AEC-Q200
RoHS Compliance
This component is compliant
with RoHS directive.
This component was always
RoHS compliant from the first
date of manufacture.
RO3112A
•
•
•
•
Designed for 433.92 MHz Superheterodyne Receiver LOs
Very Low Series Resistance
Quartz Stability
Surface-mount Ceramic Case
The RO3112A is a one-port surface-acoustic-wave (SAW) resonator packaged in a surface-mount ceramic
case. It provides reliable, fundamental-mode quartz frequency stabilization of local oscillators operating at
433.42 MHz. The RO3112A is designed for 433.92 MHz superheterodyne receivers with a 500 kHz IF (Philips
UAA3201T). Applications include remote-control and wireless security receivers operating in Europe under
ETSI EN 300 220-2.
433.42 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
CW RF Power Dissipation (See Typical Test Circuit)
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Soldering Temperature (10 seconds / 5 cycles maximum)
Value
+0
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
SM5035-4
Electrical Characteristics
Characteristic
Center Frequency, +25 °C
Insertion Loss
Quality Factor
Temperature Stability
Unloaded Q
50
Loaded
Q
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
RF Equivalent RLC Model
Absolute Value during the First Year
Motional Resistance
Motional Inductance
Motional Capacitance
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
DC Insulation Resistance between Any Two Terminals
Absolute Frequency
Tolerance from 433.42 MHz
Sym
f
C
f
C
IL
Q
U
Q
L
T
O
f
O
FTC
|f
A
|
R
M
L
M
C
M
C
O
L
TEST
Notes
2, 3, 4, 5
2, 5, 6
5, 6, 7
Minimum
433.345
Typical
Maximum
433.495
±75
Units
MHz
kHz
dB
1.4
8000
1300
10
25
f
C
0.032
10
1.0
18.6
1.6
40
°C
ppm/°C
2
ppm/yr
M
6, 7, 8
1
5
5, 7, 9
5, 6, 9
2, 7
25
μH
fF
pF
nH
54.8
2.5
3.7
36.8
658 // YYWWS
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1.
Frequency aging is the change in f
C
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, f
C
, is measured at the minimum insertion loss point,
IL
MIN
, with the resonator in the 50
test system (VSWR 1.2:1). The
shunt inductance, L
TEST
, is tuned for parallel resonance with C
O
at f
C
.
Typically, f
OSCILLATOR
or f
TRANSMITTER
is approximately equal to the
resonator f
C
.
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 T
C
= +25 ± 2 °C.
The design, manufacturing process, and specifications of this device are
subject to change without notice.
7.
8.
Derived mathematically from one or more of the following directly
measured parameters: f
C
, IL, 3 dB bandwidth, f
C
versus T
C
, and C
O
.
Turnover temperature, T
O
, is the temperature of maximum (or turnover)
frequency, f
O
. The nominal frequency at any case temperature, T
C
, may be
calculated from: f = f
O
[1 - FTC (T
O
-T
C
)
2
]. Typically,
oscillator
T
O
is
approximately equal to the specified
resonator
T
O
.
This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance C
O
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: C
P
C
O
- 0.05 pF.
Packaged in 500PC Tape carrier.
2.
9.
3.
4.
5.
6.
10.
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. April 2014
RO3112A (R) 8/22/18
Page 1 of 2
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.
Equivalent RLC Model
C
P
C
C
P
S
O
C
S
C
= 0 .0 5 p F (C a s e P a r a s itic s )
= S A W S ta tic C a p a c ita n c e
= C
S
+ C
P
L
M
C
M
R
M
Temperature Characteristics
The curve shown on the right
accounts for resonator
contribution only and does not
include LC component
temperature contributions.
Typical Test Circuit
The test circuit inductor, L
TEST
, is tuned to resonate with the static
capacitance, C
O
, at F
C
.
Case
T o p V ie w
B
S id e V ie w
C
B o tto m
V ie w
E (3 x )
4
1
A
F (4 x )
3
2
G
(1 x )
D
H
I
Typical Application Circuits
I
I
H
H
K
L
J
H
PCB Land Pattern
Top View
Dimensions
A
B
C
D
E
F
G
H
I
J
K
L
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. April 2014
RO3112A (R) 8/22/18
Page 2 of 2
Millimeters
Min
4.87
3.37
1.45
1.35
0.67
0.37
1.07
-
-
-
-
-
Nom
5.00
3.50
1.53
1.43
0.80
0.50
1.20
1.04
1.46
3.01
1.44
1.92
Max
5.13
3.63
1.60
1.50
0.93
0.63
1.33
-
-
-
-
-
Min
0.191
0.132
0.057
0.040
0.026
0.014
0.042
-
-
-
-
-
Inches
Nom
0.196
0.137
0.060
0.057
0.031
0.019
0.047
0.041
0.058
0.119
0.057
0.076
Max
0.201
0.142
0.062
0.059
0.036
0.024
0.052
-
-
-
-
-
www.murata.com
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