RO3073E-1【PDF 1/2 页】SAW RESONATOR 315.0MHZ SM3030-6

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RO3073E-1

Ideal for 315 MHz Automotive-Keyless-Entry Transmitters

? Very Low Series Resistance

? Quartz Stability

? Complies with Directive 2002/95/EC (RoHS) Pb

The RO3073E-1 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 local oscillators operating at

approximately 315 MHz. This SAW was designed for AM transmitters in automotive-keyless-entry applica-

tions operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy.

Absolute Maximum Ratings

315.0 MHz

SAW

Resonator

Input Power Level

DC Voltage

Storage Temperature Range

Operating Temperature Range

Rating

Value

-40 to +125

-40 to +105

Units

dBm

VDC

°C

Soldering Temperature (10 seconds / 5 cycles max.)

260

°C

SM3030-6 Case

3.0 X 3.0

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Frequency (+25 °C)

Insertion Loss

Absolute Frequency

Tolerance from 315.0 MHz

f C

? f C

2, 3, 4, 5

2, 5, 6

314.950

1.6

315.050

±50

2.4

MHz

kHz

Quality Factor

Unloaded Q

50 ? Loaded Q

Q U

Q L

8200

1350

Temperature Stability

Turnover Temperature

T O

°C

Turnover Frequency

f O

6, 7, 8

f C

Frequency Temperature Coefficient

FTC

0.032

ppm/°C 2

Frequency Aging

Absolute Value during the First Year

|f A |

1, 6

ppm/yr

DC Insulation Resistance between Any Two Terminals

1.0

M ?

RF Equivalent RLC Model

Motional Resistance

R M

19.8

Test Fixture Shunt Inductance

Motional Inductance

Motional Capacitance

Shunt Static Capacitance

L M

C M

C O

L TEST

5, 7, 9

5, 6, 9

2, 7

3.1

4.1

μH

Lid Symbolization

802 // YWWS

Standard Reel Quantity

Reel Size 7 Inch

Reel Size 13 Inch

500 Pieces / Reel

3000 Pieces / Reel

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

Frequency aging is the change in f C with time and is specified at +65°C or less.

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.

The center frequency, f C , is measured at the minimum insertion loss point, IL MIN ,

with the resonator in the 50 ? test system (VSWR ≤ 1.2:1). The shunt induc-

tance, L TEST , is tuned for parallel resonance with C O at f C . Typically, f OSCILLA-

TOR or f TRANSMITTER is approximately equal to the resonator f C .

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

4,616,197.

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

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

Unless noted otherwise, case temperature T C = +25°C±2°C.

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

to change without notice.

10.

Derived mathematically from one or more of the following directly measured

parameters: f C , IL, 3 dB bandwidth, f C versus T C , and C O .

Turnover temperature, T O , is the temperature of maximum (or turnover) fre-

quency, f O . The nominal frequency at any case temperature, T C , may be calcu-

lated from: f = f O [1 - FTC (T O -T C ) 2 ]. Typically oscillator T O is approximately

equal to the specified resonator T O .

This equivalent RLC model approximates resonator performance near the reso-

nant frequency and is provided for reference only. The capacitance C O is the

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

quency (10 MHz) with a capacitance meter. The measurement includes parasitic

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

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

C P ≈ C O - 0.05 pF.

Tape and Reel Standard Per ANSI / EIA 481.

www.RFM.com E-mail: info@rfm.com

?2009 by RF Monolithics, Inc.

Page 1 of 2

RO3073E-1 8/13/09

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