參數(shù)資料
型號(hào): RO2073A-17
廠商: RF MONOLITHICS INC
元件分類: SAW諧振器
英文描述: 1-PORT SAW RESONATOR, 315 MHz
封裝: ROHS COMPLIANT, CERAMIC, CASE SM-2, 4 PIN
文件頁數(shù): 1/2頁
文件大?。?/td> 118K
代理商: RO2073A-17
www.RFM.com
E-mail: info@rfm.com
Page 1 of 2
2008 by RF Monolithics, Inc.
RO2073A-17 - 3/25/08
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Frequency (+25 °C)
Absolute Frequency
fC
2, 3, 4, 5
314.900
315.100
MHz
Tolerance from 315.0 MHz
ΔfC
±100
kHz
Insertion Loss
IL
2, 5, 6
1.1
2.2
dB
Quality Factor
Unloaded Q
QU
5, 6, 7
11000
50
Ω Loaded Q
QL
1300
Temperature Stability
Turnover Temperature
TO
6, 7, 8
20
35
50
°C
Turnover Frequency
fO
fC
Frequency Temperature Coefficient
FTC
0.032
ppm/°C2
Frequency Aging
Absolute Value during the First Year
|fA|
1, 6
10
ppm/yr
DC Insulation Resistance between Any Two Terminals
5
1.0
M
Ω
RF Equivalent RLC Model
Motional Resistance
RM
5, 7, 9
13.5
Ω
Motional Inductance
LM
76.1
H
Motional Capacitance
CM
3.0
fF
Shunt Static Capacitance
CO
5, 6, 9
3.0
3.3
3.6
pF
Test Fixture Shunt Inductance
LTEST
2, 7
6.6
nH
Lid Symbolization
505
Ideal for 315 MHz Automotive-Keyless-Entry Transmitters
Very Low Series Resistance
Quartz Stability
Surface-Mount, Ceramic Case with 21 mm2 Footprint
Complies with Directive 2002/95/EC (RoHS)
The RO2073A-17 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 315 MHz. This SAW was designed for AM transmitters in automotive-keyless-entry
applications operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation (See Typical Test Circuit)
+0
dBm
DC Voltage Between Terminals (Observe ESD Precautions)
±30
VDC
Case Temperature
-40 to +85
°C
Soldering Temperature (10 seconds / 5 cycles max.)
260
°C
315.0 MHz
SAW
Resonator
RO2073A-17
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 in subsequent years.
2.
The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLATOR or fTRANSMITTER is approximately equal to the resonator
fC.
3.
One or more of the following United States patents apply: 4,454,488 and 4,616,197.
4.
Typically, equipment utilizing this device requires 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) frequency, fO. The nominal frequency at any case temperature, TC, may be
calculated from: f = fO [1 - FTC (TO -TC)
2]. Typically oscillator T
O is approximately equal to the specified resonator TO.
9.
This equivalent RLC model approximates resonator performance near the resonant 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 parasitic capacitance with "NC” pads unconnected. Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can by calculated as: CP ≈ CO -0.05 pF.
SM-2 Case
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