CFPT-9025 Series High Performance TCXO/TCVCXO
ISSUE 3; 1 FEBRUARY 2006
Package Outline
■
Recommended for New Designs
Delivery Options
■
Low Profile, 7.6 x 9.3 x 3.2 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
±5ppm maximum for 10 years
The CFPT-9025 series of temperature compensated
crystal oscillators provide for ultra high stabilities down
to ±0.3ppm and operating temperature ranges as wide as
–55 to +125°C. The oscillator uses C-MAC’s latest custom
ASIC "Pluto", a single chip oscillator and analogue
compensation circuit. Due to its unique mechanical
construction the CFPT-9025 series is able to withstand
20,000 G’s acceleration, which makes it the TCXO of
choice for gun hardened GPS navigation systems
Frequency Stability
■
■
■
Temperature: see table
Typical Supply Voltage Variation ±10% < ±0.2 ppm
Typical Load Coefficient ±10%
< ±0.1 ppm
Frequency Adjustment
■
Standard Frequencies
■
Three options with external Control Voltage applied to
pad 1:
A - Ageing adjustment: > ±5ppm (Standard Option)
B - No frequency adjustment initial calibration @ 25°C
< ±0.5 ppm
SURFACE MOUNT
TCXOs
9.6, 10.0, 11.68, 12.504, 12.8, 13.0, 14.4, 16.3676, 19.44,
20.0, 21.73875, 24.5535, 38.88, 40.96, 47.032, 49.152,
51.84 MHz
Non-standard Frequencies in the range 1.0 MHz to 75.0 MHz
(see table) are available on request, contact sales office.
Output Waveform
■
■
■
■
C - High Pulling ±10ppm to ±50ppm and non-standard
control voltage ranges may be available depending
on frequency and stability options. Please consult
our sales office
■
■
■
■
■
Square HCMOS 15pF load
Square ACMOS 50pF max. load
Sinewave >1.0pk-pk, 10kΩ // 10pF load
Clipped sinewave >0.81Vpk-pk, 10kΩ // 10pF load
Linearity
Slope
Input resistance
Modulation bandwidth
Standard control voltage ranges:
Without reference voltage
Without reference voltage
< 1%
Positive
> 100kΩ
> 2kHz
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
Supply Voltage
■
- Vs=5.0V Vc=2.5V±2V
- Vs=3.3V Vc=1.65V±1V
- Vc=0V to Vref
With reference voltage
Reference Voltage, Vref
■
3.3 and 5.0V, see table, non-standard supply voltages in
the range 2.4 to 6.0V are available on request, contact
sales office
Current Consumption
■
Optional reference voltage output on pad 2, suitable for
potentiometer supply or DAC reference.
1. No output (Standard option)
2. 2.2V, for Min. Vs>2.4V
3. 2.75V, for Min. Vs>3.0V
4. 4.2V, for Min. Vs>4.5V
Maximum load current 100µA
HCMOS Typically
≈
1+Frequency(MHz)*Supply(V)*{Load(pF)+15}*10
-3
mA
E. g. 20MHz, 5V, 15pF
≈
4mA
ACMOS Typically
≈
1+Frequency(MHz)*Supply(V)*{Load(pF)+23}*10
-3
mA
Sinewave < 8 mA
Clipped Sinewave Typically
≈
1+Frequency(MHz)*1.2*{Load(pF)+30}*10
-3
mA
■
■
■
For manual frequency adjustment connect an external
50kΩ potentiometer between pad 2 (Reference Voltage)
and pad 3 (Ground) with wiper connected to pad 1
(Voltage Control). Please specify reference voltage as a
part of the ordering code
Tri-state
■
■
Outline in mm
Pad 5 open circuit or >0.6Vs output enabled
Pad 5 < 0.2Vs Tri-state
9.3 max
Pad Connections
1. Voltage Control*
2. Vref*
3. GND
4. Output
5. Tri-state Control (Enable)*
6. +Vs
*Leave unconnected if
not required
When Tri-stated, the output stage is disabled for all output
options, but the oscillator and compensation circuit are
still active (Current consumption <1mA)
Storage Temperature Range
■
–55 to 125°C
■
■
■
■
C-MAC
Pin 1 / Static sensitivity identifier (Triangle)
Part Number (E and Four digits)
Device date code / Location (YWL)
0.81 (x6)
±0.15
2.03
±0.15
CMAC YWL
∆
E2795
1
2
3
Environmental Specification
■
6
5
4
SURFACE MOUNT
TCXOs
To be discussed on an individual basis, contact sales
office
5.08
Minimum Order Information Required
■
Output Waveform - HCMOS
t
f
90% (VoH-VoL)
t
r
+Vs
VoH
Frequency + Model Number + Frequency Stability vs
Operating Temperature Range Code + Reference Voltage
Code + Frequency Adjustment Code
OR
■
Discrete part number for repeat orders
50% (VoH-VoL)
Please supply full information for non-standard options, if
required
1.52 (x5)
±0.15
3.2 max
Marking Includes
7.6 max
10% (VoH-VoL)
VoL
0V
t
T
260°C max
Reflow Solder Profile
Temperature
260
220
180
150
120
50k
Ω
Duty cycle = t x 100(%)
T
Test Circuit
0
120sec
max
10sec
60sec max
Time
Voltage
Control
1
6
Vs
100nF
2
3
5
4
100nF
Output
Tri-state
control
C
L
360 sec max.
Analog electronics
京公网安备 11010802033920号
EEWORLD
