RO3138A [MURATA]

1-PORT SAW RESONATOR, 407.3 MHz, ROHS COMPLIANT, CERAMIC, CASE SM5035-4;


型号：	RO3138A
厂家：	muRata
描述：	1-PORT SAW RESONATOR, 407.3 MHz, ROHS COMPLIANT, CERAMIC, CASE SM5035-4 晶体谐振器
文件：	总2页 (文件大小：66K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

RO3138A

• Ideal for European 407.3 MHz Transmitters

• Very Low Series Resistance

• Quartz Stability

• Surface-Mount Ceramic Case

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

407.3 MHz

SAW

Resonator

The RO3138A 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

operating at 407.3 MHz.

Absolute Maximum Ratings

Rating

Value

Units

CW RF Power Dissipation (See: Typical Test Circuit)

dBm

DC voltage Between Terminals (Observe ESD Precautions)

Case Temperature

±30

-40 to +85

260

VDC

°C

Soldering Temperature (10 seconds / 5 cycles max.)

°C

SM5035-4

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Center Frequency (+25 °C)

Absolute Frequency

407.225

407.375

MHz

kHz

2,3,4,5

∆f

Tolerance from 407.3 MHz

±75

1.9

Insertion Loss

Quality Factor

2,5,6

5,6,7

1.3

14400

1900

Unloaded Q

50 Ω Loaded Q

Temperature Stability

Turnover Temperature

Turnover Frequency

°C

6,7,8

Frequency Temperature Coefficient

Absolute Value during the First Year

FTC

0.032

ppm/°C

|f |

Frequency Aging

≤10

ppm/yr

MΩ

Ω

DC Insulation Resistance between Any Two Terminals

1.0

RF Equivalent RLC Model

Motional Resistance

Motional Inductance

Motional Capacitance

Shunt Static Capacitance

15.6

5, 7, 9

µH

1.8

1.9

5, 6, 9

2, 7

Test Fixture Shunt Inductance

TEST

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

837 // YWWS

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

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

subject to change without notice.

Derived mathematically from one or more of the following directly

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

less. Aging may exceed the specification for prolonged temperatures

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

decreasing in subsequent years.

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

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

frequency, f . The nominal frequency at any case temperature, T , may be

IL , with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The

MIN

calculated from: f = f [1 - FTC (T -T ) ]. Typically oscillator T is

shunt inductance, L

, is tuned for parallel resonance with C at f .

TEST

O C

approximately equal to the specified resonator T .

This equivalent RLC model approximates resonator performance near the

resonant frequency and is provided for reference only. The capacitance C

is the static (nonmotional) capacitance between the two terminals

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

Typically, f

or f

is approximately equal to the

TRANSMITTER

OSCILLATOR

resonator f .

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

government approval, which is the responsibility of the equipment

manufacturer.

measurement includes parasitic capacitance with "NC” pads unconnected.

Case parasitic capacitance is approximately 0.05 pF. Transducer parallel

capacitance can by calculated as: C ≈ C - 0.05 pF.

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

10. Tape and Reel standard per ANSI / EIA 481.

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

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

Page 1 of 2

RO3138A - 1/6/09

Electrical Connections

Equivalent LC Model

The SAW resonator is bidirectional and may be

installed with either orientation. The two terminals

are interchangeable and unnumbered. The callout

NC indicates no internal connection. The NC pads

assist with mechanical positioning and stability.

External grounding of the NC pads is

Terminal

0.05 pF*

0.05 pF

*Case Parasitics

Terminal

recommended to help reduce parasitic

capacitance in the circuit.

C m

Typical Test Circuit

The test circuit inductor, L

Temperature Characteristics

The curve shown on the right

accounts for resonator

, is tuned to resonate with the static

TEST

f_C= f_O, T_C= T_O

capacitance, C , at F .

-50

contribution only and does not

include LC component

temperature contributions.

-50

-100

-150

-100

-150

-200

ELECTRICAL TEST

-200

-80 -60 -40 -20

Typical Circuit Board

Land Pattern

The circuit board land pattern

+40 +60 +80

+20

Ω

To 50

Network Analyzer

From 50

Network Analyzer

T = T_C- T_O( °C )

∆

shown below is one possible

design. The optimum land pattern is dependent on the circuit board

assembly process which varies by manufacturer. The distance between

adjacent land edges should be at a maximum to minimize parasitic

capacitance. Trace lengths from terminal lands to other components should

be short and wide to minimize parasitic series inductances.

POWER TEST

(4 Places)

INCIDENT

Terminal

Low-Loss

Matching

Network to

Ω

at F_C

Typical Dimension:

0.010 to 0.047 inch

(0.25 to 1.20 mm)

50 Source

REFLECTED

Ω

Case Design

INCIDENT - REFLECTED

CW RF Power Dissipation =

Top View

Side View

Bottom View

Typical Application Circuits

E (3x)

F (4x)

Typical Low-Power Transmitter Application

+9VDC

Ω

200k

Modulation

Input

(Antenna)

G (1x)

RF Bypass

RO3XXXA

Bottom View

470

Millimeters

Inches

Nom

Typical Local Oscillator Applications

Dimensions

Min

Nom

Max

Min

Max

Output

4.87

3.37

1.45

1.35

.67

5.0

3.5

5.13

3.63

1.60

1.50

.93

.191

.132

.057

.040

.026

.014

.042

.196

.137

.060

.057

.031

.019

.047

.201

.142

.062

.059

.036

.024

.052

+VDC

1.53

1.43

.80

.37

.50

.63

RO3XXXA

Bottom View

1.07

1.20

1.33

RF Bypass

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

Page 2 of 2

RO3138A - 1/6/09

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