Analog.com Analog Dialogue Wiki 简体中文
EngineerZone
EngineerZone
  • Log In
  • Site
  • Search
  • User
  • Support

    Popular Forums

    • RF and Microwave
    • Power Management
    • Video
    • FPGA Reference Designs
    • Precision ADCs
    • Linux Software Drivers
    • SigmaDSP Processors & SigmaStudio Dev. Tool

    Product Forums

    • A2B
    • Amplifiers
    • Analog Microcontrollers
    • Clock and Timing
    • Data Converters
    • Direct Digital Synthesis (DDS)
    • Energy Monitoring and Metering
    • Interface and Isolation
    • MEMS Inertial Sensors
    • Processors and DSP
    • Switches/Multiplexers
    • Temperature Sensors
    • Voltage References
    View All

    Application Forums

    • Audio
    • Automated Test Equipment (ATE)
    • Condition-Based Monitoring
    • Depth, Perception & Ranging Technologies
    • Embedded Vision Sensing Library
    • Motor Control Hardware Platforms
    • Optical Sensing
    • Precision Technology Signal Chains Library
    • Video
    • Wireless Sensor Networks Reference Library

    Design Center Forums

    • ACE Evaluation Software
    • ADEF System Platforms
    • Design Tools and Calculators
    • FPGA Reference Designs
    • Linux Software Drivers
    • Microcontroller no-OS Drivers
    • Reference Designs
    • Signal Chain Power (SCP)
    • Software Interface Tools
    • System Demonstration Platform (SDP) Support
  • Learn

    Highlighted Webinar

    Multidimensional Simulations of Beamformers and other RF Integrated Circuits in Keysight SystemVue

    Recent Discussions

    • Issue running built programs on Pluto
    • Activity: Simple Op Amps, For ADALM1000 Fig. 1.3 Buffering example
    • ADALM-PLUTO [NETWORK] vs [USB_ETHERNET]
    • Using buffer size different from 2**n
    • ADALM1000 Pixelpulse feature Source Voltage / Measure Current explanation

    Places

    • ADI Education Home
    • ADI Education China
    • ADI Education India
    • ADI Education Philippines
    • StudentZone (Analog Dialogue)
    • Virtual Classroom

    Latest Webinars

    • Multidimensional Simulations of Beamformers and other RF Integrated Circuits in Keysight SystemVue
    • Improve Smart Building Energy Efficiency with Industrial Ethernet Controlled Air Conditioning (HVAC) Systems
    • Sustainable Motion Control Solutions for High Performance Servo Drives
    • Audio Design Solutions for Augmented and Virtual Reality (AR/VR) Glasses
    • Robust Industrial Motor Encoder Signal Chain Solutions
    View All Webinars
  • Community Hub

    Challenge Yourself!

      KCC's quizzes AQQ235 about a bipolar common emitter amplifier - a kind proposal from our colleague Martin Walker
    View All

    Places

    • Community Help
    • Logic Lounge

    Resources

    • EZ Code of Conduct
    • Getting Started Guide
    • ADI: Words Matter
    • Community Help Videos
    View All
  • Blogs

    Highlighted Blogs

    Empowering Surveillance Cameras To Capture A Scene Without Being Heard

     

    Mastering The Metrics Makes Specifying Encoders Simpler

    Latest Blogs

    • Understanding Secret Key Cryptography Without Formulas
    • 3 Reasons Why IO-Link is Changing Smart Factory Decision Making
    • EMC Mitigation: The Finer Points of Ferrite Beads
    • Introducing an X Band Phased Array Exploration Platform – the “Phaser”!
    • How to Start with a Solution – Interactive Signal Chains
    Read All Blogs

    ADI Blogs

    • EZ Spotlight
    • The Engineering Mind
  • Partners

    Electronic Design Services - PartnerZone

    • Boston Engineering
    • Calian, Advanced Technologies
    • Colorado Engineering Inc. (DBA CAES AT&E)
    • Clockworks Signal Processing
    • Epiq Solutions
    • Fidus
    • PalmSens
    • Richardson RFPD
    • Tri-Star Design, Inc.
    • VadaTech
    • Vanteon
    • X-Microwave
    View All
Amplifiers
Amplifiers
Documents AD8551 at 2.5V supply (a bit outside of spec)
  • Forums
  • Video/Images
  • Members
  • Tags
  • More
  • Cancel
  • +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
  • +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
    • AD8551 at 2.5V supply (a bit outside of spec)
    • AD8551 / AD8552 / AD8554: typo in datasheet Rev D figure 68
    • AD8551_figure 60 gain calculation
  • +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
  • +Precision Technology Learning Modules

AD8551 at 2.5V supply (a bit outside of spec)

Q 

we are manufacturer of high-end relative humidity transmitters and relative
humidity calibrators. We want to
redesign an existing application and are looking at designing in the AD8551.
The power supply of the AD8551 application is only 2.5Vdc (using a voltage
reference). The datasheet sets the minimum power supply voltage at 2.7Vdc. What
are the consequences for using the Ad8551 at 2.5V in terms of power
dissipation, THD, offset, output swing, noise, etc?

 

A 

This kind of question arises frequently, where customers want to use the part
just a little bit outside the specification. The answer is always the same:
since the part is only being used a little outside the specifications it is not
likely that the performance will change a lot for most devices. However, the
parts have not been production tested at this supply voltage and the
specifications are not guaranteed so the customer is on their own if problems
arise. You could reasonably expect some devices to work with no problems while
other devices show a degredation in performance. We will never be able to tell
the customer that it is "perfectly okay" to use a 2.5V power supply; if it was
okay at 2.5V then we would have written that in the datasheet. However, may
possibly be able to say which parameters will be degraded and whether it is
possible that some devices won't work at all.

What does rail to rail mean?
For the input signals to the amplifier, the common mode can be anywhere between
0V and Vs. This is guaranteed.

For output voltages, the amplifier is guaranteed to reach within a few mV of
the supply rail, subject to the loading and temperature conditions which are
given on page 3 of the datasheet.

The exact amount of headroom which you need to leave depends on the structure
of the input and output stages of the amplifier. It is not correct to say that
one should not exceed Vrail - 1V. This limitation completely depends on the
kind of amplifier. Some amplifiers require up to 3V headroom from both rails
while others allow you to apply a voltage several 100mV beyond the rails. In
this case the input can go all the way to the rails while the output can come
within a few mV of the rails as long as you don't draw too much current.
  • ad8551
  • Share
  • History
  • More
  • Cancel
Related
Recommended
Social
Quick Links
  • About ADI
  • ADI Signals+
  • Analog Dialogue
  • Careers
  • Contact us
  • Investor Relations
  • News Room
  • Quality & Reliability
  • Sales & Distribution
  • Incubators
Languages
  • English
  • 简体中文
  • 日本語
Newsletter

Interested in the latest news and articles about ADI products, design tools, training and events? Subscribe today!

Sign Up
Analog Logo
©1995 - 2023 Analog Devices, Inc. All Rights Reserved
沪ICP备09046653号-1
  • Sitemap
  • Legal
  • Privacy & Security
  • Privacy Settings
EngineerZone Uses cookies to ensure you get the best experience in our community. For more information on cookies, please read our Privacy & Security Statement.