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RO2118A PDF预览

RO2118A

更新时间: 2024-01-10 18:49:52
品牌 Logo 应用领域
RFM 谐振器
页数 文件大小 规格书
2页 173K
描述
318.0 MHz SAW Resonator

RO2118A 技术参数

生命周期:Obsolete包装说明:ROHS COMPLIANT, CERAMIC, CASE SM-2, 4 PIN
Reach Compliance Code:unknown风险等级:5.84
晶体/谐振器类型:1-PORT频率容差 (MHz):0.1
插入损耗:1.5 dBJESD-609代码:e4
安装特点:SURFACE MOUNT标称工作频率:318 MHz
并联电容:3.45 pF物理尺寸:L5.99XB3.99XH2.29 (mm)/L0.236XB0.157XH0.09 (inch)
表面贴装:YES端子面层:GOLD

RO2118A 数据手册

 浏览型号RO2118A的Datasheet PDF文件第2页 
®
RO2118A  
Ideal for 318 MHz Transmitters  
Very Low Series Resistance  
Quartz Stability  
Surface-Mount, Ceramic Case with 21 mm2 Footprint  
318.0 MHz  
SAW  
Complies with Directive 2002/95/EC (RoHS)  
Resonator  
The RO2118A 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 operat-  
ing at 318 MHz. This SAW is designed for AM transmitters remote control and wireless security applications  
operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy.  
Absolute Maximum Ratings  
Rating  
Value  
+0  
Units  
dBm  
VDC  
°C  
CW RF Power Dissipation  
DC Voltage Between Terminals  
Case Temperature  
±30  
-40 to +85  
260  
SM-2 Case  
Soldering Temperature (10 seconds / 5 cycles max.)  
°C  
Electrical Characteristics  
Characteristic  
Sym  
Notes  
Minimum  
Typical  
Maximum  
Units  
f
Frequency (+25 °C)  
Nominal Frequency  
317.900  
318.100  
MHz  
kHz  
dB  
C
2, 3, 4, 5  
Df  
Tolerance from 318.000 MHz  
±100  
1.5  
C
Insertion Loss  
Quality Factor  
IL  
2, 5, 6  
5, 6, 7  
0.7  
16,900  
1,300  
25  
Q
Unloaded Q  
U
Q
T
50 W Loaded Q  
L
Temperature Stability  
Turnover Temperature  
Turnover Frequency  
10  
1.0  
2.9  
40  
°C  
O
f
f
6, 7, 8  
O
C
2
Frequency Temperature Coefficient  
Absolute Value during the First Year  
FTC  
0.032  
10  
ppm/°C  
|f |  
Frequency Aging  
1, 6  
5
ppm/yr  
MW  
W
A
DC Insulation Resistance between Any Two Terminals  
R
RF Equivalent RLC Model  
Motional Resistance  
8
19  
M
L
Motional Inductance  
5, 6, 7, 9  
72.2067  
3.46904  
3.2  
µH  
M
C
Motional Capacitance  
Transducer Static Capacitance  
fF  
M
C
5, 6, 9  
2, 7  
3.5  
pF  
O
L
Test Fixture Shunt Inductance  
Lid Symbolization  
80  
nH  
TEST  
108  
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.  
Notes:  
1.  
2.  
Frequency aging is the change in fC with time and is specified at +65°C or less.  
8.  
Turnover temperature, TO, is the temperature of maximum (or turnover) fre-  
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-  
lated from: f = fO [1 - FTC (TO -TC)2]. Typically oscillator TO is approximately  
equal to the specified resonator TO.  
This equivalent RLC model approximates resonator performance near the reso-  
nant frequency and is provided for reference only. The capacitance CO is the  
static (nonmotional) capacitance between the two terminals measured at low  
frequency (10 MHz) with a capacitance meter. The measurement includes para-  
sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is  
approximately 0.05 pF. Transducer parallel capacitance can by calculated as:  
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, fC, is measured at the minimum insertion loss point,  
9.  
ILMIN, with the resonator in the 50 W test system (VSWR £ 1.2:1). The shunt  
inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOS-  
CILLATOR or fTRANSMITTER is approximately equal to the resonator fC.  
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 TC = +25°C±2°C.  
The design, manufacturing process, and specifications of this device are subject  
to change without notice.  
3.  
4.  
C
P » CO - 0.05 pF.  
5.  
6.  
7.  
Derived mathematically from one or more of the following directly measured  
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.  
RF Monolithics, Inc.  
RFM Europe  
Phone: (972) 233-2903  
Phone: 44 1963 251383  
Fax: (972) 387-8148  
Fax: 44 1963 251510  
E-mail: info@rfm.com  
http://www.rfm.com  
RO2118A-061901  
Page 1 of 2  
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.  

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