(Preliminary) Analog Frequency Multiplier
PL565-37/38 VCXO Family
PRODUCT DESCRIPTION The Analog Frequency Multiplier (AFM) is 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 the use of a phase-locked loop (PLL), in CMOS technology.
The PL565-37/38 products can achieve up to 250 MHz output frequency with little jitter or p.
Analog Frequency Multiplier
(Preliminary) Analog Frequency Multiplier
PL565-37/38 VCXO Family
PRODUCT DESCRIPTION The Analog Frequency Multiplier (AFM) is 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 the use of a phase-locked loop (PLL), in CMOS technology.
The PL565-37/38 products can achieve up to 250 MHz output frequency with little jitter or phase noise deterioration. In addition, the low frequency input crystal requirement makes the AFMs the most affordable high-performance timing-source in the market.
Product Selector Part Number
PL565-38 PL565-37
Output Type
PECL Output CMOS Output
FEATURES
Non-PLL frequency multiplication Input frequency from 30-62.5 MHz Output frequency from 120-250 MHz Low phase noise and jitter (equivalent to fundamental
crystal at the output frequency) Ultra-low jitter
o RMS phase jitter < 0.25 ps (12kHz-20MHz) o RMS period jitter < 25 ps Low phase noise o -147 dBc/Hz @100kHz offset from 155.52 MHz o -157 dBc/Hz @10MHz offset from 155.52 MHz
High linearity pull range (typ. 5%) +/- 120 PPM pullability VCXO Low input frequency eliminates the need for expensive
crystals
Differential output levels PECL or single-ended CMOS Single 3.3V, ±10% power supply Optional industrial temperature range (-40C to +85C)
Figure 1: 4X AFM Phase Noise at 155.52MHz
Micrel Inc. • 2180 Fortune .