RFM products are now Murata products.

RFM products are now Murata products.
RFM products are now
Murata products.
RO3144
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Ideal for 916.5 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
Complies with Directive 2002/95/EC (RoHS)
916.5 MHz
SAW
Resonator
Pb
The RO3144 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 transmitters operating
at 916.5 MHz. The RO3144 is designed specifically for remote-control and wireless security transmitters
operating in Europe under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation
+0
dBm
DC Voltage Between Any Two Pins
±30
VDC
Case Temperature
-40 to +85
°C
260
°C
Soldering Temperature (10 seconds / 5 cycles Max.)
Electrical Characteristics
Characteristic
Center Frequency (+25 °C)
Sym
Absolute Frequency
fC
Quality Factor
Temperature Stability
Frequency Aging
2, 3, 4, 5
fC
Tolerance from 433.920 MHz
Insertion Loss
IL
Unloaded Q
QU
50 Loaded Q
QL
Turnover Temperature
TO
Turnover Frequency
fO
Minimum
Typical
916.300
1.5
2, 5, 6
10
MHz
±200
kHz
2.5
dB
25
°C
kHz
ppm/°C2
ppm/yr
Frequency Temperature Coefficient
FTC
0.037
|fA|
10
1
40
fc + 2.7
Absolute Value during the First Year
1.0
M
19.7

16
µH
2
fF
5, 6, 9
1.7
pF
5, 6, 7, 9
2.5
pF
18
nH
Motional Resistance
RM
Motional Inductance
LM
Motional Capacitance
CM
Pin 1 to Pin 2 Static Capacitance
CO
Transducer Static Capacitance
CP
LTEST
2, 7
Test Fixture Shunt Inductance
Units
916.700
800
6, 7, 8
5
Maximum
5000
5, 6, 7
DC Insulation Resistance between Any Two Pins
RF Equivalent RLC Model
Notes
TO39-3 Case
5, 7, 9
Lid Symbolization (in Addition to Lot and/or Date Codes)
RFM RO3144
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 significantly in subsequent years.
The center frequency, fC, is measured at the minimum insertion loss point,
ILMIN, with the resonator in the 50  test system (VSWR 1.2:1). The
shunt inductance, LTEST, is tuned for parallel resonance with CO at fC.
Typically, fOSCILLATOR or fTRANSMITTER is less than the resonator fC.
One or more of the following United States patents apply: 4,454,488 and
4,616,197 and others pending.
Typically, equipment designs utilizing this device require 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
©2010-2014 by Murata Electronics N.A., Inc.
RO3144 (R) 4/24/14
7.
8.
9.
Page 1 of 2
subject to change without notice.
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 20°C
less than 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 pin1 and pin 2 measured
at low frequency (10 MHz) with a capacitance meter. The measurement
includes case parasitic capacitance with a floating case. For usual
grounded case applications (with ground connected to either pin 1 or pin 2
and to the case), add approximately 0.25 pF to CO.
www.murata.com
Temperature Characteristics
This one-port, two-terminal SAW resonator is bidirectional. The terminals
are interchangeable with the exception of circuit board layout.
Pin
Connection
1
Terminal 1
2
Terminal 2
3
Bottom View
Pin 1
Case Ground
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)
Electrical Connections
-200
-80 -60 -40 -20
Pin 2
T = TC - T O ( °C )
Pin 3
Typical Test Circuit
The test circuit inductor, LTEST, is tuned
to resonate with the static capacitance, CO at FC.
Equivalent LC Model
The following equivalent LC model is valid near resonance:
Electrical Test:
1

2

2
1
Network
Analyzer
-200
0 +20 +40 +60 +80
Co= Cp + 0.25 pF*
Cp
Network
Analyzer
R
3
M
L
M
C
*Case Parasitics
M
0.5 pF*
0.5 pF*
3
Power Test:
Case Design
1
P
INCIDENT
Low-Loss
Matching
Network
to 50 
50 
Source at P
REFLECTED
F
C
C
2
E
A
Typical Application Circuits
D
(3 places)
Typical Low-Power Transmitter Application:
Modulation
Input
200k 
J
(2 places)
+9VDC
1
47
L1
Dimensions
(Antenna)
2
C2
ROXXXX
Bottom View
3
RF Bypass
470
Output
+VDC
C1
ROXXXX
Min
+VDC
Max
9.40
B
3.18
2.50
3.50
Inches
Min
Max
0.370
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
L1
2
Millimeters
A
C
Typical Local Oscillator Application:
Bottom View
45°
MPS-H10
C1
1
H
F
-P
P
INCIDENT
REFLECTED
CW RF Power Dissipation =
G
B
3
J
1.02
1.40
0.040
0.055
C2
3
RF Bypass
©2010-2014 by Murata Electronics N.A., Inc.
RO3144 (R) 4/24/14
Page 2 of 2
www.murata.com
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Murata:
RO3144
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