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參數(shù)資料
| 型號(hào)： | RO2045 |
| 廠商： | RF MONOLITHICS INC |
| 元件分類： | SAW諧振器 |
| 英文描述： | 1-PORT SAW RESONATOR, 393.26 MHz |
| 封裝： | RUGGED, HERMETIC, LOW-PROFILE, TO-39, 3 PIN |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 259K |
| 代理商： | RO2045 |
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.
RO2045-102599
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Frequency (+25 °C)
Nominal Frequency
fC
2, 3, 4, 5
393.166
393.366
MHz
Tolerance from 393.266 MHz
f
C
±100
kHz
Insertion Loss
IL
2, 5, 6
2.3
3.8
dB
Quality Factor
Unloaded Q
QU
5, 6, 7
10,700
50
Loaded Q
QL
2,500
Temperature Stability
Turnover Temperature
TO
6, 7, 8
33
48
63
°C
Turnover Frequency
fO
fc + 7.7
kHz
Frequency Temperature Coefficient
FTC
0.037
ppm/°C2
Frequency Aging
Absolute Value during the First Year
|fA|
1, 6
10
ppm/yr
DC Insulation Resistance between Any Two Pins
5
1.0
M
RF Equivalent RLC Model
Motional Resistance
RM
5, 6, 7, 9
30
100
Motional Inductance
LM
129.908
H
Motional Capacitance
CM
1.26076
fF
Pin 1 to Pin 2 Static Capacitance
CO
5, 6, 9
2.9
3.2
3.5
pF
Transducer Static Capacitance
CP
5, 6, 7, 9
2.9
pF
Test Fixture Shunt Inductance
LTEST
2, 7
51
nH
Lid Symbolization (in Addition to Lot and/or Date Codes)
RFM RO2045
TO39-3 Case
Ideal for 393.26 MHz LOs in 403.96 MHz Superhet Receivers
Low Series Resistance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
The RO2045 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 fixed-frequency oscillators operating at
approximately 393.26 MHz. The RO2045 is designed specifically for the LO of 403.96 MHz superhet receiv-
ers in remote-control and wireless security applications for operation in South Africa.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation (See: Typical Test Circuit)
+5
dBm
DC Voltage Between Any Two Pins (Observe ESD Precautions)
±30
VDC
-40 to +85
°C
393.26 MHz
SAW
Resonator
RO2045
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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