VFJA402 Jitter Attenuator with 3 Input Frequency Selections plus Free Run Mode RoHS Status Features ¾ ¾ ¾ ¾ Free Run Mode 8KHz to 200MHz Input Frequency Range Ultra Low Jitter and Phase Noise: -130dBc/Hz @ 1KHz Low Power: < 150mW typical Applications ¾ ¾ Synchronous Ethernet Wireless Infrastructure Description The VFJA402 is a jitter attenuator capable of providing an output frequency up to 200MHz. Two select inputs [S1,S0] allow the user to select 1 of 3 preset input frequencies or the free run mode. In free run mode the device provides the nominal output frequency and is not phase locked to the input frequency. Operating with a +3.3 volt power supply the device typically consumes 150mW. The output is configured as a differential LVPECL signal and requires external termination resistors. The VFJA402 is available in a 19.5mm x 15.5mm surface mount package. Filter F in S0 S1 Fout Disable uController Vcc VCXO PFD R-Divider N- Divider Vccp .1 uF Block Diagram 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409 1 VFJA402 Jitter Attenuator with 3 Input Frequency Selections plus Free Run Mode Absolute Maximum Ratings Parameter Symbol Supply Break Down Voltage Storage Temperature Vcc Ts Condition Min Typ Max Unit -0.5 5.5 V -55 +105° °C Note Electrical Specifications Parameter Output Frequency Range Input Frequency Range Input Level Output Level Logic “1” Output Level Logic “0” Phase Jitter SSB Phase Noise Symbol Condition Min Typ Max Unit Fout 10 200 MHz Fin 0.008 200 MHz See Table 1 0.4 3.3 V p-p Note 2 Vcc-0.96 Vcc-0.81 V Vcc-1.85 Vcc-1.65 V 0.5 ps(rms) Vin Voh Vol Фn AC coupled internally 50 Ohm to Vcc-2V or Thevenin Equivalent 12KHz to 20MHz 100Hz 1KHz 10KHz 100KHz 0.20 -100 -130 -145 -150 dBc/Hz APR ± 32 ppm Modulation BW Free run Accuracy Duty Cycle 10 Hz Rise / Fall Time -40 ºC to +85 ºC @ 50% Tr/Tf 45 50 20% to 80% +/- 35 ppm 55 % 0.6 ns 3 Start up time Supply Voltage Vcc Input Current Operating Temperature Range Enable / Disable Function Enable / Disable Time Icc Notes: 1. 2. 3. Note 3.15 Ta -40° Note 1 s 3.30 3.45 V 45 55 mA +85° °C Input HIGH (>2.5V): Output Disabled (Fout=”0”; nFout=”1”) Input LOW (<0.5V) or floating: Output Enabled Te/Td @ 155.52MHz 100 LVCMOS ns Consult factory for Bandwidth options For Fin < 20 MHz , ensure SR > 50 V/µs For best noise immunity use [S1, S0] = [0, 0] 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409 2 VFJA402 Jitter Attenuator with 3 Input Frequency Selections plus Free Run Mode How to Order Standard Frequencies P/N suffix -001 -003 -005 -007 (See Table 1) Suffix VFJA402 Table 1 S1:S0 Input Frequency (MHz) 00 01 10 11 Free Run Mode 0.008 19.44 161.1328125 Output Frequency (MHz) 156.25 156.25 156.25 156.25 00 01 10 11 Free Run Mode 161.1328125 19.44 125 156.25 156.25 156.25 156.25 00 01 10 11 Free Run Mode 25 100 100 155.52 155.52 155.52 155.52 00 01 10 11 Free Run Mode 161.1328125 19.44 125 125.00 125.00 125.00 125.00 P/N suffix -002 -004 Note 3 -006 -008 S1:S0 Input Frequency (MHz) Output Frequency (MHz) 00 01 10 11 Free Run Mode 0.008 19.44 155.52 155.52 155.52 155.52 155.52 00 01 10 11 25 25 25 25 155.52 155.52 155.52 155.52 00 01 10 11 Free Run Mode 25 125 156.25 156.25 156.25 156.25 156.25 00 01 10 11 Free Run Mode 19.20 19.20 19.20 153.60 153.60 153.60 153.60 Once Input and Output frequencies have been submitted and approved, the Factory will assign a part number. 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409 3 VFJA402 Jitter Attenuator with 3 Input Frequency Selections plus Free Run Mode Environmental and Mechanical Parameter Mechanical Shock Thermal Shock Specification Per MIL-STD-202, Method 213, Condition E Per MIL-STD-883, Method 1011, Condition A Vibration Per MIL-STD-883, Method 2007, Condition A Soldering Conditions 260°C for 10s max Leak rate less than 5x10-8 atm.cc/s of helium (crystal only) Hermetic Seal Mechanical Outline Connection Diagram Vcc = 3.3V C1 .1 uF Disable 3 4 2 10 Fin 1 12 S1 S0 5 7 11 8 14 R1 180 Ω Fout nFout R2 180 Ω Gnd Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Description Fin DNC Vccp Vcc S1 DNC S0 Gnd N/C Disable nFout Fout N/C Gnd * Connect pin #3 to pin #4 and add .1 uF 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409 4 VFJA402 Jitter Attenuator with 3 Input Frequency Selections plus Free Run Mode Recommended Pad Layout 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • RevG0409 5