SNAS322C February   2006  – January 2016 LMX2487

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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
      1. 6.7.1 Sensitivity
      2. 6.7.2 FinRF Input Impedance
      3. 6.7.3 FinIF Input Impedance
      4. 6.7.4 OSCin Input Impedance
      5. 6.7.5 Currents
  7. 7 Parameter Measurement Information
    1. 7.1 Bench Test Set-Ups
      1. 7.1.1 Charge Pump Current Measurement Procedure
      2. 7.1.2 Charge Pump Current Specification Definitions
        1. 7.1.2.1 Charge Pump Output Current Variation vs Charge Pump Output Voltage
        2. 7.1.2.2 Charge Pump Output Current Variation vs Temperature
      3. 7.1.3 Sensitivity Measurement Procedure
      4. 7.1.4 Input Impedance Measurement Procedure
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 TCXO, Oscillator Buffer, and R Counter
      2. 8.3.2 Phase Detector
      3. 8.3.3 Charge Pump
      4. 8.3.4 Loop Filter
      5. 8.3.5 N Counters and High Frequency Input Pins
        1. 8.3.5.1 High Frequency Input Pins, FinRF and FinIF
        2. 8.3.5.2 Complementary High Frequency Pin, FinRF*
      6. 8.3.6 Digital Lock Detect Operation
      7. 8.3.7 Cycle Slip Reduction and Fastlock
        1. 8.3.7.1 Cycle Slip Reduction (CSR)
        2. 8.3.7.2 Fastlock
        3. 8.3.7.3 Using Cycle Slip Reduction (CSR) to Avoid Cycle Slipping
        4. 8.3.7.4 Using Fastlock to Improve Lock Times
        5. 8.3.7.5 Capacitor Dielectric Considerations for Lock Time
      8. 8.3.8 Fractional Spur and Phase Noise Controls
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Pins, Power-Down, and Power-Up Modes
    5. 8.5 Programming
      1. 8.5.1 General Programming Information
        1. 8.5.1.1 Register Location Truth Table
        2. 8.5.1.2 Control Register Content Map
    6. 8.6 Register Maps
      1. 8.6.1 R0 Register
        1. 8.6.1.1 RF_FN[11:0] - Fractional Numerator for RF PLL
        2. 8.6.1.2 RF_N[10:0] - RF N Counter Value
      2. 8.6.2 R1 Register
        1. 8.6.2.1 RF_FD[11:0] - RF PLL Fractional Denominator
        2. 8.6.2.2 RF_R [5:0] - RF R Divider Value
        3. 8.6.2.3 RF_P - RF Prescaler bit
        4. 8.6.2.4 RF_PD - RF Power Down Control Bit
      3. 8.6.3 R2 Register
        1. 8.6.3.1 IF_N[18:0] - IF N Divider Value
        2. 8.6.3.2 IF_PD - IF Power Down Bit
      4. 8.6.4 R3 Register
        1. 8.6.4.1 IF_R[11:0] - IF R Divider Value
        2. 8.6.4.2 RF_CPG - RF PLL Charge Pump Gain
        3. 8.6.4.3 Access - Register Access word
      5. 8.6.5 R4 Register
        1. 8.6.5.1 MUX[3:0] Frequency Out & Lock Detect MUX
        2. 8.6.5.2 IF_P - IF Prescaler
        3. 8.6.5.3 RF_CPP - RF PLL Charge Pump Polarity
        4. 8.6.5.4 IF_CPP - IF PLL Charge Pump Polarity
        5. 8.6.5.5 OSC_OUT Oscillator Output Buffer Enable
        6. 8.6.5.6 OSC2X - Oscillator Doubler Enable
        7. 8.6.5.7 FM[1:0] - Fractional Mode
        8. 8.6.5.8 DITH[1:0] - Dithering Control
        9. 8.6.5.9 ATPU - PLL Automatic Power Up
      6. 8.6.6 R5 Register
        1. 8.6.6.1 Fractional Numerator Determination [ RF_FN[21:12], RF_FN[11:0], ACCESS[1] ]
        2. 8.6.6.2 Fractional Denominator Determination [ RF_FD[21:12], RF_FD[11:0], ACCESS[1]]
      7. 8.6.7 R6 Register
        1. 8.6.7.1 RF_TOC - RF Time Out Counter and Control for FLoutRF Pin
        2. 8.6.7.2 RF_CPF - RF PLL Fastlock Charge Pump Current
        3. 8.6.7.3 CSR[1:0] - RF Cycle Slip Reduction
      8. 8.6.8 R7 Register
        1. 8.6.8.1 DIV4 - RF Digital Lock Detect Divide By 4
        2. 8.6.8.2 IF_RST - IF PLL Counter Reset
        3. 8.6.8.3 RF_RST - RF PLL Counter Reset
        4. 8.6.8.4 RF_TRI - RF Charge Pump Tri-State
        5. 8.6.8.5 IF_TRI - IF Charge Pump Tri-State
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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

12 Device and Documentation Support

12.1 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.

12.2 Trademarks

E2E is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

12.3 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.

12.4 Glossary

SLYZ022 — TI Glossary.

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