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CX1SCSM3-1.0K500/C Ver la hoja de datos (PDF) - RSG Electronic Components GmbH

Número de piezacomponentes DescripciónFabricante
CX1SCSM3-1.0K500/C 530 kHz to 2.1 MHz Low Profile, Miniature Surface Mount Quartz Crystal RSG
RSG Electronic Components GmbH RSG
CX1SCSM3-1.0K500/C Datasheet PDF : 2 Pages
1 2
SPECIFICATIONS
TYPICAL APPLICATION
FOR A PIERCE OSCILLATOR
Specifications are typical at 25OC unless otherwise noted.
Specifications are subject to change without notice.
Parameters
Fundamental
Overtone
Frequency Range, (Hz)
555 k 614 k 1.0 M 1.4 M1.8432 M 2.1M
Motional Resistance,R1() 600 275 500 775 300 475
Motional Resistance,R1 MAX
3 k
Motional Capacitance,C1 (fF) 2.5 3.6 2.0 1.5 2.8 2.6
Quality Factor, Q (k)
170 260 190 100 110 70
Shunt Capacitance,C0 (pF) 1.2 1.3 1.1 1.0 1.3 1.3
Calibration Tolerance*
+_ 500 ppm (0.05%)
+_ 1000 ppm (0.1%)
Drive Level
+_ 10000 ppm (1.0%)
3 µW MAX
Load Capacitance**
7 pF
Turning Point (T0)**
35OC
Temperature Coefficient (k) -0.035 ppm/OC2
Note: Frequency f at temperature T is related to frequency f0
at turning point temperature T0 by:
f-f0
f0
=
k(T-T0)2
Function Mode
Extensional
Aging, first year
5 ppm MAX
Shock, survival
Vibration, survival
750 g peak, 0.3 ms, 1/2 sine
10 g RMS, 20-1,000 Hz random
Operating Temp. Range
-10OC to +70OC (Commercial)
-40OC to +85OC (Industrial)
-55OC to +125OC (Military)
Storage Temp. Range
-55OC to +125OC
Max Process Temperature 260OC for 20 sec.
*Tighter tolerances available.
** Other values available.
TERMINATIONS
Designation
SM1
SM2
SM3
Termination
Gold Plated
Solder Plated
Solder Dipped
PACKAGING OPTIONS
The low profile CX miniature surface mount crystal is ideal
for small, high density, battery operated portable products.
The CX 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 15 to 250 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 CX crystal calibration tolerance is influenced by the
effective circuit capacitances, specified as the load
capacitance (CL). CL is approximately equal to:
CL
=
CD
CD
x
+
CG +
CG
CS
(1)
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:
[ ] f0 = fS
1+ C1
2(C0 + CL)
(2)
Where
fS = Series resonant frequency of the crystal
C1 = Motional Capacitance
C0 = Shunt Capacitance
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
Rf
CX1SM - Tray Pack
BUFFER
- Tape and Reel
(Reference tape and reel data sheet 10109)
HOW TO ORDER CX1SM CRYSTALS
AMPLIFIER
RA
OSC
Freq (fO)
CX1 S
C SM1
1.0M, 500 / M
Blank = Glass Lid
C = Ceramic Lid
“S” if special or
custom design.
Blank if Std.
SM1 = Gold Plated
SM2 = Solder Plated
SM3 = Solder Dipped
Frequency
K = kHz
M = MHz
Calibration
Tolerance
@ 25OC
Operating Temp. Range:
C = -10OC to +70OC
I = -40OC to +85OC
M = -55OC to +125OC
S = Customer Specified
CG
CX1
XTAL
CD
(in ppm)
RSG Electronic Components GmbH - Sprendlinger Landstr. 115 - 63069 Offenbach - Germany - www.rsg-electronic.de
10129 - Rev B
YSTEM CERTIFICA T
01
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