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
    • 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

    Recent Discussions

    • Pluto + GNURADIO frequency change
    • Pluto SDR
    • pluto sdr pyadi-iio continous iq recording
    • attribute error
    • gps-sdr-sim is not working with my ADALM-PLUTO

    Places

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

    Latest Webinars

    • Optimizing GaN and GaAs RF Amplifier Performance Using Novel Biasing Techniques
    • Webinar Improving Switch-Mode Power Supplies Using Noise Cancelling Technology
    • Webinar Accelerate Your Design With a 2 to 24 GHz Wideband Transceiver Reference Design
    • How to Design an Optimized Motion Control System for Intelligent Edge Based Surveillance Camera
    • How to Enhance High Precision Current Sensing Systems
    View All
  • Community Hub

    Challenge Yourself!

      KCC's Quizzes: Buffers and Fan Out
    View All

    Places

    • Community Help
    • Logic Lounge

    Resources

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

     

    How To Design Fieldbus Agnostic Smart Factory Sensors

     

    You Passed EMC Testing… But Wait, Is There More?

    Latest Blogs

    • The 5 Things You Need to Know about RF Matching Networks
    • Does Reliability Prediction Uncertainty Justify Mandating Two Channel Safety?
    • An Inside Look at 2022
    • Meet the Person Behind the Quizzes
    • Updates Required: Why Newer is Better
    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
8052 Core Products
  • Analog Microcontrollers
8052 Core Products
Documents How to remove DAC zero Code error
  • Q&A
  • Docs/FAQs
  • Members
  • Tags
  • More
  • Cancel
  • Documents
  • -ADuC812: FAQ
    • How to remove DAC zero Code error
    • ADUC812: Battery lifetime
    • ADuC812: Dealing with the interface I2C
    • Value of sample rate more higher that 200Ks are dangerous then customer never must use this value ?
    • ADuC812: enter serial download mode
    • ADuC812: Failure in restarting
    • ADUC812: Failure to Reset/Download
    • ADuC812: Flash reliability
    • ADuC812: glitches on the reset line
    • ADuC812: How to program external code space
    • ADuC812: latch-up
    • ADuC812: Measure ambient temperature
    • ADuC812: On Chip temperature sensor
    • ADuC812: Power down mode and choice of C compilers
    • ADuC812: Problems downloading to FLASH
    • ADuC812: PSEN pin
    • ADuC812: Reseting failure when downloading user program with WSD
    • ADuC812: serial interface
    • ADuC812: Status of the port on power-up
    • How do I migrate from ADuC812 to ADuC831 or ADu832?
  • +ADUC814: FAQ
  • +ADUC816: FAQ
  • +ADUC824: FAQ
  • +ADuC831: FAQ
  • +ADUC832: FAQ
  • +ADUC834: FAQ
  • +ADuC836: FAQ
  • +ADuC83x: FAQ
  • +ADUC841: FAQ
  • +ADuC842: FAQ
  • +ADUC845: FAQ
  • +ADuC847: FAQ
  • +ADUC848: FAQ
  • +ADuC84x: FAQ
  • +ADUC8xx: FAQ
  • +ADUCXX: FAQ

How to remove DAC zero Code error

Q 

The offset of the on-board DAC of the ADUC8XX is 2% (5mV) in the range of 2.5V.
This causes a problem at the customer because they have to set the DAC out to
0-Volts.  The FS is not very important. Do you know how they can set the DAC
out to ZERO ?

 

A 

It will not be possible to get zero volts out of the DAC. The DAC has an on
offset of +/-50mV max. If the offset is  positive, the output voltage for the
zero code will be roughly equal to the offset voltage (with allowances made for
the headroom of the output amplifier).  If the offset is negative, the output
amplifier will saturate to near zero for the zero code. There will be a
"dead-band" around zero where the first few codes after zero will not produce
any response at the output. The output voltage will remain at zero for the
first few codes and then rise when the input code is equivalent to the offset
voltage.

There is no way to determine whether offset will be positive or negative.

If the customer requires a bipolar, true zero output, he can level shift the
output using an opamp circuit. The enclosed circuit will convert the 0 to 2.5V
output from the DAC to a +/-2.5V signal. You can then use software to calibrate
out the offset error. Since you only need 0 to 2.5V output, you will lose one
bit of resolution but I would not expect this to be a problem as the relative
accuracy of the DAC is only +/-3LSB anyway.

  • aduc8xx
  • aduc812
  • aduc8x
  • Share
  • History
  • More
  • Cancel
Related
Recommended
 
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 - 2023 Analog Devices, Inc. All Rights Reserved 沪ICP备09046653号-1
  • ©
  • 1995 - 2023 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.