JAJSFK8C June   2018  – November 2018 LMX2615-SP

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      概略回路図
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
      1.      CQFP Package (QFN) Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Reference Oscillator Input
      2. 7.3.2  Reference Path
        1. 7.3.2.1 OSCin Doubler (OSC_2X)
        2. 7.3.2.2 Pre-R Divider (PLL_R_PRE)
        3. 7.3.2.3 Post-R Divider (PLL_R)
      3. 7.3.3  State Machine Clock
      4. 7.3.4  PLL Phase Detector and Charge Pump
      5. 7.3.5  N Divider and Fractional Circuitry
      6. 7.3.6  MUXout Pin
        1. 7.3.6.1 Serial data output for readback
        2. 7.3.6.2 Lock detect indicator set as type “VCOCal”
        3. 7.3.6.3 Lock detect indicator set as type “Vtune and VCOCal”
      7. 7.3.7  VCO (Voltage Controlled Oscillator)
        1. 7.3.7.1 VCO Calibration
        2. 7.3.7.2 Watchdog Feature
        3. 7.3.7.3 RECAL Feature
        4. 7.3.7.4 Determining the VCO Gain
      8. 7.3.8  Channel Divider
      9. 7.3.9  Output Buffer
      10. 7.3.10 Powerdown Modes
      11. 7.3.11 Treatment of Unused Pins
      12. 7.3.12 Phase Synchronization
        1. 7.3.12.1 General Concept
        2. 7.3.12.2 Categories of Applications for SYNC
        3. 7.3.12.3 Procedure for Using SYNC
        4. 7.3.12.4 SYNC Input Pin
      13. 7.3.13 Phase Adjust
      14. 7.3.14 Fine Adjustments for Phase Adjust and Phase SYNC
      15. 7.3.15 SYSREF
        1. 7.3.15.1 Programmable Fields
        2. 7.3.15.2 Input and Output Pin Formats
          1. 7.3.15.2.1 SYSREF Output Format
        3. 7.3.15.3 Examples
        4. 7.3.15.4 SYSREF Procedure
      16. 7.3.16 Pin Modes
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1 Recommended Initial Power-Up Sequence
      2. 7.5.2 Recommended Sequence for Changing Frequencies
    6. 7.6 Register Maps
      1. 7.6.1 Register Map
        1. 7.6.1.1  R0 Register (Address = 0x0) [reset = X]
          1. Table 22. R0 Register Field Descriptions
        2. 7.6.1.2  R1 Register (Address = 0x1) [reset = 0x4]
          1. Table 23. R1 Register Field Descriptions
        3. 7.6.1.3  R8 Register (Address = 0x8) [reset = X]
          1. Table 24. R8 Register Field Descriptions
        4. 7.6.1.4  R9 Register (Address = 0x9) [reset = X]
          1. Table 25. R9 Register Field Descriptions
        5. 7.6.1.5  R11 Register (Address = 0xB) [reset = 0x10]
          1. Table 26. R11 Register Field Descriptions
        6. 7.6.1.6  R12 Register (Address = 0xC) [reset = 0x1]
          1. Table 27. R12 Register Field Descriptions
        7. 7.6.1.7  R14 Register (Address = 0xE) [reset = 0x70]
          1. Table 28. R14 Register Field Descriptions
        8. 7.6.1.8  R16 Register (Address = 0x10) [reset = 0x80]
          1. Table 29. R16 Register Field Descriptions
        9. 7.6.1.9  R19 Register (Address = 0x13) [reset = 0xB7]
          1. Table 30. R19 Register Field Descriptions
        10. 7.6.1.10 R20 Register (Address = 0x14) [reset = X]
          1. Table 31. R20 Register Field Descriptions
        11. 7.6.1.11 R31 Register (Address = 0x1F) [reset = X]
          1. Table 32. R31 Register Field Descriptions
        12. 7.6.1.12 R34 Register (Address = 0x22) [reset = 0x0]
          1. Table 33. R34 Register Field Descriptions
        13. 7.6.1.13 R36 Register (Address = 0x24) [reset = 0x46]
          1. Table 34. R36 Register Field Descriptions
        14. 7.6.1.14 R37 Register (Address = 0x25) [reset = 0x400]
          1. Table 35. R37 Register Field Descriptions
        15. 7.6.1.15 R38 Register (Address = 0x26) [reset = 0xFD51]
          1. Table 36. R38 Register Field Descriptions
        16. 7.6.1.16 R39 Register (Address = 0x27) [reset = 0xDA80]
          1. Table 37. R39 Register Field Descriptions
        17. 7.6.1.17 R40 Register (Address = 0x28) [reset = 0x0]
          1. Table 38. R40 Register Field Descriptions
        18. 7.6.1.18 R41 Register (Address = 0x29) [reset = 0x0]
          1. Table 39. R41 Register Field Descriptions
        19. 7.6.1.19 R42 Register (Address = 0x2A) [reset = 0x0]
          1. Table 40. R42 Register Field Descriptions
        20. 7.6.1.20 R43 Register (Address = 0x2B) [reset = 0x0]
          1. Table 41. R43 Register Field Descriptions
        21. 7.6.1.21 R44 Register (Address = 0x2C) [reset = 0x1FA3]
          1. Table 42. R44 Register Field Descriptions
        22. 7.6.1.22 R45 Register (Address = 0x2D) [reset = X]
          1. Table 43. R45 Register Field Descriptions
        23. 7.6.1.23 R46 Register (Address = 0x2E) [reset = 0x1]
          1. Table 44. R46 Register Field Descriptions
        24. 7.6.1.24 R58 Register (Address = 0x3A) [reset = X]
          1. Table 45. R58 Register Field Descriptions
        25. 7.6.1.25 R59 Register (Address = 0x3B) [reset = 0x1]
          1. Table 46. R59 Register Field Descriptions
        26. 7.6.1.26 R60 Register (Address = 0x3C) [reset = 0x9C4]
          1. Table 47. R60 Register Field Descriptions
        27. 7.6.1.27 R69 Register (Address = 0x45) [reset = 0x0]
          1. Table 48. R69 Register Field Descriptions
        28. 7.6.1.28 R70 Register (Address = 0x46) [reset = 0xC350]
          1. Table 49. R70 Register Field Descriptions
        29. 7.6.1.29 R71 Register (Address = 0x47) [reset = 0x80]
          1. Table 50. R71 Register Field Descriptions
        30. 7.6.1.30 R72 Register (Address = 0x48) [reset = 0x1]
          1. Table 51. R72 Register Field Descriptions
        31. 7.6.1.31 R73 Register (Address = 0x49) [reset = 0x3F]
          1. Table 52. R73 Register Field Descriptions
        32. 7.6.1.32 R74 Register (Address = 0x4A) [reset = 0x0]
          1. Table 53. R74 Register Field Descriptions
        33. 7.6.1.33 R75 Register (Address = 0x4B) [reset = 0x0]
          1. Table 54. R75 Register Field Descriptions
        34. 7.6.1.34 R110 Register (Address = 0x6E) [reset = 0x0]
          1. Table 55. R110 Register Field Descriptions
        35. 7.6.1.35 R111 Register (Address = 0x6F) [reset = 0x0]
          1. Table 56. R111 Register Field Descriptions
        36. 7.6.1.36 R112 Register (Address = 0x70) [reset = 0x0]
          1. Table 57. R112 Register Field Descriptions
        37. 7.6.1.37 R113 Register (Address = 0x71) [reset = 0x0]
          1. Table 58. R113 Register Field Descriptions
        38. 7.6.1.38 R114 Register (Address = 0x72) [reset = 0x26F]
          1. Table 59. R114 Register Field Descriptions
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 OSCin Configuration
      2. 8.1.2 OSCin Slew Rate
      3. 8.1.3 RF Output Buffer Power Control
      4. 8.1.4 RF Output Buffer Pullup
        1. 8.1.4.1 Resistor Pullup
        2. 8.1.4.2 Inductor Pullup
        3. 8.1.4.3 Combination Pullup
      5. 8.1.5 RF Output Treatment for the Complimentary Side
        1. 8.1.5.1 Single-Ended Termination of Unused Output
        2. 8.1.5.2 Differential Termination
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Footprint Example on PCB Layout
    4. 10.4 Radiation Environments
      1. 10.4.1 Total Ionizing Dose
      2. 10.4.2 Single Event Effect
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 デバイス・サポート
      1. 11.1.1 デベロッパー・ネットワークの製品に関する免責事項
      2. 11.1.2 開発サポート
    2. 11.2 ドキュメントのサポート
      1. 11.2.1 関連資料
    3. 11.3 商標
    4. 11.4 静電気放電に関する注意事項
    5. 11.5 Glossary
  12. 12メカニカル、パッケージ、および注文情報
    1. 12.1 エンジニアリング・サンプル
    2. 12.2 パッケージ・メカニカル情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10.1 Layout Guidelines

In general, the layout guidelines are similar to most other PLL devices. Here are some specific guidelines.

  • GND pins may be routed on the package back to the DAP.
  • The OSCin pins, these are internally biased and must be AC coupled.
  • If not used, the SysRefReq may be grounded to the DAP.
  • For optimal VCO phase noise in the 200kHz - 1 MHz range, it is ideal that the capacitor closest to the Vtune pin be at least 3.3 nF. As requiring this larger capacitor may restrict the loop bandwidth, this value can be reduced (to say 1.5 nF) at the expense of VCO phase noise.
  • For the outputs, keep the pullup component as close as possible to the pin and use the same component on each side of the differential pair.
  • If a single-ended output is needed, the other side must have the same loading and pullup. However, the routing for the used side can be optimized by routing the complementary side through a via to the other side of the board. On this side, use the same pullup and make the load look equivalent to the side that is used.
  • Ensure DAP on device is well-grounded with many vias, preferably copper filled.
  • Have a thermal pad that is as large as the LMX2615 exposed pad. Add vias to the thermal pad to maximize thermal performance.
  • Use a low loss dielectric material, such as Rogers 4350B, for optimal output power.