®
RO2188
390.0 MHz
SAW
Resonator
•
•
•
•
•
Ideal for 390.0 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Rugged, Hermetic, TO39-3 Package
Complies with Directive 2002/95/EC (RoHS)
Pb
The RO2188 is a true one-port, surface-acoustic-wave (SAW) resonator in TO39-3 case. It provides reliable,
fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 390.0 MHz.
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
Value
+5
±30
-40 to +85
Units
dBm
VDC
°C
TO39-3 Case
Electrical Characteristics
Characteristic
Center Frequency at +25 °C
Absolute Frequency
Tolerance from 304.0 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
Pin 1 to Pin 2 Static Capacitance
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
DC Insulation Resistance between Any Two Terminals
R
M
L
M
C
M
C
O
C
P
L
TEST
5, 6, 9
5, 6, 7, 9
2, 7
E319
3.6
5, 7, 9
Sym
f
C
∆f
C
IL
Q
U
Q
L
T
O
f
O
FTC
|fA|
1
5
1.0
11
54.963
3.0299
3.9
3.65
43
4.2
26
6, 7, 8
Notes
2, 3, 4, 5
2, 5, 6
5, 6, 7
27
Minimum
389.900
Typical
Maximum
390.100
±100
0.9
12,000
1,200
42
f
C
-5
0.037
≤10
57
°C
kHz
ppm/°C
2
ppm/yr
MΩ
Ω
µH
fF
pF
pF
nH
2.0
Units
MHz
kHz
dB
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Lifetime (10 year) frequency aging.
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 resonance with C
O
at f
C
.
3.
4.
5.
6.
7.
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 T
C
= +25°C±2°C.
The design, manufacturing process, and specifications of this device are sub-
ject to change without notice.
Derived mathematically from one or more of the following directly measured
9.
parameters: f
C
, IL, 3 dB bandwidth, f
C
versus T
C
, and C
O
.
8.
Turnover temperature, T
O
, is the temperature of maximum (or turnover) fre-
quency, f
O
. The nominal frequency at any case temperature, T
C
, may be cal-
culated 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 capacitance with a floating case. Case parasitic capaci-
tance is approximately 0.25pF. Transducer parallel capacitance can be cal-
culated as: C
P
≈
C
O
- 0.25pF.
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
RO2188-031300
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RFM [ RF MONOLITHICS, INC ]
