Q-Tech VCXO - Manual (Page 2)

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Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
VOLTAGE CONTROLLED (VCXO)
CRYSTAL CLOCK OSCILLATORS
-5.2Vdc & 5.0Vdc - 1kHz to 155.52MHz
Voltage Controlled (VCXO) (Revision E, August 2010 ) (ECO# 9940)
Electrical Characteristics
Parameters ACMOS HCMOS TTL SINE ECL PECL
Output freq. range (Fo)
(See note 1)
QT6, 18, 41, 42 375kHz — 70MHz 1kHz — 70MHz 1MHz — 27MHz 12MHz — 27MHz
QT50 375kHz — 27MHz N/A N/A
QT57 1kHz — 155.52MHz 1MHz — 155.52MHz 12MHz — 155.52MHz
QT24 375kHz — 70MHz 1kHz — 70MHz N/A Please call
QT62 1MHz — 27MHz N/A N/A
QT75 15MHz — 70MHz N/A N/A
Supply voltage (Vcc) (See note 2) 5.0Vdc ± 10% -5.2Vdc ± 5% 5.0Vdc ± 5% (PECL)
Maximum Applied Voltage (Vdd max.) -0.5 to +7.0Vdc 0 to -8.0Vdc -0.5 to +7.0Vdc
Freq. stability (∆F/∆T) See Option codes
Operating temp. (Topr) See Option codes
Storage temp. (Tsto) -62ºC to + 125ºC
Operating supply current
(No Load)
25 mA max. Fo < 20MHz
35 mA max. Fo ~ 20MHz to < 30MHz
45 mA max. Fo ~ 30MHz to < 70MHz
65 mA max. Fo ~ 70MHz to 155.52MHz 65mA max. 65 mA max. Fo < 50MHz
85 mA max. Fo ~ 50MHz to 155.52MHz
Symmetry
(See note 3) 45/55% max. Fo < 12MHz
40/60% max. Fo~ 12MHz to 155.52MHz
N/A
40 / 60% max.
Rise and Fall times (Tr/Tf)
(with typical load) 6ns max. Fo < 30MHz
3ns max. Fo ~ 30MHz to 155.52MHz
N/A
3.5ns max. Fo < 125MHz
3.0ns max. Fo ~ 125MHz to 155.52MHz
Output Load
15pF // 10kΩ 10TTL Fo < 20MHz
6TTL Fo ≥ 20 MHz
50Ω 50Ω into Vcc -2V
Control Voltage Vc (See note 4) 0V to 5Vdc 0V to -5.2Vdc 0V to 5Vdc
Frequency pulling (See note 5) ± 100ppm min.
Transfer function (See note 6) Positive
Linearity (See note 7) ± 10% max.
Modulation bandwidth up to 10kHz
Input impedance > 10kΩ
Output logic ACMOS HCMOS TTL Sine, 0dBm min. 10K / 10KHECL PECL
Harmonics (See note 8) -20dBc max.
Subharmonics (See note 8) N/A -30dBc max. N/A
Phase noise (typ.)
(See note 9)
10Hz -70dBc / Hz
100Hz -95dBc / Hz
1kHz -120dBc / Hz
10kHz -135dBc / Hz
100kHz -145dBc / Hz
Start-up time 10ms max.
Notes: Custom designs are available with Q-Tech custom MCM part numbers.
1. Other frequencies and packages are available. Please contact for details.
2. Other supply voltages are available. Please contact for details.
3. Tighter symmetry is available other than 40/60% max.
4. Other Vc and bipolar control voltages are available. Please contact for details.
5. Wide frequency pulling is available up to ±500ppm min. APR is also available.
6. Negative transfer function is available.
7. Better linearity than ±10% is available.
8. Harmonics better than -20dBc and subharmonics better than -30dBc are available.
9. Phase noise screening test is available.
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