CFPT-9025 Series High Performance TCXO/TCVCXO
ISSUE 3; 1 FEBRUARY 2006
Recommended for New Designs
Delivery Options
Package Outline
■
Low Profile, ꢀ6 x 9ꢀ. x .ꢀ2 mm SMD package with High
Temperature Co-fired Ceramic base and metal cover
■
Please contact our sales office for current leadtimes
Ageing
■
Description
1ppm maximum in first year
■
The CFPT-9025 series of temperature compensated
■
5ppm maximum for 10 years
crystal oscillators provide for ultra high stabilities down
to 0ꢀ.ppm and operating temperature ranges as wide as
–55 to +125°CꢀThe oscillator uses C-MAC’s latest custom
ASIC "Pluto", a single chip oscillator and analogue
compensation circuitꢀ Due to its unique mechanical
construction the CFPT-9025 series is able to withstand
20,000 G’s acceleration, which makes it theTCXO of
choice for gun hardened GPS navigation systems
Frequency Stability
■
Temperature: see table
■
Typical Supply Voltage Variation 10%
Typical Load Coefficient 10%
<
<
0ꢀ2 ppm
0ꢀ1 ppm
■
Frequency Adjustment
■
Three options with external Control Voltage applied to
pad 1:
Standard Frequencies
■
9ꢀ6, 10ꢀ0, 11ꢀ68, 12ꢀ504, 12ꢀ8, 1.ꢀ0, 14ꢀ4, 16ꢀ.676, 19ꢀ44,
A - Ageing adjustment: > 5ppm (Standard Option)
B - No frequency adjustment initial calibration @ 25°C
20ꢀ0, 21ꢀ7.875, 24ꢀ55.5, .8ꢀ88, 40ꢀ96, 4 ꢀ0.2, 49ꢀ152,
51ꢀ84 MHz
<
0ꢀ5 ppm
Non-standard Frequencies in the range 1ꢀ0 MHz to 75ꢀ0 MHz
(see table) are available on request, contact sales officeꢀ
C - High Pulling 10ppm to 50ppm and non-standard
control voltage ranges may be available depending
on frequency and stability optionsꢀ Please consult
our sales office
Output Waveform
■
Square HCMOS 15pF load
■
■
■
■
■
Linearity
< 1%
■
Square ACMOS 50pF maxꢀ load
Slope
Positive
> 100kΩ
> 2kHz
■
Sinewave >1ꢀ0pk-pk, 10kΩ // 10pF load
Input resistance
Modulation bandwidth
Standard control voltage ranges:
■
Clipped sinewave >0ꢀ81Vpk-pk, 10kΩ // 10pF load
Sinewave and clipped sinewave signals are superimposed
on a DC offset, to remove this offset insert an external
coupling capacitor in series with the output
Without reference voltage - Vs=5ꢀ0V Vc=2ꢀ5V 2V
Without reference voltage - Vs=.ꢀ.V Vc=1ꢀ65V 1V
Supply Voltage
With reference voltage
- Vc=0V to Vref
■
.ꢀ. and 5ꢀ0V, see table, non-standard supply voltages in
Reference Voltage, Vref
the range 2ꢀ4 to 6ꢀ0V are available on request, contact
sales office
■
Optional reference voltage output on pad 2, suitable for
potentiometer supply or DAC referenceꢀ
Current Consumption
1ꢀ No output (Standard option)
2ꢀ 2ꢀ2V, for Minꢀ Vs>2ꢀ4V
■
HCMOSTypically
1+Frequency(MHz)*Supply(V)*{Load(pF)+15}*10 mA
Eꢀ gꢀ 20MHz, 5V, 15pF 4mA
≈
-.
.ꢀ 2ꢀ75V, for Minꢀ Vs>.ꢀ0V
4ꢀ 4ꢀ2V, for Minꢀ Vs>4ꢀ5V
≈
■
ACMOSTypically
≈
-.
1+Frequency(MHz)*Supply(V)*{Load(pF)+2.}*10 mA
Maximum load current 100µA
For manual frequency adjustment connect an external
50kΩ potentiometer between pad 2 (Reference Voltage)
and pad . (Ground) with wiper connected to pad 1
(Voltage Control)ꢀ Please specify reference voltage as a
part of the ordering code
■
■
Sinewave < 8 mA
Clipped SinewaveTypically
1+Frequency(MHz)*1ꢀ2*{Load(pF)+.0}*10 mA
≈
-.