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| VX-702 Voltage Controlled Crystal Oscillator Previous Vectron Model VC-715 VX-702 Description The VX-702 is a Voltage Controlled Crystal Oscillator that operates at the fundamental frequency of the internal fundamental crystal which enables the circuit to achieve low phase jitter performance over a wide operating temperature range. The VX-702 is housed in an industry standard hermetically sealed LCC package and available in tape and reel. Features * * * * * * * * * * Fundamental VCXO with no subharmonics or spurs Low Jitter, sub 1pS performance Output Frequencies from 1.024 MHz to 77.76 MHz 3.3 V Operation LVPECL Output Output Disable Feature Excellent 20ppm temperature stability, 0/70C or -40/85C operating temperature Small Industry Standard Package, 5.0x7.5x1.8mm Product is free of lead and compliant to EC RoHS Directive * * * * * Applications Ideal for PLL circuits for clock smoothing and frequency translation SONET, SDH Synchronous Ethernet Fiber Channel LAN / WAN Test and Measurement Block Diagram Complementary Output Output VDD Crystal Oscillator VC E/D Gnd Vectron International * 267 Lowell Road, Hudson, NH 03051 * Tel: 1-88-VECTRON-1 * http://www.vectron.com Page1 Performance Specifications Table 1. Electrical Performance Parameter Voltage 1 Symbol VDD IDD Min Supply 3.135 Frequency Typical 3.3 Maximum 3.465 65 Units V mA MHz ppm % ppm/V ppm V Current (No Load) Nominal Frequency Linearity3 Gain Transfer Positive (See pg 5) Temperature Stability Output Logic Levels3 Output Logic High Output Logic Low Current Rise Time Fall Time 4 3 3 2 3,6 fN APR Lin KV fSTAB 1.024 50 5 +90 20 Outputs 77.76 10 Absolute Pull Range VOH VOL IOUT tR tF SYM 5 5 VDD-1.025 VDD-1.810 VDD-0.950 VDD-1.700 VDD-0.880 VDD-1.620 20 1 1 mA ns ns % ps ps ps ps 3.0 1 V uA kHz V 0.1*VDD Symmetry3 Jitter (12 kHz - 20 MHz BW)50.00MHz Period Jitter, RMS (50.00 MHz)7 Period Jitter, Peak - Peak (50.00 MHz) Control Voltage Range for APR Control Voltage Input Leakage Control Voltage Modulation BW Output Enabled 8 Output Disabled Operating Temperature Package Size 1] 2] 3] 4] 5] 6] 7] 8] 7 45 50 0.8 1.0 3.0 20 55 J J J J Control Voltage VC IIN BW Jitter (50 kHz - 80 MHz BW) 50.00MHz 0.3 20 Enable/Disable 0.9*VDD 0/70 or -40/85 5.0 x 7.5 x 1.8 100 VIH VIL TOP C mm The VX-702 power supply should be filtered, eg, 0.1 and 0.01uF to ground See Standard Frequencies and Ordering Information tables for more specific information Parameters are tested with production test circuit below (Fig 1). Measured from 20% to 80% of a full output swing (Fig 2). Integrated across stated bandwidth. Tested with Vc = 0.3V to 3.0V unless otherwise stated in part description Broadband Period Jitter measured using Lecroy Wavemaster 8600A 6 GHz Oscilloscope, 25K samples taken Output is Enabled if E/D is left floating Fig 1: Test Circuit tR Fig 2: LVPECL Waveform tF SYM = 100 x tA / tR tA tR Vectron International * 267 Lowell Road, Hudson, NH 03051 * Tel: 1-88-VECTRON-1 * http://www.vectron.com Page2 Outline Drawing & Pad Layout 6 5 4 VX702 YWW XXX.XXXX VDUGLA CCC-CCCC 35.328 XXX.XX XXMXXXX VI VI YWW YWW 1 2 3 Dimensions in inches (mm) Table 2. Pin Out Pin 1 2 3 4 5 6 Symbol VC OE GND Output COutput Function VCXO Control Voltage Enable/Disable Case and Electrical Ground Output Complementary Output Power Supply Voltage (3.3V 10%) VCC Typical Phase Noise Typical Gain VX-702 @ 25.00 MHz 150 180 160 100 140 50 120 0 0 0.5 1 1.5 Vc (volts) 2 2.5 3 100 Gain (ppm/V) Pull Gain -50 80 60 -100 40 -150 20 -200 0 Vectron International * 267 Lowell Road, Hudson, NH 03051 * Tel: 1-88-VECTRON-1 * http://www.vectron.com Page3 Suggested Output Load Configurations The VX-702 incorporates a standard PECL output scheme, which are un-terminated emitters as shown in Figure 3. There are numerous application notes on terminating and interfacing PECL logic and the two most common methods are a single resistor to ground, Figure 4, and a pull-up/pull-down scheme as shown in Figure 5. An AC coupling capacitor is optional, depending on the application and the input logic requirements of the next stage. One of the most important considerations is terminating the Output and Complementary Outputs equally. An unused output should not be left un-terminated, and if it one of the two outputs is left open it will result in excessive jitter on both. PC board layout must take this and 50 ohm impedance matching into account. Load matching and power supply noise are the main contributors to jitter related problems. Figure 3 Standard PECL Output Configuration Figure 4 Single Resistor Termination Scheme Resistor values are typically 120 to 240 ohms Figure 5 Pull-Up Pull-Down Termination Reliability VI qualification includes aging at various extreme temperatures, shock and vibration, temperature cycling, and IR reflow simulation. The VX-702 family is capable of meeting the following qualification tests: Table 3. Environmental Compliance Parameter Mechanical Shock Solderability Gross and Fine Leak Resistance to Solvents Moisture Sensitivity Level Contact Pads Mechanical Vibration Conditions MIL-STD-883, Method 2007 MIL-STD-883, Typical Characteristics - Phase Noise Method 2002 MIL-STD-883, Method 2003 MIL-STD-883, Method 1014 MIL-STD-883, Method 2015 MSL 1 Gold over Nickel Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional operation is not implied at these or any other conditions in excess of conditions represented in the operational sections of this datasheet. Exposure to absolute maximum ratings for extended periods may adversely affect device reliability. Permanent damage is also possible if OD or Vc is applied before Vcc. Table 4. Absolute Maximum Ratings Parameter Power Supply Output Current Voltage Control Range Storage Temperature Soldering Temp/Time Symbol VDD IOUT VC TS TLS Ratings 0 to 6 25 0 to VCC -55 to 125 260 / 40 Unit V mA V C C / sec Although ESD protection circuitry has been designed into the VX-702 proper precautions should be taken when handling and mounting. VI employs a human body model (HBM) and a charged device model (CDM) for ESD susceptibility testing and design protection evaluation. Table 5. ESD Ratings Model Human Body Model Charged Device Model Minimum 500V 500V Conditions MIL-STD-883, Method 3015 JESD22-C101 Vectron International * 267 Lowell Road, Hudson, NH 03051 * Tel: 1-88-VECTRON-1 * http://www.vectron.com Page4 IR IR Reflow Table 6. Reflow Profile Parameter PreHeat Time Ts-min Ts-max Ramp Up Time Above 217 C Time To Peak Temperature Time at 260 C Ramp Down Symbol tS Value 60 sec Min, 180 sec Max 150C 200C 3 C/sec Max 60 sec Min, 150 sec Max 480 sec Max 20 sec Min, 40 sec Max 6 C/sec Max RUP tL TAMB-P tP RDN The device is qualified to meet the JEDEC standard for Pb-Free assembly. The temperatures and time intervals listed are based on the Pb-Free small body requirements. The VX-702 device is hermetically sealed so an aqueous wash is not an issue. Termination Plating: Electroless Gold Plate over Nickel Plate Tape & Reel (EIA-481-2-A) Table 7. Tape and Reel Information Tape Dimensions (mm) Dimension Tolerance VX-702 Reel Dimensions (mm) Po Typ 4 W Typ 16 F Typ 7.5 Do Typ 1.5 P1 Typ 8 A Typ 178 B Min 1.5 C Typ 13 D Min 20.2 N Min 50 W1 Typ 16.4 W2 Max 22.4 # Per Reel 200 Vectron International * 267 Lowell Road, Hudson, NH 03051 * Tel: 1-88-VECTRON-1 * http://www.vectron.com Page5 Table 8. Standard Output Frequencies (MHz) 2.04800 27.00000 50.00000 67.50000 10.00000 27.12000 51.200000 70.00000 10.24000 32.00000 51.84000 75.00000 16.38400 36.00000 54.00000 76.80000 19.44000 38.88000 57.60000 77.76000 21.12000 40.00000 61.44000 78.64320 24.70400 44.43430 62.20800 25.00000 47.85000 62.50000 Ordering Information VX-702- E C E - K X A N - xxMxxxxxxx Product VCXO, 5x7 Package Voltage Options E: +3.3 Vdc 5%, Output C: LVPECL Temp Range T: 0/70C E: -40/85C Absolute Pull Range K: 50ppm *Note: not all combination of options are available. Other specifications may be available upon request. Frequency in MHz Other (Future Use) N: Standard Enable/Disable A: Enable High Stability X: Standard E: 20ppm Temperature Stability Example: VX-702-ECE-KXAN-51M8400000 For Additional Information, Please Contact USA: Vectron International 267 Lowell Road Hudson, NH 03051 Tel: 1.888.328.7661 Fax: 1.888.329.8328 Europe: Vectron International Landstrasse, D-74924 Neckarbischofsheim, Germany Tel: +49 (0) 3328.4784.17 Fax: +49 (0) 3328.4784.30 Asia: Vectron International 1F-2F, No 8 Workshop, No 308 Fenju Road WaiGaoQiao Free Trade Zone Pudong, Shanghai, China 200131 Tel: 86.21.5048.0777 Fax: 86.21.5048.1881 Disclaimer Vectron International reserves the right to make changes to the product(s) and or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. Vectron International * 267 Lowell Road, Hudson, NH 03051 * Tel: 1-88-VECTRON-1 * http://www.vectron.com Rev: 1/10/2009 Page6 |
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