euroquartz limited blacknell lane crewkerne somerset uk ta18 7he tel: +44 (0)1460 230000 fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk euro quartz gf576 vcxo description outline & dimensions frequency stability a 25 0~+70c b 50 0~+70c c 100 0~+70c d 25 -40~+85c e 50 -40~+85c f 100 -40~+85c if non-standard frequency stability is required use ?i? followed by stability, i.e. i20 for 20ppm over 'industrial' temperature range -40~+85c gf576 vcxos, are packaged in an industry-standard, 6 pad, 7mm x 5mm smd package. the vcxos provide good phase jitter performance, less than 1ps. 10hz -62dbc/hz 100hz -92dbc/hz 1khz -120dbc/hz 10khz -132dbc/hz 100khz -128dbc/hz 1mhz -140dbc/hz 10mhz -150dbc/hz phase noise cmos smd 7 x 5 x 1.8mm, 6 pad 50.01mhz ~ 640.0mhz part number schedule example: 3gf576b-80n-156.25 supply voltage 3 = +3.3v series designator gf576 stability over temperature range (s ee table ) pullability in ppm pullability determinator n = minimum m = maximum t = typical frequency in mhz stability code stability ppm temp. range offset frequency 155.25mhz frequency range 50.01mhz to 640mhz lvcmos output supply voltage 3.3 vdc high q fundamental crystal ultra low jitter less than 1ps frequency range 50.01mhz to 640.0mhz supply voltage: 3.3 vdc 5% output logic: lvcmos integrated phase jitter: 0.4ps typical, 0.5ps maximum (for 156.250mhz) period jitter rms: 3.0ps typical (for 156.250mhz) period jitter peak to peak: 20ps typical (for 156.250mhz) phase noise: see table below initial frequency accuracy: tune to the nominal frequency with vc= 1.65 0.2vdc output voltage high (1): 90% vdd minimum output voltage low (0): 10% vdd maximum frequency deviation range: 80ppm minimum temperature stability: see table output load: 15pf start-up time: 10ms maximum, 5ms typical duty cycle: 50% 5% measured at 50% vdd rise/fall times: 0.7ns typical (15pf load) current consumption <100mhz: 30ma maximum (15pf load) >100mhz: 40ma maximum (15pf load) linearity: 10% maximum, 6% typical modulation bandwidth: 25khz minimum input impedance: 60k w minimum slope polarity: monotonic and positive. ( an (transfer function) increase of control voltage increases output frequency.) storage temperature: -50 to +100c ageing: 3ppm per year first year 2ppm per year thereafter enable/disable (tristate): pad 2, enable high or 70% vdd min. applied to tri-state pad to enable output. 30% vdd max. to disable output (high impedance) rohs status: fully compliant specification
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