Analog Frequency Multiplier
Analog Frequency Multiplier
PL663-xx XO Families
DESCRIPTION Analog Frequency Multipliers TM (AFMs) are the industry’s ...
Description
Analog Frequency Multiplier
PL663-xx XO Families
DESCRIPTION Analog Frequency Multipliers TM (AFMs) are the industry’s first “Balanced Oscillator” utilizing analog multiplication of the fundamental frequency (at double or quadruple frequency), combined with an attenuation of the fundamental of the reference crystal, without using a phase-locked loop (PLL), in CMOS technology. Patent pending PL663-xx family of AFM products can achieve up to 800 MHz differential LVPECL, LVDS, or single-ended LVCMOS output with little jitter or phase noise deterioration.
PL663-xx family of products utilizes a low-power CMOS technology and is housed in GREEN/ RoHS compliant 16-pin TSSOP and 3x3 QFN packages.
FEATURES Non-PLL frequency multiplication Input frequency from 30-200 MHz Output frequency from 60-800 MHz
Low phase noise and jitter (equivalent to fundamental at the output frequency)
Ultra-low jitter o RMS phase jitter < 0.25 ps (12 kHz to 20 MHz) o RMS period jitter < 2.5 ps typ.
Low phase noise o -145 dBc/Hz @ 100 kHz offset from 155.52 MHz o -150 dBc/Hz @ 10 MHz offset from 155.52 MHz
Low input frequency eliminates the need for expensive crystals
Differential LVPECL/LVDS, or single-ended LVCMOS output
Single 2.5V or 3.3V +/- 10% power supply Optional industrial temperature range (-40C to
+85C)
Available in 16-pin GREEN/RoHS compliant TSSOP, and 16-pin 3x3 QFN packages.
Figure 1: 2X AFM Phase Noise at 212.5 MHz (106.25 MHz 3rd overtone crystal)
Micrel Inc. 21...
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