CFPT-9050 Series
ISSUE 6 ; 23 DECEMBER 2004
Recommended for New Designs
Delivery Options
■
Frequency Stability
■
■
■
Temperature: see table
Typical Supply Voltage Variation ±10% < ±0.2 ppm*
Typical Load Coefficient 15pF ±5pF < ±0.2 ppm*
Please contact our sales office for current leadtimes
Description
■
* Depending on frequency and output type
Frequency Adjustment
■
A highly versatile series of surface mountable
14.7 x 9.2 x 6.2mm temperature compensated voltage
controlled crystal oscillators (TCVCXOs) for applications
where small size and high performance are pre-
requisites. This oscillator uses C-MAC’s latest custom
ASIC "Pluto", a single chip oscillator and analogue
compensation circuit, capable of sub 0.3 ppm
performance. Its wide frequency range, operating
temperature range, drive capability, coupled with its
high stability and linear frequency pulling make it the
ideal reference oscillator. Its ability to function down to
a supply voltage of 2.4V and low power consumption
makes it particularly suitable for mobile applications
Three options with external Voltage Control applied to
pad 1:
A - Ageing adjustment: > ±5ppm (Standard Option)
B - No frequency adjustment. Initial calibration @ 25°C
< ±0.5 ppm
C - High Pulling ±10ppm to ±50ppm can be available
depending on frequency and stability options.
Please consult our sales office
■
■
■
■
■
Linearity
Slope
Input resistance
Modulation bandwidth
Standard control voltage ranges:
Without reference voltage
Without reference voltage
With reference voltage
< 1%
Positive
> 100kΩ
> 2kHz
Standard Frequencies
■
9.6, 10.0, 12.8, 19.44, 20.0, 38.88, 49.152, 51.84MHz
Waveform
SURFACE MOUNT
TCXOs
■
Square HCMOS 15pF load
Square ACMOS 50pF max. load
Sinewave 10kΩ // 10pF AC-coupled
,
Clipped sinewave 10kΩ // 10pF AC-coupled
,
- Vs=5.0V 2.5V±2V
- Vs=3.3V 1.65V±1V
- Vc=0V to Vref
■
■
■
Reference Voltage, Vref (HCMOS/ACMOS only)
■
Supply Voltage
■
Optional reference voltage output on pad 5, suitable for
potentiometer supply or DAC reference.
1. No output (standard option)
2. 2.2V, for Min. Vs>2.4V
3. 2.7V, for Min. Vs>3.0V
4. 4.2V, for Min. Vs>4.5V
Maximum load current (mA) = Vref /10
Operating range 2.4 to 6.0V, see table
Current Consumption
■
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, 6 to 12 mA depending on frequency
Clipped Sinewave, Typically
≈
1+Frequency(MHz)*1.2*{Load(pF)+30}*10
-3
mA
■
■
■
For manual frequency adjustment (HCMOS/ACMOS output
only) connect an external 50kΩ potentiometer between
pad 5 (Reference Voltage) and pad 3 (GND) with wiper
connected to pad 1 (Voltage Control). Please specify
reference voltage as a part of the ordering code
Note: Please contact our sales office if a reference voltage
is required in combination with sine or clipped sinewave
output
Tri-state
Package Outline
■
14.7 x 9.2 x 6.2mm SMD
■
Ageing
■
■
■
Pad 2 open circuit or >0.6Vs output enabled
< 0.2Vs Tri-state
When Tri-stated, the output stage is disabled for all
output options, but the oscillator and compensation
circuit are still active (current consumption <1mA)
±1ppm maximum in first year
±3ppm maximum for 10 years
±1ppm maximum after reflow
■
■
Europe Tel: +44 (0)1460 270200
Americas Tel: +1 919 941 9333
Asia
Tel: +86 755 8826 5991
Fax: +44 (0)1460 72578
Fax: +1 919 941 9371
Fax: +86 755 8826 5990
Website: www.cmac.com
Storage Temperature Range
■
Outline in mm
6.2 max
9.2 max
0.70
2.54
0.75
2.54
1.3
1 2 3
Pad Connections
1 Voltage Control
(optional-if not used
do not connect)
2 Tri-state control
3 GND
4 Output
5 Vref(optional-if not used
do not connect)
6 +Vs
8.64
tf
90% (VoH-VoL)
tr
–55 to 125°C
14.7 max
Environmental Specification
■
Vibration: IEC 60068-2-6 Test Fc Procedure B4, 10-60Hz
1.5mm displacement, 60 –2000Hz at 98.1m/s
2
,
30 minutes in each of three mutually perpendicular axes
at 1 octave per minute
Shock: IEC 60068-2-27 Test Ea, 980m/s
2
acceleration for
6ms duration, 3 shocks in each direction along three
mutually perpendicular axes
Soldering: SMD product suitable for Convection Reflow
soldering. Peak temperature 230°C. Maximum time
above 200°C, 90 secs.
Solderabiltiy: MIL-STD-202, Method 208, Category 3
Marking: Laser Marked
■
■
6 5 4
1.50
1.0
5.08
■
■
Marking Includes
■
C-MAC
■
Part Number (E and four digits)
■
Frequency (MHz)
■
Pad 1 / Static sensitivity identifier (Triangle)
■
Date code and manufacturing location code (YYWWL)
CMAC E000
13.0MHZ
1.27
2.54
Output Waveform - HCMOS
+Vs
VoH
SURFACE MOUNT
TCXOs
∆
YYWWL
Minimum Order Information Required
■
Frequency + Model Number + Frequency Stability Vs
Operating Temperature Range Code + Reference Voltage
Code + Frequency Adjustment Code + Lead-free version
code
VoL
t
T
50% (VoH-VoL)
10% (VoH-VoL)
0V
OR
■
Discrete part number for repeat orders (Discrete part
numbers suitable for Lead-free soldering have a
‘LF’suffix, e.g. E3131LF
Please supply full information for non-standard options, if
required
Test Circuit
Tri-state
control
50k
Duty cycle = t x 100(%)
T
1
6
100nF
2
5
3
4
Output
C
L
Voltage
Control
Vs
Europe Tel: +44 (0)1460 270200
Americas Tel: +1 919 941 9333
Asia
Tel: +86 755 8826 5991
Fax: +44 (0)1460 72578
Fax: +1 919 941 9371
Fax: +86 755 8826 5990
Website: www.cmac.com
MicroPython Open Source section
京公网安备 11010802033920号
EEWORLD
