TCVCXO Specification
Part No. + Packaging:
LFTVXO070167Cutt
Description
The IQXT-270-9 Temperature Compensated Crystal Oscillator
(TCXO) employs an analogue ASIC for the oscillator and a high
order temperature compensation circuit in a 2.0 x 1.6mm size
package.
Model
IQXT-270-9
Model Issue number
1
Frequency Parameters
Frequency
Frequency Tolerance
Frequency Stability
19.20MHz
±1.00ppm
±
0.50ppm
Operating Temperature Range
-30.00 to 85.00°C
Ageing
±1ppm max per year at 25°C
Frequency Tolerance: Offset from nominal frequency
measured at 25˚C ±2˚C.
Reflow Shift (two consecutive reflows as per profile after 1
hour relaxation at 25°C): ±1ppm max
Frequency Stability: Referenced to the midpoint between
minimum and maximum frequency value over the specified
temperature range. Control voltage set to midpoint of control
voltage (note 1).
Frequency Slope (minimum of one frequency reading every
2°C, over -10 to 60°C - note 1): 0.05ppm/°C max
Frequency drift (calculated from frequency slope with
temperature varied at a maximum of 1.92°C/min (0.032°C/s)
over -10°C to 60°C, note 5): 1.6ppb/sec max
Frequency Slope (minimum of one frequency reading every
2°C, over -30°C to -85°C, note 1): 0.1ppm/°C max
Frequency drift (calculated from frequency slope with
temperature varied at a maximum of 0.96°C/min (0.016°C/s)
over -30°C to 85°C, note 5): 1.6ppb/sec max
Small thermal cycle frequency slope (measured at 0.5°C
intervals over any 5°C heating and 5°C cooling cycle, at a
minimum rate of 1°C/minute within the operating temperature
range, note 6): 50ppb/°C max
Small thermal cycle hysteresis (difference in frequency
measurements over any 5°C heating and 5°C cooling cycle, at
a minimum rate of 1°C/minute within the operating temperature
range): 50ppb pk-pk max
Supply Voltage Variation (±5% change at 25°C): ±0.1ppm max
Load Variation (±10% change at 25°C): ±0.2ppm max
Electrical Parameters
Outline (mm)
Pb-Free Reflow
1.8V ±5%
Supply Voltage
Current Draw
2.00mA
Supply Current (at Vs max - note 2)
Frequency Adjustment
Pulling
Control Voltage
±15.6ppm to ±24ppm
1.4V ±1.0V
Input Impedence
500kΩ min
Control voltage range: the nominal control voltage value is
midway between the minimum and maximum. Voltage control
should not exceed the supply voltage +0.2V or GND.
Linearity (deviation from straight line curve fit): 10% max
Sales Office Contact Details:
UK: +44 (0)1460 270200
Germany: 0800 1808 443
France: 0800 901 383
USA: +1.760.318.2824
Email: info@iqdfrequencyproducts.com
Web: www.iqdfrequencyproducts.com
Page 1 of 3
Printed on 26 May 16 23:24 using Part Data Sheet V1.00014
TCVCXO Specification
Part No. + Packaging:
LFTVXO070167Cutt
Output Details
Clipped Sine
Output Compatability
Drive Capability
10kΩ//10pF ±10%
Output: DC coupled (note 3)
Output Voltage Level (at Vs min - note 2): 0.8V pk-pk min
Noise Parameters
Phase Noise (typ @ 25˚C):
-64dBc/Hz @ 1Hz
-93dBc/Hz @ 10Hz
-118dBc/Hz @ 100Hz
-137dBc/Hz @ 1kHz
-149dBc/Hz @ 10kHz
-151dBc/Hz @ 100kHz
Phase Noise (max @ 25˚C):
-57dBc/Hz @ 1Hz
-86dBc/Hz @ 10Hz
-111dBc/Hz @ 100Hz
-133dBc/Hz @ 1kHz
-144dBc/Hz @ 10kHz
-148dBc/Hz @ 100kHz
Environmental Parameters
Shock: MIL-STD-202 M213 (note 4): Half sine-wave
acceleration of 3000G peak amplitude, duration 0.3ms,
velocity 12.3ft/s.
Moisture Resistance: MIL-STD-202 M106g (note 4): 1000
hours at 85°C, 85% relative humidity. Biased.
Thermal Cycling: JESD22 Method JA-104C (note 4): 1000
temperature cycles, where each cycle consists of a 25
minutes soak time at -40°C followed by a 25 minute soak time
at 85°C, with a 60 second maximum transition time between
temperatures. Air to air transition.
Vibration: JESD22-B103-B (also see note 4): 10G peak
acceleration for 20 minutes 12 cycles in each of the 3
orientations, swept from 10-2000Hz.
Storage Temperature Range: -40 to 85°C
Manufacturing Details
Maximum Process Temperature: 260˚C (40secs max)
Note 1: Parts should be shielded from drafts causing
unexpected thermal gradients. Temperature changes due to
ambient air currents can lead to short term frequency drift.
Note 2: Specified for the load stated in Output Details above,
at 25°C.
Note 3: External AC coupling capacitor required; 1nF or
greater recommended.
Note 4: Frequency shift of ±1ppm max after environmental
conditions.
Note 5: Frequency drift rate is calculated from the equation
ppb/s=°C/s x ppb/°C
Note 6: Discard the first 0.5°C interval of each heating and
cooling cycle.
Compliance
RoHS Status (2011/65/EU)
REACh Status
MSL Rating (JDEC-STD-033):
Compliant
Compliant
Not Applicable
Sales Office Contact Details:
UK: +44 (0)1460 270200
Germany: 0800 1808 443
France: 0800 901 383
USA: +1.760.318.2824
Email: info@iqdfrequencyproducts.com
Web: www.iqdfrequencyproducts.com
Page 2 of 3
Printed on 26 May 16 23:24 using Part Data Sheet V1.00014
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