LMX1601TMX Datasheet, PDF (16/18 Pages) Texas Instruments – LMX1600 2.0 GHz/500 MHz, LMX1601 1.1 GHz/500 MHz, LMX1602 1.1 GHz/1.1 GHz PLLatinum™ Low Cost Dual Frequency Synthesizer

LMX1600, LMX1601, LMX1602
SNAS017F – MARCH 1998 – REVISED APRIL 2013
TYPICAL APPLICATION EXAMPLE
OBSOLETE
www.ti.com
OPERATIONAL NOTES:
*
VCO is assumed AC coupled.
** R_IN increases impedance so that VCO output power is provided to the load rather than the PLL. Typical
values are 10Ω to 200Ω depending on the VCO power level. The fin RF impedance ranges from 40Ω to
100Ω. The fin IF impedances are higher.
*** 50Ω termination is often used on test boards to allow use of external reference oscillator. For most typical
products, a CMOS clock is used and no terminating resistor is required. OSC_IN may be AC or DC coupled.
AC coupling is recommended because the input circuit provides its own bias. (See Figure 1)
Figure 1.
**** Adding RC filter to the V_CC line is recommended to reduce loop-to-loop noise coupling.
— Proper use of grounds and bypass capacitors is essential to achieve a high level of performance. Crosstalk
between pins can be reduced by careful board layout.
— This is a static sensitive device. It should be handled only at static free work stations.
16
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LMX1600 LMX1601 LMX1602