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©2009 by RF Monolithics, Inc.

RO3103 (R) - 3/2/09

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Center Frequency (+25 °C)

Absolute Frequency

2, 3, 4, 5

417.925

418.075

MHz

Tolerance from 418.000 MHz

±75

kHz

Insertion Loss

IL

2, 5, 6

1.2

2.0

dB

Quality Factor

Unloaded Q

5, 6, 7

8300

50

Ω Loaded Q

1100

Temperature Stability

Turnover Temperature

6, 7, 8

10

25

40

°C

Turnover Frequency

kHz

Frequency Temperature Coefficient

FTC

0.037

Frequency Aging

Absolute Value during the First Year

1

≤10

ppm/yr

DC Insulation Resistance between Any Two Pins

5

1.0

M

Ω

RF Equivalent RLC Model

Motional Resistance

5, 7, 9

15

Ω

Motional Inductance

47.4

µH

Motional Capacitance

3.1

fF

Pin 1 to Pin 2 Static Capacitance

5, 6, 9

2.4

pF

Transducer Static Capacitance

5, 6, 7, 9

2.1

pF

Test Fixture Shunt Inductance

2, 7

61.6

nH

Lid Symbolization (in Addition to Lot and/or Date Codes)

RFM RO3103

TO39-3 Case

• Ideal for 418 MHz Transmitters

• Very Low Series Resistance

• Quartz Stability

• Rugged, Hermetic, Low-Profile TO39 Case

• Complies with Directive 2002/95/EC (RoHS)

The RO3103 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It

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

at 418.0 MHz. The RO2103 is designed specifically 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 Any Two Pins (Observe ESD Precautions)

±30

VDC

Case Temperature

-40 to +85

°C

Soldering Temperature (10 seconds / 5 cycles maximum)

260

°C

418.0 MHz

SAW

Resonator

RO3103

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

1.

less. Aging may exceed the specification for prolonged temperatures

above +65°C. Typically, aging is greatest the first year after manufacture,

decreasing significantly in subsequent years.

2.

3.

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

4,616,197 and others pending.

4.

Typically, equipment designs utilizing this device require emissions testing

and government 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

8.

9.

This equivalent RLC model approximates resonator performance near the

is the static (nonmotional) capacitance between pin1 and pin 2 measured

at low frequency (10 MHz) with a capacitance meter. The measurement

includes case parasitic capacitance with a floating case. For usual

grounded case applications (with ground connected to either pin 1 or pin 2

Pb