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
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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
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HCMOS only: 5, 6.4, 8, 8.192MHz
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HCMOS & Clipped Sinewave 10.0, 12.8, 16.0, 16.384
and 20.0MHz
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Other frequencies in the range 1.25 to 33MHz may be
available upon request
Waveform
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Standard
Square HCMOS 15pF load
Clipped Sinewave 10k
Ω // 10pF, AC-coupled
■
Optional
Square ACMOS 50pF max. load
Sinewave 10k
Ω // 10pF, DC-coupled
Supply Voltage
■
Operating range 3.3V or 5.0V, see table.
Input Power
-20 to 70°C
-40 to 85°C
■
Warm-up
< 1.0W
< 1.0W
■
Steady state @ 25°C
< 270mW
< 350mW
■
Steady state @ -20°C
< 400mW
< 525mW
■
Steady state @ -40°C
< 600mW
Warm-up time to reach ±0.01ppm of final frequency
■
< 30 secs. (@25°C)
Ageing
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±1ppm maximum in first year, frequency < 20MHz
■
±2ppm maximum in first year, frequency > 20MHz
■
±3ppm maximum for 10 years, frequency < 20MHz
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±5ppm maximum for 10 years, frequency > 20MHz
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±1ppm maximum after reflow
Frequency Stability
■ Temperature: see table
■
Supply Voltage Variation, ±5% ±0.1ppm typ.
■
Load Coefficient, 15pF ±5pf (HCMOS) or 10k
Ω // 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
> 100k
Ω
■ Modulation Bandwidth
> 2kHz
■ Standard control voltage range 1.5V±1V
B
Ageing adjustment by means of an external 100k
Ω
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
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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.
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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)
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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
Marking, includes
■
CMAC
■
Part number (Pxxxx)
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Pad 1 / Static sensitivity
identifier (triangle)
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Device date / location code
(YYWWL)
Package
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Hermetically sealed, industry standard, DIL 14/4
leaded package
Europe
Tel: +44 (0)1460 270200
Fax: +44 (0)1460 72578
Website: www.cmac.com
Americas Tel: +1 919 941 9333
Fax: +1 919 941 9371
Asia
Tel: +86 755 8826 5991
Fax: +86 755 8826 5990
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