®
RO2053A-1
310.0 MHz
SAW
Resonator
•
•
•
•
•
Ideal for 310.0 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Surface-Mount Ceramic Case with 21 mm
2
Footprint
Complies with Directive 2002/95/EC (RoHS)
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
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Value
+0
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
SM-2 Case
Electrical Characteristics
Characteristic
Center Frequency at +25 °C
Absolute Frequency
Tolerance from 310.000 MHz
Insertion Loss
Quality Factor
Temperature Stability
Unloaded Q
50
Ω
Loaded Q
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
RF Equivalent RLC Model
Absolute Value during the First Year
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization (in Addition to to Lot and/or Date Code)
DC Insulation Resistance between Any Two Terminals
R
M
L
M
C
M
C
O
L
TEST
5, 6, 7, 9
2, 7
2.7
308
5, 6, 7, 9
Sym
f
C
∆f
C
IL
Q
U
Q
L
T
O
f
O
FTC
|fA|
1
5
1.0
12.78
124.87
2.11
2.34
101.87
2.43
104.58
13
6, 7, 8
Notes
2, 3, 4, 5
2, 5, 6
5, 6, 7
10
Minimum
309.950
Typical
310.0
1.7
19,063
2,157
25
f
C
0.032
≤10
ppm/°C
2
ppm/yr
MΩ
Ω
µH
fF
pF
nH
40
°C
Maximum
310.050
±50
2.0
Units
MHz
kHz
dB
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Lifetime (10 year) frequency aging.
8.
2.
3.
4.
5.
6.
7.
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 reso-
nance with C
O
at 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 equip-
ment manufacturer.
Unless noted otherwise, case temperature T
C
= +25°C±2°C.
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
.
9.
Turnover temperature, T
O
, is the temperature of maximum (or turn-
over) frequency, f
O
. The nominal frequency at any case tempera-
ture, T
C
, may be calculated from: f = f
O
[1 - FTC (T
O
-T
C
)
2
].
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 capaci-
tance 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.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
RO2053A-1-061901
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RFM [ RF MONOLITHICS, INC ]
