CFPO-20,-21,-22,-23 TC-OCXO 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. 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 OCXOs 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 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. ■ ■ -40 to 85°C < 1.0W < 350mW < 525mW < 600mW ■ 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 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 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 Output Waveform - HCMOS 8.65 max. Outline in mm. tf tr +Vs 90% (VoH-VoL) 0.75 VoH 50% (VoH-VoL) ∅0.48 6.35±0.5 10% (VoH-VoL) 15.24 VoL 0V t T 14 8 Duty cycle = t x 100(%) T 13.08 max 7 7.62 1 12.2±0.2 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 +Vs 1 14 V OCXOs Oscillator 7 8 Cs CL Oscilloscope Frequency Counter CL = Load 15pF (HCMOS or 10kΩ // 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 12.8MHz 10Hz 100Hz 1kHz 10kHz 100kHz -95dBc/Hz -115dBc/Hz -135dBc/Hz -140dBc/Hz -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 5.0V±10% Square HCMOS 15pF VoH >90% Vs VoL < 10% Vs 8ns 8ns 45/55% CFPO-21 10.0 to 33.0MHz 3.3V±5% Clipped Sinewave 10kΩ//10pF Vpk-pk >0.8V - - - CFPO-22 10.0 to 33MHz 5.0V±10% Clipped Sinewave 10kΩ//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 70°C -40 to 85°C Code PS* - Ordering Example Code RS Code RX 14.4MHz CFPO-20 SX A Code SS Code SX ±0.2ppm Code MS Code MX LF OCXOs Frequency Model No. Frequency Stability Vs Operating Temperature Code Frequency Adjustment RoHS Compliance 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