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©2008 by RF Monolithics, Inc. RO3101D - 3/26/08
CAUTION: Elec trostatic Sensitive D evic e. Obs erve precautions for handling.
Notes:
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency (+25 °C) Absolute Frequency fC2,3,4,5 433.845 433.995 MHz
Tolerance from 433.920 MHz ΔfC±75 kHz
Insertion Loss IL 2,5,6 1.3 2.5 dB
Quality Factor Unloaded Q QU5,6,7 8900
50 Ω Loaded Q QL1250
Temperature Stability Turnover Temperature TO6,7,8 10 25 40 °C
Turnover Frequency fOfC
Frequency Temperature Coefficient FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year |fA|1≤10 ppm/yr
DC Insulation Resistance between Any Two Terminals 5 1.0 MΩ
RF Equivalent RLC Model Motional Resistance RM5, 7, 9 16.4 Ω
Motional Inductance LM53.1 µH
Motional Capacitance CM2.5 fF
Shunt Static Capacitance CO5, 6, 9 2.4 pF
Test Fixture Shunt Inductanc e LTEST 2, 7 56.7 nH
Lid Symbolization (in addition to Lot and/or Date Code s) 702 // YWWS
S tandard Reel Quantity Reel Size 7 Inch 500 Pieces/Reel
Reel Size 13 Inch 3000 Pieces/Reel
• Ideal for European 433.92 MHz Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS)
The RO3101D is a true one-port, surface-acoustic-wave (SA W) resonator in a surface-mount, ceramic case.
It provides reliable, fundam ental-mode, quartz frequency stabilization of fixed-frequency transmitters
operating at 433.92 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.
Absolute Maximum Ratings
Rating Value Units
Input Power Level 0 dBm
DC voltage 12 VDC
Storage Temperature -40 to +85 °C
Soldering Tem perature (10 seconds / 5 cycles max.) 260 °C
433.92 MHz
SAW
Resonator
RO3101D
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 subsequent years.
2. The center frequency, fC, is mea sured at the minimum ins ertion loss point,
ILMIN, with the res onator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, LTEST, is tuned for parallel resonance with CO at fC.
Typica lly, fOSCILLATOR or fTRANSMITTER is approximately equal to the
resonator fC.
3. One or more of the following United States pat ents apply: 4,454,488 and
4,616,197.
4. Typically, equipment utilizing this device requires emissions testing and
government app roval, which is the responsibility of the equipment
manufacturer.
5. Unless noted otherwis e, case temperature TC= +25°C±2°C.
6. The design, manufacturing process, and specifications of this device are
subject to change without notice.
7. Derived mat hematically 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 tempera ture of maximum (or turnover)
frequenc y, fO. The nomina l frequ ency at an y case te mperatu re, 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 equiv alent RLC model approximate s resonat or performance near the
resonan t frequen cy and is provided for refer ence o nly. The capaci tanc e CO
is the static (nonmotional) capacitance bet ween the two terminal s
measured at low frequency (10 MHz) with a capacitance met er. The
measureme nt includes p arasitic cap acitanc e with "NC” pads unconne cted.
Case pa r as itic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can by calculated as: CP≈CO-0.05pF.
SM3838-6 Case
3.8 X 3.8
Pb
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©2008 by RF Monolithics, Inc. RO3101D - 3/26/08
-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 Cm
Equivalent LC Model
Temperature Charac teristics
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
5 Terminal
6NC
Power Test
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.
Typical Test Circuit
The test circuit inductor, LTEST, is tuned to resonate with the static
capacitance, CO, at FC.
Electri cal Tes t
Typical Application Circuits
Low-Loss
Matching
Network to
50 Ω
50 Ω Source
at FC
PINCIDENT
PREFLECTED
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 Applic ation
2 3
6 5 4
1
+VDC
ROXXXXC
Bottom View
200k Ω
C1
L1
+VDC
C2
RF Bypass
Typica l Local Oscillator Application Output
2 3
6 5 4
1
Case Dimensions
Dimension mm Inches
Min Nom Max Min Nom Max
A3.60 3.80 4.0 0.14 0.15 0.16
B3.60 3.80 4.0 0.14 0.15 0.16
C1.00 1.20 1.40 0.04 0.05 0.055
D0.95 1.10 1.25 0.033 0.043 0.05
E2.39 2.54 2.69 0.090 0.10 0.110
G0.90 1.0 1.10 0.035 0.04 0.043
H1.90 2.0 2.10 0.75 0.08 0.83
I0.50 0.6 0.70 0.020 0.024 0.028
J1.70 1.8 1.90 0.067 0.07 0.075
1
2
3
6
5
4
1
2
3
6
5
4
A
BC
DJ
E
GH
I