®

RF Monolithics, Inc.

Phone: (972) 233-2903

Fax: (972) 387-8148

E-mail: info@rfm.com

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RFM Europe

Phone: 44 1963 251383

Fax: 44 1963 251510

http://www.rfm.com

©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.

RO2103A-061901

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Frequency (+25 °C)

Nominal Frequency

2, 3, 4, 5

417.925

418.075

MHz

Tolerance from 418.000 MHz

∆f

C

±75

kHz

Insertion Loss

IL

2, 5, 6

1.0

2.0

dB

Quality Factor

Unloaded Q

5, 6, 7

16,100

50

Ω Loaded Q

1,700

Temperature Stability

Turnover Temperature

6, 7, 8

10

25

40

°C

Turnover Frequency

Frequency Temperature Coefficient

FTC

0.032

Frequency Aging

Absolute Value during the First Year

1, 6

10

ppm/yr

DC Insulation Resistance between Any Two Terminals

5

1.0

M

Ω

RF Equivalent RLC Model

Motional Resistance

5, 6, 7, 9

12

26

Ω

Motional Inductance

74.8223

µH

Motional Capacitance

1.93705

fF

Transducer Static Capacitance

5, 6, 9

1.6

1.9

2.2

pF

Test Fixture Shunt Inductance

2, 7

80

nH

Lid Symbolization

106

•

Ideal for 418 MHz Transmitters in the U.K. and U.S.

•

Very Low Series Resistance

•

Quartz Stability

•

•

Complies with Directive 2002/95/EC (RoHS)

The RO2103A is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case.

It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operat-

ing at 418.0 MHz. This SAW is designed for remote-control and wireless security transmitters operating in

the United Kingdom under DTI MPT 1340 and in the USA under FCC Part 15.

Absolute Maximum Ratings

Rating

Value

Units

CW RF Power Dissipation (See Typical Test Circuit)

+0

dBm

DC Voltage Between Terminals (Observe ESD Precautions)

±30

VDC

Case Temperature

-40 to +85

°C

Soldering Temperature (10 seconds / 5 cycles max.)

260

°C

418.0 MHz

SAW

Resonator

RO2103A

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

1.

Aging may exceed the specification for prolonged temperatures above +65°C.

Typically, aging is greatest the first year after manufacture, decreasing in subse-

quent years.

2.

3.

One or more of the following United States patents apply: 4,454,488 and

4,616,197.

4.

Typically, equipment utilizing this device requires emissions testing and govern-

ment approval, which is the responsibility of the equipment manufacturer.

5.

6.

The design, manufacturing process, and specifications of this device are subject

to change without notice.

7.

Derived mathematically from one or more of the following directly measured

8.

9.

This equivalent RLC model approximates resonator performance near the reso-

static (nonmotional) capacitance between the two terminals measured at low

frequency (10 MHz) with a capacitance meter. The measurement includes para-

sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is

approximately 0.05 pF. Transducer parallel capacitance can by calculated as:

SM-2 Case