PL663-29 Datasheet | Micrel Semiconductor

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), bined 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/ Ro HS pliant 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 k Hz to 20 MHz) o RMS period jitter < 2.5 ps typ. - Low phase noise o -145 d Bc/Hz @ 100 k Hz offset from 155.52 MHz o -150 d Bc/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 (-40C to +85C) - Available in 16-pin GREEN/Ro HS pliant 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. - 2180 Fortune Drive - San Jose, CA 95131 - USA - tel +1(408) 944-0800 - fax +1(408) 474-1000 - .micrel. Rev. 02/18/10 Page 1 Analog Frequency Multiplier PL663-xx XO Families L2X R XOUT Oscillator Amplifier Only required in x4 designs Frequency X2 Frequency X4 L4X OE QBAR Q Figure 2: Block Diagram of AFM XO Figure 3 shows the period jitter histogram of the 2x Analog Frequency Multiplier at 212.5 MHz, while Figure 4 shows the very low levels of sub-harmonics that correspond to the exceptional performance (i.e. low jitter). Figure 3: Period...