SNAU210B March   2020  – July 2021

 

  1.   Trademarks
  2. 1Evaluation Board Setup
  3. 2EVM Description
    1. 2.1 Installing the Software
  4. 3Bringing LMX2594 to a Lock State
  5. 4Loop Filter Configuration
  6. 5Key Results to Expect
  7.   A Schematic
  8.   B Bill of Materials
  9.   C Board Layers Stack-Up
  10.   D Changing Reference Oscillator and Setup
  11.   E Connecting Reference Pro
  12.   F Ramping Feature
  13.   G SYSREF Feature
  14.   H Enabling Onboard DC-DC Buck Converter (TPS62150)
  15.   Revision History

4 Loop Filter Configuration

The parameters for the loop filters are:

Table 4-1 Loop Filter Configuration
PARAMETER VALUE
VCO Gain 132 MHz/V
Loop Bandwidth 285 kHz
Phase Margin 65 deg
C1_LF 390 pF
C2_LF 68 nF
C3_LF Open
C4_LF 1800 pF
R2 68 Ω
R3_LF 0 Ω
R4_LF 18 Ω
Effective Charge Pump Gain 15 mA
Phase Detector Frequency (MHz) 200 MHz
VCO Frequency Designed for 15 GHz, but works over the whole frequency range
GUID-D4CDAE5C-95ED-4CF0-AFAA-721C836CCD04-low.png Figure 4-1 Loop Filter Configuration

For detailed design and simulation of TI's PLLATINUM™ integrated circuits, see the PLLatinum Sim Tool.

For application notes, blogs, or videos on TI PLL products, see http://www.ti.com/pll.