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| 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 10k // 10pF AC-coupled , Optional Square ACMOS 50pF max. load Sinewave 10k // 10pF DC-coupled , Supply Voltage Operating range 3.3V or 5.0V, see table. Input Power Warm-up Steady state @ 25C Steady state @ -20C Steady state @ -40C -20 to 70C < 1.0W < 270mW < 400mW -40 to 85C < 1.0W < 350mW < 525mW < 600mW Frequency Stability Temperature: see table Supply Voltage Variation, 5% 0.1ppm typ. Load Coefficient, 15pF 5pf (HCMOS) or 10k // 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 Modulation Bandwidth > 2kHz Standard control voltage range 1.5V1V B Ageing adjustment by means of an external 100k 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 125C 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. (@25C) 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 Outline in mm. 8.65 max. Output Waveform - HCMOS tf 90% (VoH-VoL) tr +Vs VoH 0.75 50% (VoH-VoL) 0.48 6.350.5 10% (VoH-VoL) VoL t T 13.08 max 1 7 7.62 Duty cycle = t x 100(%) T 0V 15.24 14 8 12.20.2 20.7 max Pin Function 1. Frequency Adjust (leave unconnected in case the 'no frequency adjust' option has been ordered) 7. GND 8. Output 14. +Vs Test Circuit Voltage * Control or A Oscillator 1 14 7 8 OCXOs +Vs V Cs CL Oscilloscope Frequency Counter CL = Load 15pF (HCMOS or 10k // 10pF (Clipped Sinewave), inclusive of probe and jig capacitance. Cs = 100nF *The GND of the control voltage needs to be connected directly to pin 7 as ground lead impedance may cause performance degradation 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 Phase Noise (typical figures) Frequency offset from carrier Frequency 10Hz 12.8MHz -95dBc/Hz 100Hz -115dBc/Hz 1kHz -135dBc/Hz 10kHz -140dBc/Hz 100kHz -145dBc/Hz Electrical Specification - limiting values when measured in test circuit Frequency Range Supply Voltage Output Waveform Output Levels Rise Time (tr) Fall Time (tf) Duty Cycle Model Number 1.25 to 33.0MHz 3.3V 5% Square HCMOS 15pF VoH >90% Vs VoL < 10% Vs 7ns 7ns 45/55% CFPO-20 1.25 to 33.0MHz 5.0V10% Square HCMOS 15pF VoH >90% Vs VoL < 10% Vs 8ns 8ns 45/55% CFPO-21 10.0 to 33.0MHz 3.3V5% Clipped Sinewave 10k//10pF Vpk-pk >0.8V - - - CFPO-22 10.0 to 33MHz 5.0V10% Clipped Sinewave 10k//10pF Vpk-pk >0.8V - - - CFPO-23 Frequency Stability Available Over Operating Temperature Ranges Frequency Stability Vs Operating Temperature Range Operating Temperature Ranges 0.025ppm 0.05ppm 0.1ppm -20 to 70C -40 to 85C Ordering Example Frequency Model No. Frequency Stability Vs Operating Temperature Code Frequency Adjustment RoHS Compliance OCXOs 0.2ppm Code MS Code MX Code PS* - Code RS Code RX 14.4MHz CFPO-20 SX A LF Code SS Code SX Note: * Codes may not be available for all frequencies Minimum Order Information Required Frequency + Model Number + Frequency Stability vs Operating Temperature Range Code + Frequency Adjustment Code + RoHS Compliance Code OR Discrete Part Number (suffix `LF' signifies RoHS compliance) Custom Specification Non-standard requirements like high drive ACMOS output, low harmonic sinewave output, different supply and control voltages, high frequency pulling, different stabilities and temperature ranges may be available upon request. Please contact our sales office to discuss your requirements 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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