QUARTZ
EURO
EM44E SINEWAVE TCXO
50 Ohm TCXO 4 pad 11.4 x 9.6 x 4.7mm SMD
Sinewave output TCXO 50 Ohms
Wide frequency range 9.6MHz to 360.0MHz
Supply Voltage from 3.0 to 15.0 Volts
Output 50 Ohm load, power <13dBm
Produced as TCXO or VCTCXO with EFC
DESCRIPTION
EM44E - OUTLINES AND DIMENSIONS
EM44E series TCXOs are packaged in an industry-standard, 11.4 x
9.6mm SMD package. The TCXO may be specified to operate at any
supply voltage from 3.0 to 15.0 Volts. Close tolerances from ±1ppm
over -40° to +85°C are available. With true sine wave output, the part
can be produced as either a standard TCXO or a voltage-controlled
TCXO (VCTCXO).
SPECIFICATION
Product Series Code
TCXO:
EM44E
VCTCXO:
VEM44E
Load:
50
Frequency Range:
Output Waveform:
9.6MHz to 320.0MHz
True Sinewave
Initial Calibration Tolerance*:
Operating Temperature Range:
Output Voltage Level:
±2ppm at 25°C
See table
0.8V p-p min., 1.0V p-p typ.
+15.0, 12.0, 10.0, 9.0, 5.0
3.30 or 3.0 Volts DC±5%
Input Voltage Range:
Frequency Stability
vs. Temperature:
vs. Ageing:
vs. Voltage Change:
vs. Load Change:
Supply Voltage:
See table
±1.0 ppm max. first year
±0.3 ppm max. ±5% change
±0.3 ppm max. ±10% change
+3.0V to +15.0V
(Specify when ordering)
Output Power
Supply +3.0 and +3.3V:
+5dBm (0.4V rms, 3.2mW)
Supply +5.0 V and above: +13dBm (1.0V rms 20mW)
Current Consumption**
At 30.0MHz:
At 310MHz:
Start-up Time:
VEM44E VOLTAGE CONTROL SPECIFICATION
Control Voltage:
+1.5V±1.0V, +2.5V±2.0V
20mA max for 5.0 V supply
75mA max. for 3.3 V supply
5ms typical, 10ms max.
-20dBc max.
(or custom)
±8.0ppm min. for +1.5Volts Vcont.
Narrow: ±1ppm max. (or custom)
Wide: ±35ppm min. (or custom)
Increase of control voltage
increases output frequency.
10% max.
Frequency Deviation Range:
Options:
Harmonic Distortion:
Spurious:
-60dBc
Slope Polarity = Positive:
Linearity:
SSB Phase Noise:
Output Format:
Vibration:
See table
DC block, AC coupled
6g rms, 10~200Hz
15g 11ms, ½ sinewave
3 shocks in each plane
-55° to +125°C
Shock:
Storage Temperature:
PART NUMBERING
Example:
EM44GE5-310.0-2.5/-30+75
*
Stability over temperature is measured from this initial tolerance.
** Current consumption depends upon frequency, voltage and power.
Series Description
TCXO = EM44_E
VCTCXO = VEM44_E
RoHS Status
G = RoHS compliant
Blank = Non-compliant
Supply Voltage*
3 = 3.0Volts
33 = 3.3 Volts
5 = 5.0 Volts
Frequency (MHz)
Temperature Stability
±ppm, see table
Temperature Range
FREQUENCY STABILITY
Frequency Stability (ppm)
0 ~ +50
±0.5
±1.0
±1.5
±2.0
±2.5
ASK
-10 ~ +60
x
x
x
x
Temperature
-20 ~ +70
Range (°C)
-30 ~ +75
-40 ~ +85
ASK
= available, x = not available, ASK = call Technical Sales
= standard specification
°C, lower and upper limits
SSB PHASE NOISE
Offset
(Hz)
10
100
-90
1k
10k
100k
-130
1MHz
-140
* Insert the voltage here; e.g. for 12.0 Volts supply
package code = EM44_E12
EM44E
310.0MHz
(dBc/Hz)
-60
-120
-125
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk
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