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参数资料
| 型号： | RO2146 |
| 厂商： | RF MONOLITHICS INC |
| 元件分类： | SAW谐振器 |
| 英文描述： | 1-PORT SAW RESONATOR, 447.725 MHz |
| 封装： | RUGGED, HERMETIC, LOW-PROFILE, TO-39, 3 PIN |
| 文件页数： | 1/2页 |
| 文件大小： | 259K |
| 代理商： | RO2146 |
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
E-mail: info@rfm.com
Page 1 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RO2146-102799
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency (+25 °C)
Absolute Frequency
fC
2, 3, 4, 5
447.625
447.825
MHz
Tolerance from 447.725 MHz
f
C
±100
kHz
Insertion Loss
IL
2, 5, 6
1.5
2.0
dB
Quality Factor
Unloaded Q
QU
5, 6, 7
11,950
50
Loaded Q
QL
1,900
Temperature Stability
Turnover Temperature
TO
6, 7, 8
10
25
40
°C
Turnover Frequency
fO
fc
Frequency Temperature Coefficient
FTC
0.037
ppm/°C2
Frequency Aging
Absolute Value during the First Year
|fA|
1
≤10
ppm/yr
DC Insulation Resistance between Any Two Pins
5
1.0
M
RF Equivalent RLC Model
Motional Resistance
RM
5, 7, 9
19
26
Motional Inductance
LM
80.7105
H
Motional Capacitance
CM
1.56562
fF
Pin 1 to Pin 2 Static Capacitance
CO
5, 6, 9
1.8
2.1
2.4
pF
Transducer Static Capacitance
CP
5, 6, 7, 9
1.8
pF
Test Fixture Shunt Inductance
LTEST
2, 7
60
nH
Lid Symbolization (in Addition to Lot and/or Date Codes)
RFM RO2146
TO39-3 Case
Ideal for 447.725 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
The RO2146 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-
vides reliable, fundamental-mode, quartz frequency stabilization of local transmitters operating at
447.725 MHz. The RO2146 is designed specifically for remote-control and wireless security transmitters
operating in Korea.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation
(See: Typical Test Circuit)
+0
dBm
DC Voltage Between Any Two Pins
(Observe ESD Precautions)
±30
VDC
Case Temperature
-40 to +85
°C
447.725 MHz
SAW
Resonator
RO2146
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Frequency aging is the change in fC 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 signifi-
cantly in subsequent years.
2.
The center frequency, fC, is measured at the minimum insertion loss point, ILMIN,
with the resonator in the 50
test system (VSWR ≤ 1.2:1). The shunt induc-
tance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLA-
TOR or fTRANSMITTER is less than the resonator fC.
3.
One or more of the following United States patents apply: 4,454,488 and
4,616,197 and others pending.
4.
Typically, equipment designs utilizing this device require emissions testing and
government approval, which is the responsibility of the equipment manufacturer.
5.
Unless noted otherwise, case temperature TC = +25°C±2°C.
6.
The design, manufacturing process, and specifications of this device are subject
to change without notice.
7.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
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 T
O is 20°C less than
the specified resonator TO.
9.
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 pin1 and pin 2 measured at low fre-
quency (10 MHz) with a capacitance meter. The measurement includes case
parasitic capacitance with a floating case. For usual grounded case applica-
tions (with ground connected to either pin 1 or pin 2 and to the case), add
approximately 0.25 pF to CO.
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