®
RO2053A-1
•
•
•
Ideal for 310.0 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Surface-Mount Ceramic Case with 21 mm2 Footprint
310.0 MHz
SAW
•
•
Complies with Directive 2002/95/EC (RoHS)
Resonator
The RO2053A-1 is a one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case. It
provides reliable, fundamental-mode, quartz frequency stabilization of local oscillatiors operating at 310
MHz. Applications include automotive keyless entry receivers operating in the USA under FCC Part 15 and
in Canada under DoC RSS-210.
Absolute Maximum Ratings
Rating
Value
+0
Units
dBm
VDC
°C
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
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
Center Frequency at +25 °C
Absolute Frequency
309.950
310.0
310.050
MHz
C
2, 3, 4, 5
Df
Tolerance from 310.000 MHz
±50
2.0
kHz
dB
C
Insertion Loss
Quality Factor
IL
2, 5, 6
5, 6, 7
1.7
19,063
2,157
25
Q
Unloaded Q
U
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
10
1.0
2.7
40
13
°C
O
f
f
6, 7, 8
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
|fA|
0.032
ppm/°C
Frequency Aging
1
5
£10
ppm/yr
MW
W
DC Insulation Resistance between Any Two Terminals
R
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
12.78
124.87
2.11
M
L
5, 6, 7, 9
µH
M
C
fF
M
C
5, 6, 7, 9
2, 7
2.34
2.43
pF
O
L
Test Fixture Shunt Inductance
101.87
104.58
nH
TEST
Lid Symbolization (in Addition to to Lot and/or Date Code)
308
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Lifetime (10 year) frequency aging.
8.
Turnover temperature, T , is the temperature of maximum (or turn-
O
The center frequency, f , is measured at the minimum insertion
over) frequency, f . The nominal frequency at any case tempera-
C
O
loss point, IL , with the resonator in the 50 W test system (VSWR
2
MIN
ture, T , may be calculated from: f = f [1 - FTC (T -T ) ].
C
O
O
C
£ 1.2:1). The shunt inductance, L
, is tuned for parallel reso-
TEST
9.
This equivalent RLC model approximates resonator performance
near the resonant frequency and is provided for reference only. The
nance with C at f .
O
C
3.
4.
One or more of the following United States patents apply:
4,454,488 and 4,616,197.
capacitance C is the static (nonmotional) capacitance between
O
the two terminals measured at low frequency (10 MHz) with a
capacitance meter. The measurement includes parasitic capaci-
tance with ”NC” pads unconnected. Case parasitic capacitance is
approximately 0.05 pF. Transducer parallel capacitance can by
Typically, equipment utilizing this device requires emissions testing
and government approval, which is the responsibility of the equip-
ment manufacturer.
5.
6.
Unless noted otherwise, case temperature T = +25°C±2°C.
C
calculated as: C » C - 0.05 pF.
P O
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: f , IL, 3 dB bandwidth, f versus T , and
C
C
C
C .
O
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-9148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
RO2053A-1-061901
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©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RFM [ RF MONOLITHICS, INC ]
