SNAS449F February   2008  – May 2017 DAC081C081 , DAC081C085

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1. 3.1 Block Diagram
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 AC and Timing Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 DAC Section
      2. 8.3.2 Output Amplifier
      3. 8.3.3 Reference Voltage
      4. 8.3.4 Power-On Reset
      5. 8.3.5 Simultaneous Reset
      6. 8.3.6 Additional Timing Information: toutz
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Down Modes
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
      2. 8.5.2 Basic I2C Protocol
      3. 8.5.3 Standard-Fast Mode
      4. 8.5.4 High-Speed (Hs) Mode
      5. 8.5.5 I2C Slave (Hardware) Address
      6. 8.5.6 Writing to the DAC Register
      7. 8.5.7 Reading from the DAC Register
    6. 8.6 Registers
      1. 8.6.1 DAC Register
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Bipolar Operation
      2. 9.1.2 DSP/Microprocessor Interfacing
        1. 9.1.2.1 Interfacing to the 2-Wire Bus
        2. 9.1.2.2 Interfacing to a Hs-mode Bus
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
    1. 10.1 Using References as Power Supplies
      1. 10.1.1 LM4132
      2. 10.1.2 LM4050
      3. 10.1.3 LP3985
      4. 10.1.4 LP2980
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
      2. 12.1.2 Device Nomenclature
        1. 12.1.2.1 Specification Definitions
    2. 12.2 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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12 Device and Documentation Support

12.1 Device Support

12.1.1 Development Support

For development support, see the following:

  • 12-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface, DAC121C081
  • 12-Bit Micro Pwr DAC w/ I2C-Compatible Interface & External Reference, DAC121C085
  • 10-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface, DAC101C081
  • 10-Bit Micro Pwr DAC w/ I2C-Compatible Interface & External Reference, DAC101C085

12.1.2 Device Nomenclature

12.1.2.1 Specification Definitions

    DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB, which is VREF / 256 = VA / 256.
    DIGITAL FEEDTHROUGH is a measure of the energy injected into the analog output of the DAC from the digital inputs when the DAC output is not updated. It is measured with a full-scale code change on the data bus.
    FULL-SCALE ERROR is the difference between the actual output voltage with a full scale code (FFFh) loaded into the DAC and the value of VA x 255 / 256.
    GAIN ERROR is the deviation from the ideal slope of the transfer function. It can be calculated from Zero and Full-Scale Errors as GE = FSE - ZE, where GE is Gain error, FSE is Full-Scale Error and ZE is Zero Error.
    GLITCH IMPULSEis the energy injected into the analog output when the input code to the DAC register changes. It is specified as the area of the glitch in nanovolt-seconds.
    INTEGRAL NON-LINEARITY (INL)is a measure of the deviation of each individual code from a straight line through the input to output transfer function. The deviation of any given code from this straight line is measured from the center of that code value. The end point method is used. INL for this product is specified over a limited range, per the Electrical Tables.
    LEAST SIGNIFICANT BIT (LSB) is the bit that has the smallest value or weight of all bits in a word. This value is LSB = VREF / 2n where VREF is the supply voltage for this product, and "n" is the DAC resolution in bits, which is 8 for the DAC081C081.
    MAXIMUM LOAD CAPACITANCEis the maximum capacitance that can be driven by the DAC with output stability maintained.
    MONOTONICITYis the condition of being monotonic, where the DAC has an output that never decreases when the input code increases.
    MOST SIGNIFICANT BIT (MSB) is the bit that has the largest value or weight of all bits in a word. Its value is 1/2 of VA.
    MULTIPLYING BANDWIDTH is the frequency at which the output amplitude falls 3dB below the input sine wave on VREFIN with a full-scale code loaded into the DAC.
    POWER EFFICIENCY is the ratio of the output current to the total supply current. The output current comes from the power supply. The difference between the supply and output currents is the power consumed by the device without a load.
    SETTLING TIME is the time for the output to settle to within 1/2 LSB of the final value after the input code is updated.
    TOTAL HARMONIC DISTORTION (THD)is the measure of the harmonics present at the output of the DACs with an ideal sine wave applied to VREFIN. THD is measured in dB.
    WAKE-UP TIME is the time for the output to exit power-down mode. This time is measured from the rising edge of SCL during the ACK bit of the lower data byte to the time the output voltage deviates from the power-down voltage of 0V.
    ZERO CODE ERROR is the output error, or voltage, present at the DAC output after a code of 000h has been entered.

12.2 Related Links

The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy.

Table 5. Related Links

PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY
DAC081C081 Click here Click here Click here Click here Click here
DAC081C085 Click here Click here Click here Click here Click here

12.3 Community Resources

The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use.

    TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers.
    Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support.

12.4 Trademarks

E2E is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

12.5 Electrostatic Discharge Caution

esds-image

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

12.6 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.