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RO3156E-3
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Designed for European 868.95 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Complies with Directive 2002/95/EC (RoHS)
868.95 MHz
SAW Resonator
Pb
The RO3156E-3 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 fixed-frequency transmitters
operating at 868.95 MHz.This SAW is designed specifically for remote-control and wireless security
transmitters operating under ETSI EN 300 220.
Absolute Maximum Ratings
Rating
Value
Units
Input Power Level
0
dBm
DC Voltage
12
VDC
-40 to +85
°C
+260
°C
Operating Temperature Range
Soldering Temperature, 10 seconds / 5 cycles maximum
SM3030-6 Case
Electrical Characteristics
Characteristic
Frequency, +25 °C
Tolerance from 868.95 MHz
Insertion Loss
Quality Factor
Sym
fC
ΔfC
Unloaded Q
50 Ω Loaded Q
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
Absolute Value during the First Year
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
IL
QU
QL
TO
fO
Notes
2,3,4,5
Minimum
868.880
2,5,6
5,6,7
10
6,7,8
FTC
|fA|
RM
LM
CM
CO
1
5
5, 6, 7, 9
LTEST
5, 6, 9
2, 7
10
Typical
1.2
6700
800
25
fC
Maximum
869.020
±70
2.0
Units
MHz
kHz
dB
40
°C
kHz
0.032
<±10
1.0
14.1
17.2
2.0
2.3
14.6
949 || YWWS
500 Pieces / Reel
3000 Pieces / Reel
ppm/°C2
ppm/yr
MΩ
Ω
µH
fF
pF
nH
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 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. 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±2 °C.
The design, manufacturing process, and specifications of this device are subject
to change without notice.
©2010-2015 by Murata Electronics N.A., Inc.
RO3156E-3 (R) 2/6/15
7.
8.
9.
10.
Page 1 of 3
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 by calculated as:
CP ≈ CO - 0.05 pF.
Tape and Reel Standard for ANSI / EIA 481.
www.murata.com
Electrical Connections
The SAW resonator is bidirectional and
may be installed with either orientation.
The two terminals are interchangeable
and unnumbered. The callout NC
indicates no internal connection. The NC
pads assist with mechanical positioning
and stability. External grounding of the NC
pads is recommended to help reduce
parasitic capacitance in the circuit.
Pin
Typical Application Circuits
Connection
1
NC
2
Terminal
3
NC
4
NC
5
Terminal
6
NC
Typical Low-Power Transmitter Application
Modulation
Input
200k Ω
+9VDC
C1
47
L1
(Antenna)
1
6
2
3
5
4
Typical Test Circuit
C2
ROXXXXC
Bottom View
The test circuit inductor, LTEST, is tuned to resonate with the static
capacitance, CO, at FC.
RF Bypass
470
Typical Local Oscillator Application
Output
200k Ω
+VDC
C1
+VDC
6
L1
1
From 50 Ω
Network Analyzer
5
2
4
3
To 50 Ω
Network Analyzer
1
6
2
3
5
4
C2
ROXXXXC
Bottom View
RF Bypass
Equivalent LC Model
Power Test
0.05 pF*
Co = Cp + 0.05 pF
Cp
50 Ω Source
at F C
P INCIDENT
P REFLECTED
Low-Loss
Matching
Network to
50 Ω
1
6
2
3
Rm
5
*Case Parasitics
4
Lm
Cm
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and
does not include LC component temperature contributions.
fC = f O , T C = T O
0
0
-50
-100
-100
-150
-150
(f-fo ) / fo (ppm)
-50
-200
-80 -60 -40 -20
-200
0 +20 +40 +60 +80
ΔT = TC - T O ( °C )
©2010-2015 by Murata Electronics N.A., Inc.
RO3156E-3 (R) 2/6/15
Page 2 of 3
www.murata.com
SM3030-6 Case
6-Terminal Ceramic Surface-Mount Case
3.0 X 3.0 mm Nominal Footprint
Case and PCB Footprint Dimensions
Dimension
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
K
L
N
K
N
Min
2.87
2.87
1.12
0.77
2.67
1.47
0.72
1.37
0.47
1.17
mm
Nom
3.00
3.00
1.25
0.90
2.80
1.60
0.85
1.50
0.60
1.30
3.20
1.70
1.05
0.81
0.38
Max
3.13
3.13
1.38
1.03
2.93
1.73
0.98
1.63
0.73
1.43
Inches
Nom
0.118
0.118
0.049
0.035
0.110
0.063
0.033
0.059
0.024
0.051
0.126
0.067
0.041
0.032
0.015
Min
0.113
0.113
0.044
0.030
0.105
0.058
0.028
0.054
0.019
0.046
Max
0.123
0.123
0.054
0.040
0.115
0.068
0.038
0.064
0.029
0.056
Case Materials
O
Materials
N
M
M
PCB Footprint Top View
Solder Pad
Plating
0.3 to 1.0 µm Gold over 1.27 to 8.89 µm Nickel
Lid Plating
2.0 to 3.0 µm Nickel
Body
Al2O3 Ceramic
Pb Free
Top View
Bottom View
B
1
6
A 2
5
3
4
E
D
©2010-2015 by Murata Electronics N.A., Inc.
RO3156E-3 (R) 2/6/15
G
C
Page 3 of 3
F
H
6
1
5
2
4
3
I
J
www.murata.com
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