Q-Tech VCXO - Manual (Page 5)

5
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)
Q-TECH
CORPORATION
Frequency vs. Temperature Curve
Output Waveform (Typical)
39,992,000
39,994,000
39,996,000
39,998,000
40,000,000
40,002,000
40,004,000
40,006,000
40,008,000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Vc (V)
Output Frequency
, Hz
-5%
-4%
-3%
-2%
-1%
0%
1%
2%
3%
4%
5%
Integral Linearity
, %
5
SN1 SN2 SN3 SN4 SN1 integral linearity SN2 integral linearity SN3 integral linearity SN4 integral linearity
-600
-500
-400
-300
-200
-100
100
200
300
400
500
600
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 4.5 4.75 5 5.25 5.5 5.75
Applied Vc, volts
Frequency Deviation, PPM
0
3721 3737 3739 3722 3723 3724 3725 3727 3728 3731 3732 3734 3735 3736 3738
0
-50
-40
-30
-20
-10
10
20
30
40
50
-45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Temp (°C)
Frequency Deviation, PPM
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 4.5 4.75 5
VC (V)
Integral Linearity
, %
-300
-200
-100
100
200
300
400
Frequency Pulling, PPM
0
Vdd
GND
0.1xVdd
0.9xVdd
VOH
VOL
Tr Tf
TH
T
0.5xVdd
SYMMETRY = x 100%
TH
T
0
-5%
-4%
-3%
-2%
-1%
0%
1%
2%
3%
4%
5%
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 4.5 4.75 5
Vc (V)
Integral Linearity
, %
-300
-250
-200
-150
-100
-50
50
100
150
200
250
300
Frequency Pulling, ppm
100.2°C Integral Linearity 25°C Integral Linearity -54.9°C Integral Linearity 2 100.2°C centered 2 25°C centered 2 -54.9°C centered
-
-
Output
Ground
Vcc
DUT
Out
GND
0.1µF
15pF
Vc
Vc
Power
Supply
10k
mA
Vdc
+
+
+
(*)
or
0.01µF
(*) CL includes probe and jig capacitance
Typical test circuit for VCXO CMOS logic
Test Circuit
QT6VHC-40MHz INTEGRAL LINEARITY AND PULLABILITY Vc=0V to 5Vdc QT58VHC-32MHz PULLING AND INTEGRAL LINEARITY
WIDE PULL VCXO QT957S - 16MHZ WIDE PULL VCXO QT957S-16MHz FREQUENCY STABILITY VS. TEMPERATURE
QT75VHC-54.04MHz FREQUENCY PULLING AND LINEARITY VC=0V TO 5Vdc