CFPT-9000 Series
ISSUE 9 ; 3 MARCH 2005
Recommended for New Designs
Delivery Options
I
Ageing
I
I
I
I
I
±1ppm maximum in first year, frequency < 20MHz
±2ppm maximum in first year, frequency > 20MHz
±3ppm maximum for 10 years, frequency < 20MHz
±5ppm maximum for 10 years, frequency > 20MHz
±1ppm maximum after reflow
Please contact our sales office for current leadtimes
Description
I
A series of surface mountable 7.0
×
5.0mm temperature
compensated voltage controlled crystal oscillators
(TCVCXOs) for medium to high volume 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 1 ppm
performance over an extended temperature range. Its
ability to function down to a supply voltage of 2.4V and
low power consumption make it particularly suitable for
mobile applications
Frequency Stability
I
I
I
Temperature: see table
Typical Supply Voltage Variation ±10% < ±0.2 ppm*
Typical Load Coefficient 15pF ±5pF < ±0.2 ppm*
*Dependent on frequency and output type
Frequency Adjustment
I
RoHS compliance
I
Three options with external Voltage Control applied to
pad 10:
A - Ageing adjustment: > ±5ppm, frequency < 20MHz
(Standard Option)
> ±7ppm, frequency > 20MHz
B - No frequency adjustment initial calibration @ 25°C
< ±1.0 ppm
C - High Pulling ±10ppm to ±50ppm can be available
depending on frequency and stability options.
Please consult our sales office
SURFACE MOUNT
TCXOs
Parts with the suffix ‘LF’ on the ordering code and part
number are fully compliant with the European Union
directive 2002/95/EC on the restriction of the use of
certain hazardous substances in electrical and
electronic equipment. Note: The RoHS compliant parts
are suitable for assembly using both Lead-free solders
(see Lead-free Reflow soldering profile) and Tin / Lead
solders (see Tin / Lead Reflow soldering profile).
I
I
I
I
I
Standard Frequencies
I
Linearity
Slope
Input resistance
Modulation bandwidth
Standard voltage control ranges:
Without reference voltage
< 1%
Positive
> 100kΩ
> 2kHz
3.2, 5.0, 6.4, 8.192, 9.6, 12.688375, 10.0, 12.8, 13.0, 14.4,
14.85, 16.384, 16.367, 16.8, 19.2, 19.44, 19.8, 20.0,
24.5535, 32.768, 38.88, 40.0MHz
Output Waveform
I
I
Square HCMOS 15pF load
Square ACMOS 50pF max. load
(available on request, contact sales office)
Sinewave 10kΩ // 10pF AC-coupled
,
Clipped sinewave 10kΩ // 10pF AC-coupled
,
I
- Vs=5.0V 2.5V±1V
- Vs=3.3V 1.65V±1V
- Vc=0V to Vref
Without reference voltage
With reference voltage
Reference Voltage, Vref
I
I
Supply Voltage
I
Optional reference voltage output on pad 1, 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
I
HCMOS Typically
≈
1+Frequency(MHz)*Supply(V)*{Load(pF)+15}*10-3 mA
e. g. 20MHz, 5V, 15pF
≈
4mA
Sinewave, < 8mA
Clipped Sinewave Typically
≈
1+Frequency(MHz)*1.2*{Load(pF)+30}*10-3mA
I
I
Package Outline
I
For manual frequency adjustment connect an external
50kΩ potentiometer between pad 1 (Reference Voltage)
and pad 4 (GND) with wiper connected to pad 10 (Voltage
Control). Please specify reference voltage as part of the
ordering code
7.0 x 5.0 x 2.0mm SMD Ceramic Carrier
248
www.cmac.com
Tri-state
I
I
I
Solder pad layout
< 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)
2.03
2.54
5.08
7.11
2.54
Storage Temperature Range
I
–55 to 125°C
Outline in mm
5.0 ± 0.15
Environmental Specification
I
Vibration: IEC 60068-2-6 Test Fc Procedure B4, 10-60Hz
1.5mm displacement, 60 –2000Hz at 10gn, 30 minutes in
each of three mutually perpendicular axes at 1 octave
per minute
Shock: IEC 60068-2-27 Test Ea, 1500gn acceleration for
0.5ms duration, half sine pulse, 3 shocks in each
direction along three mutually perpendicular axes
Soldering: SMD product suitable for Convection Reflow
soldering. See recommended reflow profiles
Solderabiltiy: MIL-STD-202, Method 208, Category 3
Marking: Laser Marked
0.8
1.27
5
4
6 7 8
3 21
0.6
9
10
0.80
I
2.03
7.0 ± 0.15
2.0 max
I
I
I
1.0
1.27
Marking Includes
1.00
I
I
I
I
I
Pad Connections
1. V ref
2. N/C
3. DC Coupled Output
(do not connect)
4. GND
5. Output
6. N/C
7. N/C
8. Tri-state Control (Enable)*
9. +Vs
10.Voltage Control*
*leave unconnected if not
required.
2.54
SURFACE MOUNT
TCXOs
C-MAC
Manufacturing identifier (xx)
Pad 1 / Static sensitivity identifier (Triangle)
Part Number (Four digits)
Device date code (YW)
CMAC xx
∆
0000 YW
Output Waveform - HCMOS
t
f
t
r
+Vs
VoH
Minimum Order Information Required
I
90% (VoH-VoL)
Frequency + Model Number + Frequency Stability Vs
Operating Temperature Range Code + Reference Voltage
Code + Frequency Adjustment Code + RoHS compliance
code ‘LF’
0.81
50% (VoH-VoL)
10% (VoH-VoL)
Pad 8 open circuit or >0.6Vs output enabled
2.54
0.63
OR
I
Discrete part number for repeat orders (Discrete part
numbers suitable for Lead-free soldering include the
RoHS compinace code ‘LF’ as a suffix, e.g. E2747LF)
VoL
t
T
0V
Please supply full information for non-standard options, if
required.
Test Circuit
Duty cycle = t x 100(%)
T
50kΩ
1
10
9
100nF
Voltage
Control
Vs
2
8
3
7
4
5
6
Output
C
L
100nF
Tri-state
control
249
www.cmac.com
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
