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CFPO-22

Description
high stability crystal oscillators
File Size60KB,3 Pages
ManufacturerETC2
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CFPO-22 Overview

high stability crystal oscillators

CFPO-20,-21,-22,-23 TC-OCXO
ISSUE 2; 20 APRIL 2006
Preliminary Specification
Recommended for new designs
Delivery Options
Please contact our sales office for current leadtimes
Description
A series of high stability crystal oscillators, using a
hybrid combination of oven control and temperature
compensation capable of sub 0.05ppm stability. By
using a loosely controlled miniature oven that is
thermally isolated from the ambient the frequency
stability of a crystal oscillator is enhanced. Stability is
further improved by compensating the residual
frequency error with C-MAC’s proprietary ASIC “Pluto”
,
a single chip oscillator with analogue compensation
circuit. The combination of these two functions result in
an oscillator with the best stability / power consumption
ratio and fast warm-up, making it particularly suitable
for battery powered applications
Standard Frequencies
HCMOS only: 5, 6.4, 8, 8.192MHz
HCMOS & Clipped Sinewave 10.0, 12.8, 16.0, 16.384
and 20.0MHz
Other frequencies in the range 1.25 to 33MHz may be
available upon request
Waveform
Standard
Square HCMOS 15pF load
Clipped Sinewave 10kΩ
//
10pF AC-coupled
,
Optional
Square ACMOS 50pF max. load
Sinewave 10kΩ // 10pF DC-coupled
,
Supply Voltage
Operating range 3.3V or 5.0V, see table.
Input Power
Warm-up
Steady state @ 25°C
Steady state @ -20°C
Steady state @ -40°C
-20 to 70°C
< 1.0W
< 270mW
< 400mW
-40 to 85°C
< 1.0W
< 350mW
< 525mW
< 600mW
Frequency Stability
Temperature: see table
Supply Voltage Variation, ±5% ±0.1ppm typ.
Load Coefficient, 15pF ±5pf (HCMOS) or 10kΩ // 10pF
±10% (clipped sinewave) ±0.1ppm typ.
Frequency Adjustment, three options
A Ageing adjustment by means of external Voltage Control
applied to pad 1 (standard option)
Range (frequency < 20MHz) > ±5ppm
Range (frequency > 20MHz) > ±7ppm
Linearity
< 0.5%
Slope
Positive
Input Resistance
> 100kΩ
Modulation Bandwidth
> 2kHz
Standard control voltage range 1.5V±1V
B Ageing adjustment by means of an external 100kΩ
potentiometer connected as a variable resistor from
pad 1 to ground.
Range (frequency < 20MHz)
> ±5ppm
Range (frequency > 20MHz)
> ±7ppm
C No frequency adjustment
Initial calibration
< ±0.5ppm
Storage Temperature Range
-55 to 125°C
Environmental Specification
Vibration: IEC 60068-2-6, test Fc: 10-60Hz 0.75mm
displacement, 60-2000Hz 100m/s2 (10gn) acceleration,
4 hours in each of three mutually perpendicular axes at
1 octave per minute.
Mechanical Shock: IEC 60068-2-27, test Ea; 1000m/s2
(100gn) acceleration for 6ms duration, Half sine pulse,
3 shocks in each direction along three mutually
perpendicular axes (18 shocks total)
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 and Lead/Tin
solders.
Marking: Laser Marked
OCXOs
Warm-up time to reach ±0.01ppm of final frequency
< 30 secs. (@25°C)
Ageing
±1ppm
±2ppm
±3ppm
±5ppm
±1ppm
maximum
maximum
maximum
maximum
maximum
in first year, frequency < 20MHz
in first year, frequency > 20MHz
for 10 years, frequency < 20MHz
for 10 years, frequency > 20MHz
after reflow
Marking, includes
CMAC
Part number (Pxxxx)
Pad 1 / Static sensitivity
identifier (triangle)
Device date / location code
(YYWWL)
Package
Hermetically sealed, industry standard, DIL 14/4
leaded package
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

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