RO3144A [MURATA]

1-Port Saw Resonator, 916.5MHz Nom, ROHS COMPLIANT, CERAMIC, CASE SM5035-4;


型号：	RO3144A
厂家：	muRata
描述：	1-Port Saw Resonator, 916.5MHz Nom, ROHS COMPLIANT, CERAMIC, CASE SM5035-4 晶体谐振器
文件：	总2页 (文件大小：185K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

RFM products are now

Murata products.

RO3144A

• Designed for 916.5 MHz Transmitters

• Very Low Series Resistance

• Quartz Stability

• Surface-mount Ceramic Case

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

916.5 MHz

SAW

Resonator

The RO3144A is a one-port surface-acoustic-wave (SAW) resonator packaged in a surface-mount ceramic

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

operating at 916.5 MHz.

Absolute Maximum Ratings

Rating

Value

Units

dBm

VDC

°C

CW RF Power Dissipation

DC Voltage Between Terminals

Case Temperature

±30

-40 to +85

260

Soldering Temperature, 10 seconds / 5 cycles maximum

°C

SM5035-4

Electrical Characteristics

Characteristic

Frequency, +25 °C

Sym

Notes

Minimum

916.300

916.350

916.400

Typical

Maximum

916.700

916.650

916.600

±200

Units

RO3144A

RO3144A-1

RO3144A-2

RO3144A

f_C

MHz

2,3,4,5

Tolerance from 916.5 MHz

f_C

RO3144A-1

RO3144A-2

±150

kHz

±100

Insertion Loss

Quality Factor

Q_U

Q_L

2,5,6

5,6,7

1.2

6600

750

2.5

Unloaded Q

50 Loaded Q

Temperature Stability

Turnover Temperature

T_O

°C

Turnover Frequency

f_O

6,7,8

f_C

kHz

ppm/°C²

ppm/yr

Frequency Temperature Coefficient

Absolute Value during the First Year

FTC

|fA|

0.032

<±10

Frequency Aging

DC Insulation Resistance between Any Two Terminals

1.0

M



RF Equivalent RLC Model

Motional Resistance

Motional Inductance

Motional Capacitance

Shunt Static Capacitance

R_M

L_M

13.1

5, 6, 7, 9

µH

C_M

2.1

C_O

5, 6, 9

2, 7

2.09

14.5

Test Fixture Shunt Inductance

Lid Symbolization

L_TEST

RO3144A: 663, RO3144A-1: 897, RO3144A-2: 813, // YYWWS

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

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

subject to change without notice.

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.

Derived mathematically from one or more of the following directly

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

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

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

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

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

MIN

shunt inductance, L

, is tuned for parallel resonance with C at f .

TEST

O C

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

Typically, f

or f

is approximately equal to the

OSCILLATOR

TRANSMITTER

approximately equal to the specified resonator T .

resonator f .

This equivalent RLC model approximates resonator performance near the

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

4,616,197.

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, 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 ± 2 °C.

RO3144A (R) 4/24/14

Page 1 of 2

www.murata.com

Electrical Connections

Equivalent RLC 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

+ C

Terminal

recommended to help reduce parasitic

capacitance in the circuit.

Temperature Characteristics

The curve shown on the right

accounts for resonator

contribution only and does not

include LC component

f_C= f_O, T_C= T_O

Typical Test Circuit

The test circuit inductor, L_TEST, is tuned to resonate with the static

capacitance, C_O, at F_C.

-50

-100

-150

-100

-150

-200

temperature contributions.

-200

ELECTRICAL TEST

-80 -60 -40 -20

+40 +60 +80

+20

Case

T = T_C- T_O( °C )





To 50

Network Analyzer

From 50

Network Analyzer

(

POWER TEST

INCIDENT

Terminal

Low-Loss

Matching

Network to

(



at F_C

50 Source

REFLECTED



INCIDENT - REFLECTED

CW RF Power Dissipation =

Typical Application Circuits

Typical Low-Power Transmitter Application

+9VDC



200k

Modulation

Input

(Antenna)

PCB Land Pattern

Top View

RF Bypass

RO3XXXA

Bottom View

470

Millimeters

Nom

5.00

Inches

Nom

Dimensions

Min

Max

5.13

3.63

1.60

1.50

0.93

0.63

1.33

Min

Max

4.87

3.37

1.45

1.35

0.67

0.37

1.07

0.191

0.196

0.137

0.060

0.057

0.031

0.019

0.047

0.041

0.058

0.119

0.057

0.076

0.201

Typical Local Oscillator Applications

3.50

0.132

0.142

Output

1.53

0.057

0.062

+VDC

1.43

0.040

0.059

+VDC

0.80

0.026

0.036

0.50

0.014

0.024

1.20

0.042

0.052

1.04

RO3XXXA

Bottom View

1.46

RF Bypass

3.01

1.44

1.92

RO3144A (R) 4/24/14

Page 2 of 2

www.murata.com

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