ETC RO2180B

RO2180B
•
•
•
Very Low Series Resistance
Quartz Stability
Surface-Mount, Solder Seal Package with 4.8 x 5.2 mm Footprint
433.92 MHz
SAW
Resonator
The RO2180B is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case.
It provides reliable, fundamental-mode, quartz frequency stabilization.
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Soldering Temperature
Value
+0
±30
-40 to +85
+250
Units
dBm
VDC
°C
°C
SM5248-8 Case
Electrical Characteristics
Frequency (+25 °C)
Characteristic
Nominal Frequency
Tolerance from 433.92 MHz
Sym
fC
DfC
Insertion Loss
Quality Factor
Temperature Stability
Frequency Aging
Notes
2, 3, 4, 5
IL
Unloaded Q
QU
50 Ω Loaded Q
QL
Turnover Temperature
TO
Turnover Frequency
fO
FTC
Absolute Value during the First Year
|fA|
Maximum
433.995
Units
MHz
±75
kHz
2
5, 6, 7
1,811
25
0.032
5
RM
Motional Inductance
LM
Motional Capacitance
CM
Shunt Static Capacitance
CO
5, 6, 7, 9
LTEST
2, 7
°C
fC+16
≤10
1
Motional Resistance
dB
11,535
6, 7, 8
Frequency Temperature Coefficient
Test Fixture Shunt Inductance
Typical
433.92
2, 5, 6
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model
Minimum
433.845
1.0
MΩ
5, 6, 7, 9
Lid Symbolization (in Addition to Lot and/or Date Code)
ppm/°C2
ppm/yr
18.63
Ω
78.79
µH
1.71
fF
1.82
pF
63.13
nH
295
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
5.
6.
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.
The 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.
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 equipment manufacturer.
Unless noted otherwise, case temperature TC = +25°C±5°C.
The design, manufacturing process, and specifications of this device are subject
to change without notice.
7.
8.
9.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
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 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.
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: [email protected]
http://www.rfm.com
RO2180B-031000
Page 1 of 2
433.92 MHz
SAW Resonator
Electrical Connections
This one-port, eight-terminal solder seal resonator is bidirectional. However, impedances and circuit board parasitics may not be symmetrical, requiring slightly different oscillator component-matching values.
Pin
Connection
1
Ground
2
Input or Output
3
Ground
4
Ground
5
Ground
6
Output or Input
7
Ground
8
Ground
Case Design
TOP VIEW
BOTTOM VIEW
J
B
D
E
5
6
7
H
I
A
Typical Circuit
4
8
45°
Input or Output
3
2
1
F
G
C
6
5
7
Nominal
4
3
8
2
1
Input or Output
1, 3, 4, 5, 7, 8 No Internal Connection
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.
Dimensions
Millimeters
Inches
A
5.18
.204
B
4.8
.189
C
0.508
.020
D
1.14
.045
E
1.27
.050
F
0.71
.028
G
1.12
.044
H
1.37
.054
I
2.59
.102
J
1.78
0.070
E-mail: [email protected]
http://www.rfm.com
RO2180B-031000
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