ETC RO2150

RO2150
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Ideal for 304.0 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
304.0 MHz
SAW
Resonator
The RO2150 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency oscillators operating at
304.0 MHz. The RO2150 is designed for wireless remote-control transmitters operating in Japan and Australia.
Absolute Maximum Ratings
Rating
Value
Units
+5
dBm
±30
VDC
-40 to +85
°C
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
TO39-3 Case
Electrical Characteristics
Characteristic
Center Frequency at +25 °C
Absolute Frequency
Sym
fC
Tolerance from 304.0 MHz
∆fC
2, 3, 4, 5
IL
2, 5, 6
Unloaded Q
QU
50 Ω Loaded Q
QL
Turnover Temperature
TO
Insertion Loss
Quality Factor
Temperature Stability
Turnover Frequency
Frequency Aging
Notes
FTC
Absolute Value during the First Year
|fA|
RF Equivalent RLC Model
Maximum
Units
MHz
±50
kHz
2.0
dB
40
°C
2,000
6, 7, 8
25
fC
kHz
0.037
ppm/°C2
ppm/yr
≤±10
1
5
1.0
MΩ
16.1
RM
Motional Inductance
LM
Motional Capacitance
CM
Pin 1 to Pin 2 Static Capacitance
CO
5, 6, 9
CP
5, 6, 7, 9
1.01
pF
LTEST
2, 7
217.82
nH
5, 6, 7, 9
26
Ω
Motional Resistance
Transducer Static Capacitance
Test Fixture Shunt Inductance
1.5
10
DC Insulation Resistance between Any Two Terminals
Typical
304.0
14,350
5, 6, 7
fO
Frequency Temperature Coefficient
Minimum
120.9559
µH
2.266061
Lid Symbolization
1.26
fF
1.3
pF
RFM RO2150
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
5.
6.
7.
Lifetime (10 year) frequency aging.
The center 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.
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±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
8.
9.
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].
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
Pin 1 and Pin 2 measured at low frequency (10 MHz) with a capacitance meter. The measurement includes parasitic capacitance with
a floating case. Case parasitic capacitance is approximately
0.25pF. Transducer parallel capacitance can be calculated as CP ≈
CO - 0.25pF.
RF Monolithics, Inc.
RO2150-102799
304.0 MHz
SAW Resonator
Electrical Connections
Temperature Characteristics
Pin
Connection
1
Terminal 1
2
Terminal 2
3
Case Ground
Bottom View
Pin 1
Pin 2
The curve shown on the right
accounts for resonator contribution only and does not include oscillator temperature
characteristics.
fC = f O , T C = T O
0
0
-50
-50
-100
-100
-150
-150
(f-fo ) / fo (ppm)
This one-port, two-terminal SAW resonator is bidirectional. The terminals
are interchangeable with the exception of circuit board layout.
-200
-80 -60 -40 -20
Pin 3
-200
0 +20 +40 +60 +80
∆T = TC - T O ( °C )
Typical Test Circuit
The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO at FC.
Equivalent LC Model
Electrical Test:
The following equivalent LC model is valid near resonance:
Ω
1
Ω
2
1
Network
Analyzer
2
Network
Analyzer
Co= Cp + 0.25 pF*
Cp
3
*Case Parasitics
R
M
L
M
C
M
0.5 pF*
0.5 pF*
Power Test:
3
P
INCIDENT
50 Ω
Source at P
REFLECTED
F
C
1
Low-Loss
Matching
Network
to 50 Ω
Case Design
3
2
C
G
B
CW RF Power Dissipation =
-P
P
INCIDENT
REFLECTED
H
F
Typical Application Circuits
D
(3 places)
Typical Low-Power Transmitter Application:
Modulation
Input
200k Ω
E
A
J
(2 places)
MPS-H10
45°
+9VDC
47
C1
1
L1
Millimeters
(Antenna)
2
Inches
Dimensions
Min
C2
ROXXXX
Bottom View
3
RF Bypass
A
B
470
C
Typical Local Oscillator Application:
Output
+VDC
C1
1
L1
+VDC
2
Bottom View
3
Min
3.18
2.50
3.50
Max
0.366
0.125
0.098
0.138
D
0.46 Nominal
0.018 Nominal
E
5.08 Nominal
0.200 Nominal
F
2.54 Nominal
0.100 Nominal
G
2.54 Nominal
0.100 Nominal
H
J
C2
ROXXXX
Max
9.30
1.02
1.40
0.040
0.055
RF Bypass
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
RO2150-102799
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