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
    • Motor Control Hardware Platforms
    • Optical Sensing
    • Precision Technology Signal Chains
    • 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

    Robust Industrial Motor Encoder Signal Chain Solutions

    Recent Discussions

    • About the values of CurV1,2 displayed in the cursors frame of scopy.
    • Purpose of "Load" in Scopy signal generator configuration GUI
    • about the transient response experiment example of RL Circuit using adalm2000
    • Using ADALM1000 AIN and CHA as kelvin connection
    • I2C communication with ADALM2OOO Through Scopy

    Places

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

    Latest Webinars

    • Robust Industrial Motor Encoder Signal Chain Solutions
    • Precision Low Power Measurement Solutions for Intelligent Edge
    • Advantages of Integrating Digital Power System Management (DPSM) into your Design
    • Optimizing GaN and GaAs RF Amplifier Performance Using Novel Biasing Techniques
    • Improving Switch-Mode Power Supplies Using Noise Cancelling Technology
    View All Webinars
  • Community Hub

    Challenge Yourself!

      KCC's Quizzes AQQ230 about a clock and angle puzzle
    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

    Using Python To Control The Pluto Radio And Plot Data

     

    Resistance is NOT Futile

    Latest Blogs

    • What is The Continuity of Engineering?
    • Move Over Sensors: Actuators Are Entering The Smart Factory Stage
    • What To Call A Non-Compliant Item
    • How to Construct a Beamformer with the ADALM-PLUTO
    • Customize Your EZ Experience
    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
Precision ADCs
  • Data Converters
Precision ADCs
Documents AD7712: Master clock
  • Forums
  • File Uploads
  • FAQs/Docs
  • Members
  • Tags
  • More
  • Cancel
  • +Documents
  • +General: FAQ
  • +AD1139: FAQ
  • +AD1556: FAQ
  • +AD1580: FAQ
  • +AD1582: FAQ
  • +AD2S1200: FAQ
  • +AD2S1205: FAQ
  • +AD2S1210: FAQ
  • +AD2S75: FAQ
  • +AD2S80: FAQ
  • +AD2S80A: FAQ
  • +AD2S82A: FAQ
  • +AD2S83: FAQ
  • +AD2S90: FAQ
  • +AD2S99: FAQ
  • +AD4110-1: FAQ
  • +AD411x: FAQ
  • +AD5940: FAQ
  • +AD598: FAQ
  • +AD650: FAQ
  • +AD652: FAQ
  • +AD654: FAQ
  • +AD7091: FAQ
  • +AD7091r: FAQ
  • +AD711: FAQ
  • +AD7124-4: FAQ
  • +AD7124-8: FAQ
  • +AD7134: FAQ
  • +AD713: FAQ
  • +AD7142: FAQ
  • +AD7147: FAQ
  • +AD7148: FAQ
  • +AD7150: FAQ
  • +AD7151: FAQ
  • +AD7175-2: FAQ
  • +AD7176-2: FAQ
  • +AD7176: FAQ
  • +AD717x: FAQ
  • +AD7190: FAQ
  • +AD7192: FAQ
  • +AD7193: FAQ
  • +AD7195: FAQ
  • +AD719x: FAQ
  • +AD7265: FAQ
  • +AD7266: FAQ
  • +AD7280: FAQ
  • +AD7291: FAQ
  • +AD7298: FAQ
  • +AD7305: FAQ
  • +AD7321: FAQ
  • +AD7323: FAQ
  • +AD7328: FAQ
  • +AD7366-5: FAQ
  • +AD7367: FAQ
  • +AD736ARZ: FAQ
  • +AD737: FAQ
  • +AD7380 : FAQ
  • +AD7398: FAQ
  • +AD7400A: FAQ
  • +AD7401: FAQ
  • +AD7403: FAQ
  • +AD74111: FAQ
  • +AD7415: FAQ
  • +AD7416: FAQ
  • +AD7417: FAQ
  • +AD7418: FAQ
  • +AD7450: FAQ
  • +AD7475: FAQ
  • +AD7484: FAQ
  • +AD7490: FAQ
  • +AD7492: FAQ
  • +AD75019: FAQ
  • +AD7503: FAQ
  • +AD7541A: FAQ
  • +AD7546: FAQ
  • +AD7547: FAQ
  • +AD7568: FAQ
  • +AD7578: FAQ
  • +AD7606-4: FAQ
  • +AD7606: FAQ
  • +AD7606B: FAQ
  • +AD7606C: FAQ
  • +AD7608: FAQ
  • +AD7616 FAQ
  • +AD7616-P: FAQ
  • +AD7621: FAQ
  • +AD7625: FAQ
  • +AD7626: FAQ
  • +AD7631: FAQ
  • +AD7653: FAQ
  • +AD7654: FAQ
  • +AD7655: FAQ
  • +AD7656: FAQ
  • +AD7657-1: FAQ
  • +AD7663: FAQ
  • +AD7674: FAQ
  • +AD7675: FAQ
  • +AD7678: FAQ
  • +AD7682: FAQ
  • +AD7683: FAQ
  • +AD7684: FAQ
  • +AD7685: FAQ
  • +AD7688: FAQ
  • +AD7689: FAQ
  • +AD7690: FAQ
  • +AD7691: FAQ
  • +AD7705: FAQ
  • +AD7706: FAQ
  • +AD7707: FAQ
  • +AD7708: FAQ
  • +AD7709: FAQ
  • +AD7710: FAQ
  • +AD7711A: FAQ
  • -AD7712: FAQ
    • AD7712: power supply
    • AD7712: Master clock
    • AD7712: Noise spectral density
    • AD7712: Variation of input impedance over temperature
    • In our application, some AD7712 use System Offset Calibration initiated, after the power-up, together with the device configuration, by the means of a single writing of the Configuration Register (0x8297A1)
  • +AD7713: FAQ
  • +AD7714: FAQ
  • +AD7714YN: FAQ
  • +AD7715: FAQ
  • +AD7716: FAQ
  • +AD7718: FAQ
  • +AD7719: FAQ
  • +AD7720: FAQ
  • +AD7722: FAQ
  • +AD7725: FAQ
  • +AD7730: FAQ
  • +AD7731: FAQ
  • +AD7732: FAQ
  • +AD7738: FAQ
  • +AD7740: FAQ
  • +AD7741: FAQ
  • +AD7745: FAQ
  • +AD7746: FAQ
  • +AD7747: FAQ
  • +AD7760: FAQ
  • +AD7763: FAQ
  • +AD7766: FAQ
  • +AD7768: FAQ
  • +AD777x: FAQ
  • +AD7780: FAQ
  • +AD7785: FAQ
  • +AD7787: FAQ
  • +AD7788: FAQ
  • +AD7790: FAQ
  • +AD7792: FAQ
  • +AD7793: FAQ
  • +AD7794: FAQ
  • +AD7795: FAQ
  • +AD7798: FAQ
  • +AD7799: FAQ
  • +AD7805: FAQ
  • +AD7808: FAQ
  • +AD7809: FAQ
  • +AD780: FAQ
  • +AD7811: FAQ
  • +AD7812: FAQ
  • +AD7817: FAQ
  • +AD7819: FAQ
  • +AD7821: FAQ
  • +AD7825: FAQ
  • +AD7829: FAQ
  • +AD7835: FAQ
  • +AD7849: FAQ
  • +AD7851: FAQ
  • +AD7854: FAQ
  • +AD7856: FAQ
  • +AD7858: FAQ
  • +AD7859: FAQ
  • +AD7864: FAQ
  • +AD7865 : FAQ
  • +AD7872: FAQ
  • +AD7874: FAQ
  • +AD7879: FAQ
  • +AD7887: FAQ
  • +AD7888: FAQ
  • +AD7891-1: FAQ
  • +AD7891: FAQ
  • +AD7893-2: FAQ
  • +AD7895: FAQ
  • +AD7896: FAQ
  • +AD7899: FAQ
  • +AD7912: FAQ
  • +AD7921: FAQ
  • +AD7924: FAQ
  • +AD7927: FAQ
  • +AD7938: FAQ
  • +AD7942: FAQ
  • +AD7949: FAQ
  • +AD7960: FAQ
  • +AD7961: FAQ
  • +AD797: FAQ
  • +AD7980: FAQ
  • +AD7982: FAQ
  • +AD7984: FAQ
  • +AD7986: FAQ
  • +AD7988-1: FAQ
  • +AD7993: FAQ
  • +AD7994: FAQ
  • +AD7997: FAQ
  • +AD7998: FAQ
  • +ADA2200: FAQ
  • +ADAS1000: FAQ
  • +ADAS3022: FAQ
  • +ADAS3023: FAQ
  • +ADC: FAQ
  • +ADVFC32: FAQ
  • +EVAL-AD7719-EB: FAQ
  • +EVAL-ADAS3022EDZ: FAQ
  • +RDC1740: FAQ
  • +AD4116: FAQ
  • AD7398 SPI Voltage vs VCC
  • +DC590, DC2026, QuikEval: FAQs
  • +Legacy LTC - Sigma Delta ADCs FAQ
  • +Precision Technology Learning Modules
  • Programming FMC FRU ID EEPROM on Linux

AD7712: Master clock

Q 

I would like to use sigma-delta converters for a
multi-channel (48) acquisition application. There
is a stringent need for synchronicity between
each converter in our application.

I am interested in using AD7712 converters since
it features multi-channel acquisition capabilities:
the SYNC pin can be turned low "to reset the
nodes of the digital filter" (I quote the
datasheet), and consequently to synchronise
number of ADCs.

Assuming that we drive the bunch of ADCs with a
single 10 MHz clock, and that we synchronize the
ADCs with a single SYNC pulse signal, what are
the typical and maximum skews between the DRDY
signals one can expect: within a 10 MHz clock
period, a few micro-seconds, more ?

 

A 

You are correct, if you drive multiple AD7712s from the same master clock ( and
ensure the master clock is properly distributed to avoid clock skew between
ADCs) you can use the SYNC pin or SYCN bit to syncronise multiple ADCs. This
will ensure that sampling of two or more sycnronised ADCs happens
simultaneously (within 100ns) and that the output DRDY occurs at the same time
for all devices.

Do note that the AD7712 is a sigma delta device and therefore there is a
latency of 3 conversion periods between releasing the SYNC pin and the first
conversion result being available. Similarly, if you apply a step change to the
input of the AD7712, there is a latency of 3 conversion periods before the
result is valid. See note on page 10 under "Filter Section"
The AD7712 is a mature product and w have since moved to our third generation
of sigma delta products (lower power, lower cost, more functionality). For new
designs I would recommend the AD7705/06 for low cost 16bit measurements, the
AD7707 if you require a high level input and the AD7714 for 24bit resolution.

In addition, if you do not require simultaneous sampling of all 48 channels,
consider the AD7718 and AD7708 which have an on chip 8/10channel MUX.

  • ad7712
  • 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.