vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com VT-820 temperature compensated crystal oscillator previous vectron model vtm3 vectrons VT-820 temperature compensated crystal oscillator (tcxo) is a quartz stabilized, clipped sine wave output, analog temperature compensated oscillator, operating o either 1.8, 2.8, 3.0 or 3.3 volt supply, hermetically sealed 3.2x2.5 ceramic package . ? 0.5pmm temperature stability clipped sine wave output ? output frequencies to 45 mhz ? fundamental crystal design ? optional vcxo function available ? hermetically sealed ceramic smd package ? product is compliant to rohs directive ? and fully compatible with lead free assembly gps ? wimax, wi-fi,wi-lan ? seismic exploration ? wireless communications ? base stations ? point to point radios ? broadband access ? test equipment ? handsets ? features applications block diagram description VT-820 page1 v dd output vcontrol or nc gnd analog temperature comp. crystal
vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com description page2 dimensions in mm performance speci cations table 1. electrical performance parameter symbol min. typ max units output frequency f o 845mhz supply voltage, 1 (ordering option) v dd +1.8, 2.8, +3.0 or +3.3 v supply current, 8 to 19.999mhz 20.000 to 31.9999mhz 32.000 to 45.000mhz i dd 1.5 2.0 2.5 ma operating temperature, (ordering option) t op 0/55, -10/60, -20/70, -30/80, -30/85, -40/85 c stability over t op , (ordering option) 0.5, 1.0, .5, 2.0, 2.5, 3.0, 4.0, 5.0 ppm initial accuracy, no adjust option 1.0 ppm power supply stability 0.2 ppm load stability 0.2 ppm aging 1.0 ppm/yr pull range, (ordering option) tpr 5, 8, 10, 12, 15 ppm control voltage to reach pull range 1.8v option 0.5 0.3 2.5 1.5 v v control voltage impedance 500 kohm output level 2 v o p/p 0.8 v output load 10k ii 10pf phase noise, 10.000mhz 10hz 100hz 1khz 10khz 100khz -91 -116 -137 -149 -150 dbc/hz start up time 10 ms 1. the VT-820 power supply pin should be ltered, eg, a 0.1 and 0.01uf capacitor 2. the output is dc coupled table 2. pinout pin # symbol function 1v c tcxo control voltage or ground 2,5,7,8 tcxo prog tcxo programming, do not connect 3 gnd electrical and lid ground 4f o output frequency 6v dd supply voltage speci cations outline drawing recommended pad layout 5 123 78 64 2.50.1 3.20.1 1.600.1 2.50.1 0.90.1 0.450.1 0.60.1 1.30.1 0.080.1 1.270.1 1.320.1 1.020.1 1.00.1 0.80.1 frequency date code
vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com page3 vcxo feature: the VT-820 can be ordered with a vcxo function for applications were it will be used in a pll, or the output frequency needs ne tune or calibration adjustments. this is a high impedance input, 500kmohm, and can be driven with an op- amp or terminated with adjustable resistors etc. pin 1 should not be left oating on the vcxo optional device. no adjust option: in applications were the VT-820 will not be used in a pll, or the output frequency does not need ne tune adjustments, the best device to use would be a VT-820-xxx-xxx0. by using the no adjust option, the circuit is simpli ed as vc does not need to be adjusted or set to a predetermined voltage and pin 1 should be grounded (pin 1 can be left open but should not be set to a voltage such as an rf signal or power supply voltage. s vcxo function table 3. pinout pin # symbol function 1v c tcxo control voltage or ground 2 gnd electrical and lid ground 3f o output frequency 4v dd supply voltage outline drawing recommended pad layout maximum ratings absolute maximum ratings and handling precautions stresses in excess of the absolute maximum ratings can permanently damage the device. functional operation is not implied or any other excess of conditions represented in the operational sections of this data sheet. exposure to absolute maximum ratings for extended periods may adversely a ect device reliability. although esd protection circuitry has been designed into the VT-820, proper precautions should be taken when handling and mounting, vi employs a human body model and charged device model for esd susceptibility testing and design evaluation. esd thresholds are dependent on the circuit parameters used to de ne the model. although no industry standard has been adopted for the cdm a standard resistance of 1.5kohms and capacitance of 100pf is widely used and therefor can be used for comparison purposes. s table 4. maximum ratings parameter symbol rating unit storage temperature t store -40/85 oc supply voltage v dd 6v control voltage v c 0/v dd v esd, human body model 1000 v esd, charged device model 1000 v 12 3 4 2 1 3 4 2.50.2 3.20.2 1.0 max 0.550.1 0.65 0.85 1.95 package drawing for the 0.5ppm over -30/80c and <2ppm over -40/85c stability options and 1.8v option. frequency date code 2.60 1.25 1.00.1 1.65
vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com page4 reliability the table 5. environmental compliance parameter condition mechanical shock mil-std-883 method 2002 mechanical vibration mil-std-883 method 2007 temperature cycle mil-std-883 method 1010 solderability mil-std-883 method 2003 f i n e a n d g r o s s l e a k fine and gross leak mil-std-883 method 1014 resistance to solvents mil-std-883 method 2015 m o i s t u r e s e n s i t i v i t y l e v e l moisture sensitivity level msl1 contact pads gold over nickel table 6. re ow pro le parameter symbol value preheat time ts-min ts-max t s 200 sec max 150c 200c ramp up r up 3oc/sec max time above 217c t l 150 sec max time to peak temperature t 25c to peak 480 sec max t i m e a t 2 6 0 c time at 260c t p 10 sec max time at 240c t p2 60 sec max suggested ir pro le devices are built using lead free epoxy and can be subjected to standard lead free ir re ow conditions shown in table 5. contact pads are gold over nickel and lower maximum temperatures can also be used, such as 220c. s ir re ow tape & reel table 7. tape and reel information tape dimensions (mm) reel dimensions (mm) w f do po p1 a b c d n w1 w2 #/reel 18 1.75 1.55 4 4 178 2.5 13 22 60 11.5 15 1000
vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? http://www.vectron.com page5 table 8. standard frequencies (mhz) 8.1920 10.000 10.250 12.000 12.800 13.000 13.568 14.000 14.7456 15.360 15.000 16.000 16.3670 16.366667 16.367667 16.367673 16.368 16.369 16.736 16.800 19.200 19.392658 19.440 19.6608 19.680 20.000 20.7360 22.000 23.104 24.5535 25.000 26.000 27.000 27.4560 30.150 30.400 30.720 31.7967590 37.800 38.400 39.000 40.000 41.4720 45.000 ordering information 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. rev: 10/21/2009 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 VT-820- e f g - 206 a- xxmxxxxxxx product tcxo voltage options , e: +3.3 vdc 5%, f: +3.0 vdc 5% g: +2.8 vdc 5% j: +1.8 vdc 5% output f: clipped sine wave stability 507: 0.5ppm 106: 1ppm 156: 1.5ppm 206: 2.0ppm 256: 2.5ppm 306: 3.0ppm 356: 3.5ppm 406: 4.0ppm 506: 5.0ppm frequency in mhz *note: not all combination of options are available. other speci cations may be available upon request. temp range r: 0 /55c k: -10/60c j: -20/70c g: -30/80c h: -30/85c e: -40/85c tuning 0: fixed, no tuning a: 5ppm b: 8ppm c: 10ppm d: 12ppm e: 15ppm package 2.5x3.2 example: VT-820-efg-206a-19m200000
|
