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Murata products.
©2010-2015 by Murata Electronics N.A., Inc.
RO3156D/D-1/D-2 (R) 2/5/15 Page 1 of 2 www.murata.com
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Frequency, +25 °C RO3156D
fC
2, 3, 4, 5
868.750 869.150
MHzRO3156D-1 868.800 869.100
RO3156D-2 868.850 869.050
Tolerance from 916.5 MHz RO3156D
ΔfC
±200
kHzRO3156D-1 ±150
RO3156D-2 ±100
Insertion Loss IL 2, 5, 6 1.20 2.5 dB
Quality Factor Unloaded Q QU5, 6, 7 6300
50 Ω Loaded Q QL850
Temperature Stability Turnover Temperature TO
6, 7, 8
10 25 40 °C
Turnover Frequency fOfc MHz
Frequency Temperature Coefficient FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year |fA| 1 10 ppm
DC Insulation Resistance between Any Two Terminals 5 1.0 MΩ
RF Equivalent RLC Model Motional Resistance RM
5, 6, 7, 9
15.7 Ω
Motional Inductance LM18.1 µH
Motional Capacitance CM1.85 fF
Transducer Static Capacitance CO5, 6, 9 2.2 pF
Test Fixture Shunt Inductance LTEST 2, 7 15.2 nH
Lid Symbolization RO3156D: 715, RO3156D-1: 924, RO3156D-2: 925 //YWWS
Standard Reel Quantity Reel Size 7 Inch 10 500 Pieces / Reel
Reel Size 13 Inch 3000 Pieces / Reel
• Designed for 868.95 MHz SRD Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS)
The RO3156D is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case.
It provides reliable, fundamental-mode stabilization of fixed-frequency transmitters operating at 868.95 MHz.
This SAW is designed specifically for SRD remote control and security transmitters operating under ETSI
EN 300 220 regulations.
Absolute Maximum Ratings
Rating Value Units
Input Power Level 10 dBm
DC Voltage 12 VDC
Storage Temperature -40 to +85 °C
Soldering Temperature, 10 seconds / 5 cycles maximum 260 °C
868.95 MHz
SAW Resonator
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1. 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 subse-
quent years.
2. 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.
3. One or more of the following United States patents apply: 4,454,488 and
4,616,197.
4. Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment manufacturer.
5. Unless noted otherwise, case temperature TC=+25 ± 2 °C.
6. The design, manufacturing process, and specifications of this device are subject
to change without notice.
7. Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
8. 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.
9. 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-0.05pF.
10. Tape and Reel Standard Per ANSI/EIA 481.
SM3838-6 Case
3.8 X 3.8
Pb
RO3156D/D-1/D-2
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007
©2010-2015 by Murata Electronics N.A., Inc.
RO3156D/D-1/D-2 (R) 2/5/15 Page 2 of 2 www.murata.com
agc
-80-60-40-20 0+20 +40 +60
0
-50
-100
-150
+80
-200
0
-50
-100
-150
-200
f
C
= f
O
, T
C
= T
O
Δ
T = T
C
- T
O
( °C )
(f-foo
)/f(ppm)
0.05 pF*
0.05 pF
Cp
Co+
=
*Case Parasitics
Cp
Rm Lm C m
Equivalent RLC Model
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and
does not include LC component temperature contributions.
Pin Connection
1NC
2 Terminal
3NC
4NC
5NC
6 Terminal
7NC
8NC
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.
Example Application Circuits
Parameter Test Circuit
Power Test Circuit
+VDC
ROXXXXC
Bottom View
200k Ω
C1
L1
+VDC
C2
RF Bypass
Typical Local Oscillator Application Output
2 3
6 5 4
1
Modulation
Input
ROXXXXC
Bottom View
200k Ω
C1
L1
(Antenna)
47
+9VDC
C2
RF Bypass
470
Typical Low-Power Transmitter Application
2 3
6 5 4
1
Low-Loss
Matching
Network to
50 Ω
50 Ω Source
at F C
PINCIDENT
PREFLECTED
2 3
6 5 4
1
From 50 Ω
Network Analyzer
To 50 Ω
Network Analyzer
2
3
6
5
4
1
1
2
3
6
5
4
1
2
3
6
5
4
A
BC
DJ
E
GH
I
Case Dimensions
Dimension mm Inches
Min Nom Max Min Nom Max
A3.60 3.80 4.00 0.142 0.150 0.157
B3.60 3.80 4.00 0.142 0.150 0.157
C1.10 1.30 1.50 0.043 0.050 0.060
D0.95 1.10 1.25 0.037 0.043 0.049
E2.39 2.54 2.69 0.094 0.100 0.106
G0.90 1.00 1.10 0.035 0.040 0.043
H1.90 2.00 2.10 0.748 0.079 0.083
I0.50 0.60 0.70 0.020 0.024 0.028
J1.70 1.80 1.90 0.067 0.071 0.075
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007
