QUARTZ
EURO
VCXOs
GP576 Series PECL
7 x 5 x 2mm SMD Low Jitter PECL VCXO
Stable and clean 100KH differential signals
Uses Inverted MESA, fundamental-mode crystals
No PLL, multiplier or overtone-mode crystals used
Very low jitter <1ps
·
Miniature 6 pad package, RoHS Compliant
DESCRIPTION
OUTLINE & DIMENSIONS
GP series VCXOs use fundamental mode (inverted mesa) crystal to
achieve wide frequency deviation with stable and clean signals. No
multiplier, overtone crystal or phase lock loop technique is used. As a
result Jitter is as low as for instance 1ps for the 155.520 MHz for
SONET/SDH application. Additionally, the inherent advantages of
differential PECL ECL signal transmission provide improved noise
immunity making the system less susceptible to ground noise.
SPECIFICATION
Frequency Range:
Output Waveform:
Standard Frequencies:
19.440MHz to 250MHz
PECL 100K square wave
38.880, 44.736, 50.0, 77.76,
100.0, 106.25, 125.0, 155.52,
166.6286, 200.0, 207.360 and
212.50MHz (Partial List)
15pF
Output Load:
Frequency Stability:
Input Voltage (Vcc)
see table
LVPECL:
PECL:
+3.3 VDC ±5%
+5.0 VDC ±5%
Supply Voltage
Supply Voltage
Dependant Parameters
+3.3 Volts ±5% +5.0 Volts ±5%
Initial Frequency Accuracy
To tune to nominal
frequency with:
Vc=+1.65V±0.2V Vc=+2.5V±0.2V
Output Voltage HIGH ‘1’:
Output Voltage LOW ‘0’:
Rise/Fall Time
2.27V minimum
1.68V maximum
5ns maximum
4.5V minimum
3.35V maximum
7ns maximum
FREQUENCY STABILITY
Current Consumption:
80mA max.
(Frequency dependant)
Temp. Range
Stability Code Stability ±ppm
Duty Cycle:
Integrated Jitter RMS:
12kHz to 20MHz:
50%±2% typical, 50%±5% max.
A
B
C
D
E
25
50
100
25
50
0°~+70°C
0°~+70°C
0°~+70°C
-40°~+85°C
-40°~+85°C
-40°~+85°C
0.4ps typical, 0.5ps max.
(Example at 155.250MHz)
SSB Phase Noise
10Hz offset:
100Hz offset: -80dBc
1kHz offset: -110dBc
-50dBc
F
100
If non-standard frequency stability is required
Use ‘I’ followed by stability, i.e. I20 for ±20ppm
10kHz offset: -135dBc
100kHz offset: -145dBc
PART NUMBERING
1MHz offset:
-145dBc
Frequency Deviation Range
Supply = 3.3 V:
Example: 3G576B-80N-27.000
±80ppm
Supply Voltage
3 = +3.3V
5 = +5.0V
Supply = 5.0 V:
±100ppm
(Wider pull range available)
±10% max.
Linearity:
Series Designator
Slope Polarity:
Monotonic and Positive
Stability over temperature range
(See table)
(An increase of control voltage increases output freq.)
Start-up Time:
10ms max.
Pullability in ±ppm
Pullability determinator
N = minimum
M = maximum
T = Typical
Input Impedance:
3dB Modulation Bandwidth:
Ageing:
Storage Temperature:
Tristate function (Pad 2):
>10kOhm
10Hz minimum
±2ppm year max at 25°C
-55° to +100°C
Frequency in MHz
PECL output is disabled and Complimentary output
remains high when tristate pad is HIGH. Both outputs
are HIGH when Tristate pin is LOW.
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 Email: info@euroquartz.co.uk www.euroquartz.co.uk