LGER550 [LGE]

SAW Resonator; 声表面波谐振器


型号：	LGER550
厂家：	LGE
描述：	SAW Resonator 声表面波谐振器声表面波谐振器
文件：	总2页 (文件大小：1148K)
中文：	中文翻译
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SAW Resonator

LGER550

The LGER550 is a true one-port，surface-acoustic-wave (SAW) resonator in a surface-mount ceramic

QCC8C case. It provides reliable ， fundamental-mode ， quartz frequency stabilization of

fixed-frequency transmitters operating at 433.920 MHz.

1.Package Dimension

(QCC8C)

Connection

Input / Output

Terminal1

Output / Input

Terminal2

4,8

Case Ground

1,3,5,7

Empty

Sign

Data (unit: mm)

Sign

Data(unit:mm)

2.08

0.60

1.27

2.54

1.20

1.35

5.00

2.Marking

3.Equivalent LC Model and Test Circuit

LGER550

Color: Black or Blue

4.Typical Application Circuit

1) Telecontrol Circuitry

2) Local Oscillator Application

5.Typical Frequency Response

6.Temperature Characteristics

SAW Resonator

LGER550

7.Performance

7-1.Maximum Ratings

Rating

Value

+10

Units

dBm

VDC

℃

CW RF Power Dissipation

DC Voltage Between Any Two Pins

Case Temperature

±30V

-40 to +85

+235

Soldering Temperature

℃

7-2.Electronic Characteristics

Characteristic

Sym

Minimum

Typical

Maximum

Units

Absolute Frequency

Center Frequency

f_C

∆f_C

433.845

433.995

MHz

kHz

(+25℃)

Tolerance from 433.920 MHz

±75

1.3

Insertion Loss

2.0

Unloaded Q

Quality Factor

Q_U

Q_L

T_O

f_O

10,500

1,450

50 Ω Loaded Q

Turnover Temperature

1.0

1.9

℃

kHz

ppm/℃²

ppm/yr

MΩ

Temperature

Turnover Frequency

Stability

Frequency Temperature Coefficient

Frequency Aging Absolute Value during the First Year

DC Insulation Resistance Between Any Two Pins

Motional Resistance

FTC

|f_A|

0.037

≤10

R_M

L_M

Ω

Motional Inductance

RF Equivalent

61.724

2.1817

2.2

µH

RLC Model

Motional Capacitance

C_M

C_O

Pin 2 to Pin 6 Static Capacitance

2.5

☺ CAUTION: Electrostatic Sensitive Device. Observe precautions for handling !

NOTES:

1. Frequency aging is the change in f_Cwith time and is specified at +65℃or less. Aging may exceed the specification for prolonged

temperatures above +65℃. Typically, aging is greatest the first year after manufacture, decreasing in subsequent years.

2.The center frequency, f_C,is the frequency of minimum IL measured with the resonator in the specified test fixture in a 50 Ω test system

with VSWR ≤ 1.2 : 1. Typically, f_oscillatoror f_transmitteris approximately equal to the resonator f_C.

3.Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the

equipment manufacturer.

4.Unless noted otherwise , case temperature T_C=+25℃±2℃.

5.The design, manufacturing process, and specifications of this device are subject to change without notice.

6.Derived mathematically from one or more of the following directly measured parameters: f_C, IL, 3 dB bandwidth, f_Cversus T_C, and C_O.

7.Turnover temperature, T_O, is the temperature of maximum (or turnover) frequency, f_O,The nominal center frequency at any case

temperature , T_C, may be calculated from :f = f_O［1-FTC (T_O-T_C) ²］.Typically, oscillator T_Ois approximately equal to the specified

resonator T_O.

8.This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only . The

capacitance C_Ois the static (nonmotional) capacitance between the two terminals measured at low frequency (10MHz) with a

capacitance meter. Case parasitic capacitance is approximately 0.05pF.Transducer parallel capacitance can by calculated as: C_P= C_O-

0.05pF.

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