ZHCS065G March   2011  – January 2024 DAC3482

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Electrical Characteristics – DC Specifications
    6. 5.6  Electrical Characteristics – Digital Specifications
    7. 5.7  Electrical Characteristics – AC Specifications
    8. 5.8  Electrical Characteristics - Phase-Locked Loop Specifications
    9. 5.9  Timing Requirements - Digital Specifications
    10. 5.10 Switching Characteristics – AC Specifications
    11. 5.11 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Serial Interface
      2. 6.3.2  Data Interface
        1. 6.3.2.1 Word-Wide Format
        2. 6.3.2.2 Byte-Wide Format
      3. 6.3.3  Input FIFO
      4. 6.3.4  FIFO Modes of Operation
        1. 6.3.4.1 Dual Sync Source Mode
        2. 6.3.4.2 Single Sync Source Mode
        3. 6.3.4.3 Bypass Mode
      5. 6.3.5  Clocking Modes
        1. 6.3.5.1 PLL Bypass Mode
        2. 6.3.5.2 PLL Mode
      6. 6.3.6  FIR Filters
      7. 6.3.7  Complex Signal Mixer
        1. 6.3.7.1 Full Complex Mixer
        2. 6.3.7.2 Coarse Complex Mixer
        3. 6.3.7.3 Mixer Gain
        4. 6.3.7.4 Real Channel Upconversion
      8. 6.3.8  Quadrature Modulation Correction (QMC)
        1. 6.3.8.1 Gain and Phase Correction
        2. 6.3.8.2 Offset Correction
        3. 6.3.8.3 Group Delay Correction
      9. 6.3.9  Temperature Sensor
      10. 6.3.10 Data Pattern Checker
      11. 6.3.11 Parity Check Test
        1. 6.3.11.1 Word-by-Word Parity
        2. 6.3.11.2 Block Parity
      12. 6.3.12 DAC3482 Alarm Monitoring
      13. 6.3.13 LVPECL Inputs
      14. 6.3.14 LVDS Inputs
      15. 6.3.15 Unused LVDS Port Termination
      16. 6.3.16 CMOS Digital Inputs
      17. 6.3.17 Reference Operation
      18. 6.3.18 DAC Transfer Function
      19. 6.3.19 Analog Current Outputs
    4. 6.4 Device Functional Modes
      1. 6.4.1 Multi-Device Synchronization
        1. 6.4.1.1 Multi-Device Synchronization: PLL Bypassed with Dual Sync Sources Mode
        2. 6.4.1.2 Multi-Device Synchronization: PLL Enabled with Dual Sync Sources Mode
        3. 6.4.1.3 Multi-Device Operation: Single Sync Source Mode
    5. 6.5 Programming
      1. 6.5.1 Power-Up Sequence
      2. 6.5.2 Example Start-Up Routine
        1. 6.5.2.1 Device Configuration
        2. 6.5.2.2 PLL Configuration
        3. 6.5.2.3 NCO Configuration
        4. 6.5.2.4 Example Start-Up Sequence
    6. 6.6 Register Map
      1. 6.6.1 Register Descriptions
        1. 6.6.1.1  Register Name: config0 – Address: 0x00, Default: 0x049C
        2. 6.6.1.2  Register Name: config1 – Address: 0x01, Default: 0x050E
        3. 6.6.1.3  Register Name: config2 – Address: 0x02, Default: 0x7000
        4. 6.6.1.4  Register Name: config3 – Address: 0x03, Default: 0xF000
        5. 6.6.1.5  Register Name: config4 – Address: 0x04, Default: No RESET Value (WRITE TO CLEAR)
        6. 6.6.1.6  Register Name: config5 – Address: 0x05, Default: Setup and Power-Up Conditions Dependent (WRITE TO CLEAR)
        7. 6.6.1.7  Register Name: config6 – Address: 0x06, Default: No RESET Value (READ ONLY)
        8. 6.6.1.8  Register Name: config7 – Address: 0x07, Default: 0xFFFF
        9. 6.6.1.9  Register Name: config8 – Address: 0x08, Default: 0x0000 (CAUSES AUTO-SYNC)
        10. 6.6.1.10 Register Name: config9 – Address: 0x09, Default: 0x8000
        11. 6.6.1.11 Register Name: config10 – Address: 0x0A, Default: 0x0000
        12. 6.6.1.12 Register Name: config11 – Address: 0x0B, Default: 0x0000
        13. 6.6.1.13 Register Name: config12 – Address: 0x0C, Default: 0x0400
        14. 6.6.1.14 Register Name: config13 – Address: 0x0D, Default: 0x0400
        15. 6.6.1.15 Register Name: config14 – Address: 0x0E, Default: 0x0400
        16. 6.6.1.16 Register Name: config15 – Address: 0x0F, Default: 0x0400
        17. 6.6.1.17 Register Name: config16 – Address: 0x10, Default: 0x0000 (CAUSES AUTO-SYNC)
        18. 6.6.1.18 Register Name: config17 – Address: 0x11, Default: 0x0000
        19. 6.6.1.19 Register Name: config18 – Address: 0x12, Default: 0x0000 (CAUSES AUTO-SYNC)
        20. 6.6.1.20 Register Name: config19 – Address: 0x13, Default: 0x0000
        21. 6.6.1.21 Register Name: config20 – Address: 0x14, Default: 0x0000
        22. 6.6.1.22 Register Name: config21 – Address: 0x15, Default: 0x0000
        23. 6.6.1.23 Register name: config22 – Address: 0x16, Default: 0x0000
        24. 6.6.1.24 Register Name: config23 – Address: 0x17, Default: 0x0000
        25. 6.6.1.25 Register Name: config24 – Address: 0x18, Default: NA
        26. 6.6.1.26 Register Name: config25 – Address: 0x19, Default: 0x0440
        27. 6.6.1.27 Register Name: config26 – Address: 0x1A, Default: 0x0020
        28. 6.6.1.28 Register Name: config27 – Address: 0x1B, Default: 0x0000
        29. 6.6.1.29 Register Name: config28 – Address: 0x1C, Default: 0x0000
        30. 6.6.1.30 Register Name: config29 – Address: 0x1D, Default: 0x0000
        31. 6.6.1.31 Register Name: config30 – Address: 0x1E, Default: 0x1111
        32. 6.6.1.32 Register Name: config31 – Address: 0x1F, Default: 0x1140
        33. 6.6.1.33 Register Name: config32 – Address: 0x20, Default: 0x2400
        34. 6.6.1.34 Register Name: config33 – Address: 0x21, Default: 0x0000
        35. 6.6.1.35 Register Name: config34 – Address: 0x22, Default: 0x1B1B
        36. 6.6.1.36 Register Name: config35 – Address: 0x23, Default: 0xFFFF
        37. 6.6.1.37 Register Name: config36 – Address: 0x24, Default: 0x0000
        38. 6.6.1.38 Register Name: config37 – Address: 0x25, Default: 0x7A7A
        39. 6.6.1.39 Register Name: config38 – Address: 0x26, Default: 0xB6B6
        40. 6.6.1.40 Register Name: config39 – Address: 0x27, Default: 0xEAEA
        41. 6.6.1.41 Register Name: config40 – Address: 0x28, Default: 0x4545
        42. 6.6.1.42 Register Name: config41 – Address: 0x29, Default: 0x1A1A
        43. 6.6.1.43 Register Name: config42 – Address: 0x2A, Default: 0x1616
        44. 6.6.1.44 Register Name: config43 – Address: 0x2B, Default: 0xAAAA
        45. 6.6.1.45 Register Name: config44 – Address: 0x2C, Default: 0xC6C6
        46. 6.6.1.46 Register Name: config45 – Address: 0x2D, Default: 0x0004
        47. 6.6.1.47 Register Name: config46 – Address: 0x2E, Default: 0x0000
        48. 6.6.1.48 Register Name: config47 – Address: 0x2F, Default: 0x0000
        49. 6.6.1.49 Register Name: config48 – Address: 0x30, Default: 0x0000
        50. 6.6.1.50 Register Name: version– Address: 0x7F, Default: 0x540C (READ ONLY)
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 IF Based LTE Transmitter
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Data Input Rate
          2. 7.2.1.2.2 Interpolation
          3. 7.2.1.2.3 LO Feedthrough and Sideband Correction
        3. 7.2.1.3 Application Curves
      2. 7.2.2 Direct Upconversion (Zero IF) LTE Transmitter
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
          1. 7.2.2.2.1 Data Input Rate
          2. 7.2.2.2.2 Interpolation
          3. 7.2.2.2.3 LO Feedthrough and Sideband Correction
        3. 7.2.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Examples
      3. 7.4.3 Assembly
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
        1. 8.1.1.1 Definition of Specifications
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 支持资源
    4. 8.4 Trademarks
    5. 8.5 静电放电警告
    6. 8.6 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Clarifications for DAC3482 Power Supply and Phase-Locked Loop Specification

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7.1 Application Information

The DAC3482 is a dual 16-bit DAC with max input data rate of up to 625MSPS per DAC and max DAC update rate of 1.25GSPS after the final, selectable interpolation stages. With build-in interpolation filter of 2x, 4x, 8x, and 16x options, the lower input data rate can be interpolated all the way to 1.25GSPS. This allows the DAC to update the samples at higher rate, and pushes the DAC images further away to relax anti-image filer specification due to the increased Nyquist bandwidth. With integrated coarse and fine mixers, baseband signal can be upconverted to an intermediate frequency (IF) signal between the baseband processor and post-DAC analog signal chains.

The DAC can output baseband or IF when connected to post-DAC analog signals chain components such as transformers or IF amplifiers. When used in conjunction with TI RF quadrature modulator such as the TRF3705, the DAC and RF modulator can function as a set of baseband or IF upconverter. With integrated QMC circuits, the LO offset and the sideband artifacts can be properly corrected in the direct up-conversion applications. The DAC3482 provides the bandwidth, performance, small footprint, and lower power consumption needed for multi-mode 2G/3G/4G cellular base stations to migrate to more advanced technologies, such as LTE-Advanced and carrier aggregation on multiple antennas.