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CX4VCSM3 датащи(PDF) 2 Page - RSG Electronic Components GmbH |
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CX4VCSM3 датащи(HTML) 2 Page - RSG Electronic Components GmbH |
2 / 2 page RSG Electronic Components GmbH - Sprendlinger Landstr. 115 - 63069 Offenbach - Germany - www.rsg-electronic.de YS TEM C ERTIF IC A T 01 10103 - Rev C TERMINATIONS Designation Termination SM1 Gold Plated SM2 Solder Plated SM3 Solder Dipped PACKAGING OPTIONS CX4VSM - Tray Pack - 16mm tape, 7” or 13” reels (Reference tape and reel data sheet 10109) SPECIFICATIONS Specifications are typical at 25 OC unless otherwise noted. Specifications are subject to change without notice. Parameters Fundamental Overtone Frequency, (kHz) 32.768 100 200 Motional Resistance R1(kΩ) 50 18 2.4 Motional Capacitance C1 (fF) 2.3 1.07 2.2 Quality Factor Q (k) 40 85 140 Shunt Capacitance C0 (pF) 1.1 0.7 1.2 Load Capacitance (pF)* 9 8 5 Turning Point ( oC)* 25 10 29 Standard Calibration Tolerance** Glass Lid: 30 ppm 100 ppm 1000 ppm (0.003%) (0.01%) (0.1%) Ceramic Lid: 100 ppm 1000 ppm 10000 ppm (0.01%) (0.1%) (1.0%) Drive Level 0.5 µW MAX Temperature Coefficient (k) -0.035 ppm/ OC2 Note: Frequency f at temperature T is related to frequency f0 at turning point temperature T0 by: Aging, first year 5 ppm Shock, survival 5,000 g peak, 0.3 ms, 1/2 sine Vibration, survival 20 g RMS, 10-2,000 Hz random Operating Temp. Range -10 OC to +70OC (Commercial) -40 OC to +85OC (Industrial) -55 OC to +125OC (Military) Storage Temp. Range -55 OC to +125OC Max Process Temperature 260 OC for 20 sec. * Other values available ** Tighter tolerances available + _ + _ + _ + _ + _ + _ f-f0 = k(T-T0) 2 f0 HOW TO ORDER CX4VSM CRYSTALS CX4V S C SM1 32.768K , 100 / I C = Ceramic Lid Blank = Glass Lid “S” if special or custom design. Blank if standard SM1 = Gold Plated SM2 = Solder Plated SM3 = Solder Dipped Operating Temp. Range: C = -10 OC to +70OC I = -40 OC to +85OC M = -55 OC to +125OC S = Customer Specified Frequency K = kHz Calibration Tolerance @25 OC (in ppm) TYPICAL APPLICATION FOR A PIERCE OSCILLATOR The CX4 family of surface mount crystals are ideal for small, high density, battery operated portable products. The CX4 crystal designed in a Pierce oscillator (single inverter) circuit provides very low current consumption and high stability. A conventional CMOS Pierce oscillator circuit is shown below. The crystal is effectively inductive and in a PI- network circuit with CD and CG provides the additional phase shift necessary to sustain oscillation. The oscillation frequency (f0) is 50 to 150 ppm above the crystal’s series resonant frequency (fS). Drive Level RA is used to limit the crystal’s drive level by forming a voltage divider between RA and CD. RA also stabilizes the oscillator against changes in the amplifiers output resistance (R0). RA should be increased for higher voltage operation. Load Capacitance The CX4 crystal calibration tolerance is influenced by the effective circuit capacitances, specified as the load capacitance (CL). CL is approximately equal to: NOTE: CD and CG include stray layout to ground and CS is the stray shunt capacitance between the crystal terminal. In practice, the effective value of CL will be less than that calculated from CD, CG and CS values because of the effect of the amplifier output resistance. CS should be minimized. The oscillation frequency (f0) is approximately equal to: AMPLIFIER BUFFER C G C D R A CX4 XTAL OSC Freq (f ) O R f CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT f0 = fS [1+ C 1 ] 2(C0 + CL) (2) Where f S = Series resonant frequency of the crystal C1 = Motional Capacitance C0 = Shunt Capacitance CL = CD x CG + CS CD + CG (1) |
Аналогичный номер детали - CX4VCSM3 |
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Аналогичное описание - CX4VCSM3 |
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