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©2008 by RF Monolithics, Inc.

RO3112 - 3/26/08

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Center Frequency (+25 °C)

Absolute Frequency

2, 3, 4, 5

433.345

433.495

MHz

Tolerance from 433.420 MHz

±75

kHz

Insertion Loss

IL

2, 5, 6

1.3

1.5

dB

Quality Factor

Unloaded Q

5, 6, 7

7500

50

Ω Loaded Q

940

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

14.5

Ω

Motional Inductance

39.6

µH

Motional Capacitance

3.4

fF

Pin 1 to Pin 2 Static Capacitance

5, 6, 9

3.5

pF

Transducer Static Capacitance

5, 6, 7, 9

3.2

pF

Test Fixture Shunt Inductance

2, 7

39

nH

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

RFM RO3112

TO39-3 Case

• Ideal for European 433.92 MHz Superhet Receiver LOs

• Very Low Series Resistance

• Quartz Stability

• Rugged, Hermetic, Low-Profile TO39 Case

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

The RO3112 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 local oscillators operating at approximately

433.42 MHz. The RO2112 is designed for IC based 433.92 MHz superhet receivers with 500 kHz IF (Philips

UAA3201T). Applications include remote-control and wireless security devices operating in Europe under

ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100.

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 max.)

260

°C

433.42 MHz

SAW

Resonator

RO3112

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