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| 型号： | RO3118D |
| 厂商： | RFM |
| 文件页数： | 1/2页 |
| 文件大小： | 0K |
| 描述： | SAW RESONATOR 318.0MHZ SM3838-6 |
| 标准包装： | 500 |
| 系列： | RO |
| 频率： | 318MHz |
| 类型： | SAW |
| 特点： | 内置电容 |
| 频率稳定性： | 0.032ppm |
| 频率公差： | ±75kHz |
| 阻抗： | 1 兆欧 |
| 电容： | 2.8pF |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-SMD |
| 尺寸/尺寸： | 0.150" L x 0.150" W（3.80mm x 3.80mm） |
| 高度： | 0.055"（1.40mm） |
| 包装： | 带卷 (TR) |
RO3118D
?
Ideal for 318 MHz Automotive-Keyless-Entry Transmitters
?
?
Very Low Series Resistance
Quartz Stability
318.0 MHz
?
Complies with Directive 2002/95/EC (RoHS)
Pb
SAW
The RO3118D 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 318 MHz.
Absolute Maximum Ratings
Resonator
Rating
Input Power Level
DC Voltage
Storage Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Value
0
12
-40 to +85
260
Units
dBm
VDC
°C
°C
SM3838-6 Case
3.8 X 3.8
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Frequency (+25 °C)
Insertion Loss
Absolute Frequency
Tolerance from 318.0 MHz
f C
Δ f C
IL
2, 3, 4, 5
2, 5, 6
317.925
1.4
318.075
±75
2.0
MHz
kHz
dB
Quality Factor
Unloaded Q
50W Loaded Q
Q U
Q L
12900
1800
Temperature Stability
Turnover Temperature
T O
10
25
40
°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
10
ppm/yr
DC Insulation Resistance between Any Two Terminals
5
1.0
M Ω
RF Equivalent RLC Model
Motional Resistance
R M
16
Ω
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
101
2.4
2.8
86
μH
fF
pF
nH
Lid Symbolization
716 // 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:
1.
2.
3.
4.
5.
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 subsequent years.
The center frequency, f C , is measured at the minimum insertion loss point,
IL MIN , with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, L TEST , is tuned for parallel resonance with C O at f C .
Typically, f OSCILLATOR 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
government approval, which is the responsibility of the equipment
manufacturer.
Unless noted otherwise, case temperature T C = +25°C±2°C.
6.
7.
8.
9.
The design, manufacturing process, and specifications of this device are
subject to change without notice.
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)
frequency, f O . The nominal frequency at any case temperature, T C , may be
calculated 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
resonant frequency and is provided for reference only. The capacitance C O
is the static (nonmotional) capacitance between the two terminals
measured at low frequency (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.
www.RFM.com E-mail: info@rfm.com
?2008 by RF Monolithics, Inc.
Page 1 of 2
RO3118D - 3/27/08
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| RO3118E | 功能描述:谐振器 318.0 MHz +/-75kHz Single Port RoHS:否 制造商:Murata 频率:30 MHz 容差:25 PPM 系列:XRCGB 端接类型:SMD/SMT 工作温度范围:- 10 C to + 70 C 尺寸:1.6 mm W x 2 mm L x 0.65 mm H 封装:Reel |
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| RO3120A | 功能描述:谐振器 403.55MHz BW 75KHz IL 1.1dB Typ. SAW RoHS:否 制造商:Murata 频率:30 MHz 容差:25 PPM 系列:XRCGB 端接类型:SMD/SMT 工作温度范围:- 10 C to + 70 C 尺寸:1.6 mm W x 2 mm L x 0.65 mm H 封装:Reel |
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