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  • TRF3761-x Integer-N PLL with Integrated VCO

    • SLWS181K October   2005  – December 2015 TRF3761-A , TRF3761-B , TRF3761-C , TRF3761-E , TRF3761-F , TRF3761-G , TRF3761-H , TRF3761-J

      PRODUCTION DATA.  

  • CONTENTS
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  • TRF3761-x Integer-N PLL with Integrated VCO
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  Recommended Operating Conditions
    3. 7.3  Thermal Information
    4. 7.4  Electrical Characteristics
    5. 7.5  Electrical Characteristics, TRF3761-A
    6. 7.6  Electrical Characteristics,TRF3761-B
    7. 7.7  Electrical Characteristics, TRF3761-C
    8. 7.8  Electrical Characteristics, TRF3761-D
    9. 7.9  Electrical Characteristics, TRF3761-E
    10. 7.10 Electrical Characteristics, TRF3761-F
    11. 7.11 Electrical Characteristics, TRF3761-G
    12. 7.12 Electrical Characteristics, TRF3761-H
    13. 7.13 Electrical Characteristics, TRF3761-J
    14. 7.14 Timing Requirements
    15. 7.15 Typical Characteristics
      1. 7.15.1 Typical Characteristics, TRF3761-A (See )
      2. 7.15.2 Typical Characteristics, TRF3761-B (See )
      3. 7.15.3 Typical Characteristics, TRF3761-C (See )
      4. 7.15.4 Typical Characteristics, TRF3761-D (See )
      5. 7.15.5 Typical Characteristics, TRF3761-E (See )
      6. 7.15.6 Typical Characteristics, TRF3761-F (See )
      7. 7.15.7 Typical Characteristics, TRF3761-G (See )
      8. 7.15.8 Typical Characteristics, TRF3761-H (See )
      9. 7.15.9 Typical Characteristics, TRF3761-J (See )
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  VCO
      2. 8.3.2  Divide by 2, by 4, and Output Buffer
      3. 8.3.3  N-Divider
        1. 8.3.3.1 Prescaler Stage
        2. 8.3.3.2 A and B Counter Stage
        3. 8.3.3.3 Reference Divider
      4. 8.3.4  Phase Frequency Detector (PFD) and Charge Pump Stage
      5. 8.3.5  Mux Out
      6. 8.3.6  Div 1/2/4
      7. 8.3.7  Serial interface
      8. 8.3.8  CHIP ENABLE
      9. 8.3.9  Buffer Power Down
      10. 8.3.10 External VCO IN
    4. 8.4 Device Functional Modes
      1. 8.4.1 Programmable Divider Mode
    5. 8.5 Programming
      1. 8.5.1 Serial Interface Programming Registers Definition
    6. 8.6 Register Maps
      1. 8.6.1 Register 1
      2. 8.6.2 Register 2
      3. 8.6.3 Register 3
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Loop Filter Design
    2. 9.2 Typical Applications
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Loop Filter Design Example
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Initial Calibration and Frequency Setup at Power Up
          1. 9.2.2.1.1 Register 1
          2. 9.2.2.1.2 Register 2
          3. 9.2.2.1.3 Register 3
        2. 9.2.2.2 Re-Calibration After Power Up
        3. 9.2.2.3 Synthesizing a Selected Frequency
      3. 9.2.3 Application Curve
      4. 9.2.4 Application Example for a High Performance RF Transmit Signal Chain
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • RHA|40
    • MPQF135D
Thermal pad, mechanical data (Package|Pins)
  • RHA|40
    • QFND114P
Orderable Information
  • slws181k_oa
  • slws181k_pm
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DATA SHEET

TRF3761-x Integer-N PLL with Integrated VCO

1 Features

  • Fully Integrated VCO
  • Low Phase Noise: –137dBc/Hz (at 600kHz, fVCO of 1.9GHz)
  • Low Noise Floor: –158dBc/Hz at 10MHz Offset
  • Integer-N PLL
  • Input Reference Frequency range: 10MHz to 104MHz
  • VCO Frequency Divided by 2-4 Output
  • Output Buffer Enable Pin
  • Programmable Charge Pump Current
  • Hardware and Software Power Down
  • 3-Wire Serial Interface
  • Single Supply: 4.5V to 5.25V Operation

2 Applications

  • Wireless Infrastructure
    • WCDMA, CDMA, GSM
    • Wideband Transceivers
    • Wireless Local Loop
    • RFID Transceivers
    • Clock generation
    • IF LO generation

3 Description

TRF3761 is a family of high performance, highly integrated frequency synthesizers, optimized for high performance applications. The TRF3761 includes a low-noise, voltage-controlled oscillator (VCO) and an integer-N PLL.

TRF3761 integrates divide-by 1, 2, or 4 options for a more flexible output frequency range. It is controlled through a 3-wire serial-programming-interface (SPI) interface. For power sensitive applications the TRF3761 can be powered down by the SPI interface or externally via chip_en pin 2.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TRF3761 VQFN (40) 6.00 mm x 6.00 mm
TRF3761-x
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Application Schematic

TRF3761 TRF3761-A TRF3761-B TRF3761-C TRF3761-D TRF3761-E TRF3761-F TRF3761-G TRF3761-H TRF3761-J TRF3761-K fp_app_lws181.gif

4 Revision History

Changes from J Revision (August 2009) to K Revision

  • Added Pin Configuration and Functions section, ESD Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
  • Changed High-level input voltage MIN value From: 2.5 To: VCC - 2V Go

Changes from I Revision (March 2008) to J Revision

  • Changed Figure 2 Go
  • Changed Figure 3Go
  • Changed Figure 4 Go
  • Changed Figure 5 Go
  • Changed Figure 6 Go
  • Changed Figure 7 Go
  • Changed Figure 8 Go
  • Changed Figure 9 Go
  • Changed Figure 10 Go

5 Device Comparison Table

PART NUMBER Div by 1 Div by 2 Div by 4
Fstart Fstop Fstart Fstop Fstart Fstop
TRF3761-A 1493 1608 746.5 804 373.25 402
TRF3761-B 1595 1711 797.5 855.5 398.75 427.75
TRF3761-C 1660 1790 830 895 415 447.5
TRF3761-D 1740 1866 870 933 435 466.5
TRF3761-E 1805 1936 902.5 968 451.25 484
TRF3761-F 1850 1984 925 992 462.5 496
TRF3761-G 1920 2059 960 1029.5 480 514.75
TRF3761-H 2028 2175 1014 1087.5 507 543.75
TRF3761-J 2140 2295 1070 1147.5 535 573.75

 
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