CX103 datasheet(2/2 Pages) STATEK

2 / 2 page

HOW TO ORDER CX103 LEADED CRYSTAL

CX1

03 — 1.0M,

500

STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com

10130 - Rev E

PACKAGING

Tray Pack

TYPICAL APPLICATION

FOR A PIERCE OSCILLATOR

The low profile CX miniature leaded 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 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 CX 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:

CL =

CD x CG

CD + CG

(1)

f0 = fS

[1+

]

2(C0 + CL)

(2)

Where f

S = Series resonant frequency of the crystal

C1 = Motional Capacitance

C0 = Shunt Capacitance

AMPLIFIER

BUFFER

CX1

Contact factory for

design guidelines

OSC

Freq (f )

CONVENTIONAL CMOS

PIERCE OSCILLATOR CIRCUIT

“S” if special or

custom design.

Blank if Std.

Blank = Glass Lid

C = Ceramic Lid

Frequency

K = kHz

M = MHz

Calibration

Tolerance

@ 25OC

(in ppm)

Operating Temp. Range:

C = -10OC to +70OC

I = -40OC to +85OC

M = -55OC to +125OC

S = Customer Specified

05 -

(lead

free)

SPECIFICATIONS

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 M 1.8432 M 2.1M

Motional Resistance,R1(Ω)

600

275

500 775

300

475

Motional Resistance,R1 MAX

3 kΩ

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

Shunt Capacitance,C0 (pF)

1.2

1.3

1.1

1.0

1.3

Calibration Tolerance1

500 ppm (0.05%)

1000 ppm (0.1%)

10000 ppm (1.0%)

Drive Level

3 µW MAX

Load Capacitance2

7 pF

Turning Point (T0)2

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:

Function Mode

Extensional

Aging, first year

5 ppm MAX

Shock, survival

750 g, 0.3 ms, 1/2 sine

Vibration, survival

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.

1. Tighter tolerances available.

2. Other values available.

f-f0 = k(T-T

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