®
RO2115A
•
•
•
Ideal for 418 MHz Superhet Receivers in the U.K. and U.S.
Very Low Series Resistance
Quartz Stability
Surface-Mount, Ceramic Case with 21 mm2 Footprint
Complies with Directive 2002/95/EC (RoHS)
417.5 MHz
SAW
•
•
Resonator
The RO2115A 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
417.5 MHz. This SAW is designed for 418 MHz superhet receivers with 500 kHz IF (Philips UAA3201T).
Applications inlude remote-control and wireless security receivers operating in the United Kingdom under
DTI MPT 1340 and in the USA under FCC Part 15.
Absolute Maximum Ratings
Rating
Value
+0
Units
dBm
VDC
°C
CW RF Power Dissipation (See Typical Test Circuit)
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 (+25 °C)
Absolute Frequency
417.425
417.575
MHz
kHz
dB
C
2, 3, 4, 5
Df
Tolerance from 417.500 MHz
±75
1.5
C
Insertion Loss
Quality Factor
IL
2, 5, 6
5, 6, 7
0.8
13,700
1,200
25
Q
Unloaded Q
U
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
10
1.0
2.1
40
°C
O
f
f
6, 7, 8
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
0.032
ppm/°C
|f |
Frequency Aging
1
5
£10
ppm/yr
MW
W
A
DC Insulation Resistance between Any Two Terminals
R
RF Equivalent RLC Model
Motional Resistance
10
49.4334
2.93972
2.4
19
M
L
Motional Inductance
5, 7, 9
µH
M
C
Motional Capacitance
Transducer Static Capacitance
fF
M
C
5, 6, 9
2, 7
2.7
pF
O
L
Test Fixture Shunt Inductance
Lid Symbolization
60
nH
TEST
104
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Frequency aging is the change in fC with time and is specified at +65°C or
8.
Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
quency, fO. The nominal frequency at any case temperature, TC, may be cal-
culated from: f = fO [1 - FTC (TO -TC)2]. Typically, oscillator TO is
approximately equal to the specified resonator TO.
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
be calculated as: CP » CO - 0.05 pF.
less. Aging may exceed the specification for prolonged temperatures above
+65°C. Typically, aging is greatest the first year after manufacture, decreas-
ing in subsequent years.
The center frequency, fC, is measured at the minimum insertion loss point,
9.
ILMIN, with the resonator in the 50 W 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.
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 gov-
ernment approval, which is the responsibility of the equipment manufacturer.
Unless noted otherwise, case temperature TC = +25°C±2°C.
The design, manufacturing process, and specifications of this device are sub-
ject to change without notice.
3.
4.
10.
Packaged in 500PC Tape carrier.
5.
6.
7.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
RO2115A-061901
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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