAQ
  • +AD8208: FAQ
  • +AD8210: FAQ
  • +AD8211: FAQ
  • +AD8214: FAQ
  • +AD8217: FAQ
  • +AD8218: FAQ
  • +AD8220: FAQ
  • +AD8221: FAQ
  • +AD8225: FAQ
  • +AD8227: FAQ
  • +AD8230: FAQ
  • +AD8231: FAQ
  • +AD8232: FAQ
  • +AD8237: FAQ
  • +AD8253: FAQ
  • +AD8265: FAQ
  • +AD8283: FAQ
  • +AD8295: FAQ
  • +AD8302: FAQ
  • +AD8304: FAQ
  • +AD8305: FAQ
  • +AD8306: FAQ
  • +AD8307: FAQ
  • +AD8309: FAQ
  • +AD8310: FAQ
  • +AD8314: FAQ
  • +AD8318: FAQ
  • +AD8319: FAQ
  • +AD8321: FAQ
  • +AD8324: FAQ
  • +AD8328: FAQ
  • +AD8330: FAQ
  • +AD8331: FAQ
  • +AD8332: FAQ
  • +AD8333: FAQ
  • +AD8334: FAQ
  • +AD8336: FAQ
  • +AD8337: FAQ
  • +AD8338: FAQ
  • +AD8339: FAQ
  • +AD8397: FAQ
  • +AD8421: FAQ
  • +AD8422: FAQ
  • +AD8428: FAQ
  • +AD8476: FAQ
  • +AD8495: FAQ
  • +AD8500: FAQ
  • +AD8515: FAQ
  • +AD8519: FAQ
  • +AD8532: FAQ
  • +AD8538: FAQ
  • +AD8541: FAQ
  • +AD8551: FAQ
  • +AD8552: FAQ
  • +AD8555: FAQ
  • +AD8556: FAQ
  • +AD8557: FAQ
  • +AD8561: FAQ
  • +AD8564: FAQ
  • +AD8567: FAQ
  • +AD8592: FAQ
  • +AD8597: FAQ
  • +AD8602: FAQ
  • +AD8605: FAQ
  • +AD8606: FAQ
  • +AD8608: FAQ
  • +AD8610: FAQ
  • +AD8611: FAQ
  • +AD8622: FAQ
  • +AD8624ARUZ: FAQ
  • +AD8628: FAQ
  • +AD8629: FAQ
  • +AD8638: FAQ
  • +AD8643ACPZ: FAQ
  • +AD8646: FAQ
  • +AD8648: FAQ
  • +AD8655: FAQ
  • +AD8661: FAQ
  • +AD8662: FAQ
  • +AD8666: FAQ
  • +AD8674: FAQ
  • +AD8675: FAQ
  • +AD8677: FAQ
  • +AD8682: FAQ
  • +AD9101: FAQ
  • +AD9257: FAQ
  • +ADA4000-2: FAQ
  • +ADA4004: FAQ
  • +ADA4077-2: FAQ
  • +ADA4096: FAQ
  • +ADA4096-2: FAQ
  • +ADA4302-4: FAQ
  • +ADA4350: FAQ
  • +ADA4411: FAQ
  • +ADA4500-2: FAQ
  • +ADA4528: FAQ
  • +ADA4528-X: FAQ
  • +ADA4637-1: FAQ
  • +ADA4661-2: FAQ
  • +ADA4666-2: FAQ
  • +ADA4807: FAQ
  • +ADA4807-2: FAQ
  • +ADA4817: FAQ
  • +ADA4895: FAQ
  • +ADA4897: FAQ
  • +ADA4897-1: FAQ
  • +ADA4898-2: FAQ
  • +ADA4899-1: FAQ
  • +ADA4922-1: FAQ
  • +ADA4927: FAQ
  • +ADA4930: FAQ
  • +ADA4938-1: FAQ
  • +ADA4940-1:FAQ
  • +ADA4941-1: FAQ
  • +ADA4950-1: FAQ
  • +ADA4960-1: FAQ
  • +ADCMP341: FAQ
  • +ADCMP343: FAQ
  • +ADCMP552: FAQ
  • +ADCMP553BRM: FAQ
  • +ADCMP566: FAQ
  • +ADCMP572: FAQ
  • +ADCMP573: FAQ
  • +ADCMP580: FAQ
  • +ADCMP600: FAQ
  • +ADCMP602: FAQ
  • +ADCMP609: FAQ
  • +EVAL-FW-BPDF1: FAQ
  • +EVAL-PRAOPAMP: FAQ
  • +MAT01: FAQ
  • +MAT02: FAQ
  • +Mat12: FAQ
  • +MAT14: FAQ
  • +OP07: FAQ
  • +OP1177: FAQ
  • +OP16: FAQ
  • +OP184: FAQ
  • +OP2177: FAQ
  • +OP279: FAQ
  • +OP27AZ: FAQ
  • +OP281: FAQ
  • +OP284: FAQ
  • +OP285: FAQ
  • +OP290: FAQ
  • +OP293: FAQ
  • +OP295GS: FAQ
  • +OP297GSZ: FAQ
  • +OP37: FAQ
  • +OP400S: FAQ
  • +OP4177: FAQ
  • +OP484AM: FAQ
  • +OP484S: FAQ
  • +OP497: FAQ
  • +OP90: FAQ
  • +OP97: FAQ
  • +Opamps: FAQ
  • +OPx177: FAQ
  • +REF01: FAQ
  • +REF02: FAQ
  • +REF02A: FAQ
  • +REF193: FAQ
  • +REF195: FAQ
  • +REF198: FAQ
  • +REF43NBC: FAQ
  • +Right Leg Drive (RLD): FAQ
  • +SFP-RDK: FAQ
  • +SPICE: FAQ
  • +UG-084: FAQ
  • +VGAs: FAQ

AD623_error output under stress

Q 

One of our customers meets an issue of AD623, Could you give any suggestion?
          The power is 3.3V single supply, REF pin is 720mV, Gain resistor is
470Ohm, Gain is about 210.
          When he twists the board, the AD623's output will also change. If he
twists counter-clockwise, the output will increase 0~8mV. if he twists
clockwise the output will decrease roughly 0~8mV. The input is from a bridge,
which share the power supply with AD623.  I tested the REF and Power when the
output changes, they are quite stable. 
          
           I also did the following test,

          1. Used 4 resistor to build a fixed output bridge, issue is still
there. So the problem is not from the sensor.
          2. Moved the Gain resistor and the Bridge to another board. AD623 was
the only component on the board, twist the board, problem was same. So problem
is not from the Gain resistor or bridge.
          3.Replaced AD623 with AD8223, the problem was same.

 

A 

The AD623 and AD8223 have trimmed resistors in the IC. When it is stressed, it
can act like a strain gauge. So when you twist one way, the AD623 strains in
one direction and outputs an error voltage. If you stress it the other way, it
will strain in the other direction and output a negative error voltage. 8mV is
high. If you remove the gain resistor, i.e use G=1, is the error as large?

We call this problem package and board stress. When the package or board
stresses the die, it strains the laser trimmed resistors on the IC causing an
error. We laser trimmed the resistors to be close to perfect. When we put it in
the package, it gets stressed and we end up with CMR of 70dB (or 80dB for the
AD8221). When the board stresses the part, the IC is stressed even more and we
get more CMR error and some offset error.

Larger packages have less stress. The SOIC is better than the MSOP package. The
DIP is even better.
  • ad623
  • Share
  • History
  • More
  • Cancel
Comments
Anonymous
Related
 
社交网络
快速链接
  • 关于ADI
  • Partners
  • 模拟对话
  • 职业
  • 联系我们
  • 投资信息
  • 新闻中心
  • 质量和可靠性
  • 办事处与代理商
  • Analog Garage
语言
  • English
  • 简体中文
  • 日本語
  • Руccкий
电子快讯

欲获得最新ADI产品、设计工具、培训与活动的相关新闻与文章,请从我们的在线快讯中选出您感兴趣的产品类别,每月或每季度都会发送至您的收件箱。

订阅
Switch to mobile view
Analog Logo
© 1995 - 2022 Analog Devices, Inc. All Rights Reserved 沪ICP备09046653号-1
  • ©
  • 1995 - 2022 Analog Devices, Inc. All Rights Reserved
  • 沪ICP备09046653号-1
  • 网站地图
  • 隐私和保密政策
  • 隐私设置
  • 使用条款
 
Social
Quick Links
  • About ADI
  • Partners
  • Analog Dialogue
  • Careers
  • Contact us
  • Investor Relations
  • News Room
  • Quality & Reliability
  • Sales & Distribution
  • Analog Garage
Languages
  • English
  • 简体中文
  • 日本語
  • Руccкий
Newsletters

Interested in the latest news and articles about ADI products, design tools, training and events? Choose from one of our 12 newsletters that match your product area of interest, delivered monthly or quarterly to your inbox.

Sign Up
Switch to mobile view
Analog Logo
© 1995 - 2022 Analog Devices, Inc. All Rights Reserved 沪ICP备09046653号-1
  • ©
  • 1995 - 2022 Analog Devices, Inc. All Rights Reserved
  • 沪ICP备09046653号-1
  • Sitemap
  • Privacy & Security
  • Privacy Settings
  • Terms of use
EngineerZone Uses cookies to ensure you get the best experience in our community. For more information on cookies, please read our Privacy & Security Statement.