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参数资料
| 型号： | QT50VAC12-FREQ |
| 厂商： | Q-TECH CORP |
| 元件分类： | VCXO, clock |
| 英文描述： | VCXO, CLOCK, 5 MHz - 60 MHz, ACMOS OUTPUT |
| 封装： | HERMETICALLY SEALED, DIP-4 |
| 文件页数： | 1/2页 |
| 文件大小： | 164K |
| 代理商： | QT50VAC12-FREQ |
VCXO
VOL T AGE CONTROLLED
Dual In-Line
Crystal
Oscillators
Q-Tech
Please contact us
for variations
on these
specifications
Q-Tech
Corporation
(310) 836-7900
fax (310) 836-2157
MODEL#
OUTPUT LOGIC OPTIONS
STABILITY
SCREENING
FREQUENCY
*
QT57 offers a broader range of capabilities. Consult the factory for details.
**
Frequency range for QT50 is 5.000 MHz to 60.000 MHz for TTL, HC/ACMOS.
ORDERING
(INFORMATION)
sample part number
QT6VHC9M - 20.000 MHz
QT6V
HC
9
M
-
20.000 MHz
Upper dimensions
in inches - lower
dimensions in
millimeters. Unless
otherwise specified,
tolerances are
.005 (.127mm.).
Detailed mechanical
drawings available
by request.
QT
6V, QT 41V,
QT
50V, QT 57V*
Please refer to
stability table on
opposite page.
Designate M for Class B
M55310 screening. (Optional)
For more information, see page 37.
T
=TTL
HC
= High Speed CMOS
AC
=Advanced CMOS
E
=10K ECL
EH
=10KH ECL
PE
=+5V ECL
From:
1 KHz
to
200 MHz **
See Standard
Electrical
Specifications
on page 21.
20
QT 6V
Q-TECH
P/N
FREQ.
Max.
7
14
8
2.54
1
.300
7.62
.505
12.83
.100
22.35
.200 Max.
5.08
Min.
.200
5.08
.600
.018
.457
15.24
.880 Max.
QT 41V
QT 6V
QT 50V
Q-TECH Voltage Controlled Crystal Oscillators can be frequency
shifted or controlled by changing the voltage at the control point
of the device. VCXOs are used for frequency synthesis, clock
recovery, and other phase-lock loop applications.
The following parameters need to be determined when
specifying a VCXO:
Control Voltage: The available voltage range at the input of the
VCXO to vary the frequency (i.e., 0 - 5V ,±4V, etc.).
Deviation (pull range): The change in the output frequency due
to control voltage change.
Transfer function (sense): Direction of change in frequency as
a function of control voltage.
Temperature range: Operating temperature range.
Stability vs. temperature: Percentage or ppm change in output
frequency with respect to the temperature range at a constant
control voltage.
Input impedance: A measure of isolation between the VCXO
internal frequency control network and the control voltage source.
Linearity: The deviation from the best straight line slope of the
frequency vs. control voltage plot.
Modulation band width (rate): The maximum rate of change of
the control voltage.
If the VCXO is intended for phase-lock applications, the required deviation of
the VCXO can be determined by the following equation (see fig. below):
DEVIATION > (VCXO STABILITY) + (STABILITY OF THE SOURCE)
In this equation, source stability is
a system parameter while VCXO
stability would be a function of
temperature, time, load, and
power supply variations.
PLL simplified model
Source
Phase/Freq.
Detector
LPF
VCXO
Output
O
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