RO3112D
•
•
•
•
Ideal for European 433.420 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Complies with Directive 2002/95/EC (RoHS)
Pb
The RO3112D 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 433.420 MHz. This SAW 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.
433.420 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
Input Power Level
DC voltage
Storage Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Value
0
12
-40 to +85
260
Units
dBm
VDC
°C
°C
SM3838-6 Case
3.8 X 3.8
Electrical Characteristics
Characteristic
Center Frequency (+25 °C)
Insertion Loss
Quality Factor
Temperature Stability
Unloaded Q
50
Ω
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
Shunt Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization (in addition to Lot and/or Date Codes)
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
DC Insulation Resistance between Any Two Terminals
R
M
L
M
C
M
C
O
L
TEST
5, 6, 9
2, 7
5, 7, 9
Absolute Frequency
Tolerance from 433.420 MHz
Sym
f
C
Δf
C
IL
Q
U
Q
L
T
O
f
O
FTC
|f
A
|
Notes
2,3,4,5
2,5,6
5,6,7
Minimum
433.345
Typical
Maximum
433.495
±75
Units
MHz
kHz
dB
1.2
8400
1000
10
25
f
C
0.032
≤10
1.0
13.7
42.2
3.2
3.7
36.2
683 // YWWS
500 Pieces/Reel
3000 Pieces/Reel
2.5
40
°C
ppm/°C
2
ppm/yr
MΩ
Ω
µH
fF
pF
nH
6,7,8
1
5
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
Ω
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°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
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 by calculated as: C
P
≈
C
O
- 0.05 pF.
7.
8.
2.
9.
3.
4.
5.
6.
www.RFM.com
E-mail: info@rfm.com
©2008 by RF Monolithics, Inc.
Page 1 of 2
RO3112D - 3/27/08
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.
Power Test
Pin
1
2
3
4
5
6
NC
Terminal
NC
NC
Terminal
NC
Connection
P
INCIDENT
50
Ω
Source
at F
C
P
REFLECTED
Low-Loss
Matching
Network to
50
Ω
1
6
2
3
5
4
Typical Application Circuits
B
1
6
6
1
Modulation
Input
200k
Ω
C1
L1
(Antenna)
C
G
H
Typical Low-Power Transmitter Application
+9VDC
A 2
5
E
5
2
I
47
4
3
4
D
J
3
1
6
2
3
5
4
C2
ROXXXXC
Bottom View
RF Bypass
470
Case Dimensions
Dimension
Min
A
B
C
D
E
G
H
I
J
3.60
3.60
1.00
0.95
2.39
0.90
1.90
0.50
1.70
Typical Local Oscillator Application
Output
mm
Nom
3.80
3.80
1.20
1.10
2.54
1.0
2.0
0.6
1.8
Inches
Max
4.0
4.0
1.40
1.25
2.69
1.10
2.10
0.70
1.90
200k
Ω
+VDC
C1
L1
+VDC
Min
0.14
0.14
0.04
0.033
0.090
0.035
0.75
0.020
0.067
Nom
0.15
0.15
0.05
0.043
0.10
0.04
0.08
0.024
0.07
Max
0.16
0.16
0.055
0.05
0.110
0.043
0.83
0.028
0.075
1
6
2
3
5
4
C2
ROXXXXC
Bottom View
RF Bypass
Equivalent LC Model
0.05 pF*
Typical Test Circuit
The test circuit inductor, L
TEST
, is tuned to resonate with the static
capacitance, C
O
, at F
C
.
Cp
Co = Cp + 0.05 pF
*Case Parasitics
Electrical Test
Rm
Lm
Cm
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and
does not include LC component temperature contributions.
6
1
f
C
= f
O
, T
C
= T
O
0
(f-fo ) / fo (ppm)
To 50
Ω
Network Analyzer
0
-50
-100
-150
-200
0 +20 +40 +60 +80
From 50
Ω
Network Analyzer
5
2
-50
4
3
-100
-150
-200
-80 -60 -40 -20
Δ
T = T
C
- T
O
( °C )
www.RFM.com
E-mail: info@rfm.com
©2008 by RF Monolithics, Inc.
Page 2 of 2
RO3112D - 3/27/08
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