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RO3101A
* * * * * Ideal for European 433.92 MHz Transmitters Very Low Series Resistance Quartz Stability Surface-Mount Ceramic Case Complies with Directive 2002/95/EC (RoHS)
Pb
The RO3101A 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 433.92 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.
433.92 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 max.)
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 Shunt Static Capacitance Test Fixture Shunt Inductance Lid Symbolization (in addition to Lot and/or Date Codes) DC Insulation Resistance between Any Two Terminals RM LM CM CO LTEST 5, 6, 9 2, 7 5, 7, 9 Absolute Frequency Tolerance from 433.920 MHz
Sym
fC fC IL QU QL TO fO FTC |fA|
Notes
2,3,4,5 2,5,6 5,6,7
Minimum
433.845
Typical
Maximum
433.995 75
Units
MHz kHz dB
1.5 9000 1458 10 25 fC 0.032 10 1.0 19.4 63.8 2.11 2.4 55.1 655 // YWWS
2.2
40
C ppm/C2 ppm/yr M H fF pF nH
6,7,8 1 5
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 +65C or less. Aging may exceed the specification for prolonged temperatures above +65C. 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 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 = +25C2C. The design, manufacturing process, and specifications of this device are
7. 8.
9.
10.
subject to change without notice. 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 per ANSI / EIA 481.
www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc.
Page 1 of 2 RO3101A - 3/26/08
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.
Terminal
Case Ground Case Ground
Equivalent LC Model
0.05 pF* Co = Cp + 0.05 pF Cp *Case Parasitics
Terminal
Rm
Lm
Cm
Typical Test Circuit
The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC.
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
(f-fo ) / fo (ppm)
0 -50 -100 -150 -200 0 +20 +40 +60 +80
-50
-100
ELECTRICAL TEST
From 50 Network Analyzer To 50 Network Analyzer
-150 -200 -80 -60 -40 -20
Typical Circuit Land Pattern
Board
POWER TEST
P INCIDENT
The circuit board land pattern shown below is one possible design. The optimum land pattern is dependent on the circuit board assembly process which varies by manufacturer. The distance between adjacent land edges should be at a maximum to minimize parasitic capacitance. Trace lengths from terminal lands to other components should be short and wide to minimize parasitic series inductances.
T = T C - T O ( C )
(4 Places)
Low-Loss Matching Network to 50
Terminal NC NC Terminal
50 Source P at F C REFLECTED
Typical Dimension: 0.010 to 0.047 inch (0.25 to 1.20 mm)
Case Design
CW RF Power Dissipation = P INCIDENT - P REFLECTED
Typical Application Circuits
Top View
B
Side View
C
Bottom View
E (3x)
Typical Low-Power Transmitter Application
+9VDC 200k Modulation Input C1 47 L1 (Antenna)
3 2 1
A
4 F (4x)
C2 RO3XXXA Bottom View 470 RF Bypass
D
G (1x)
Typical Local Oscillator Applications
Output +VDC C1 L1 C2 RO3XXXA Bottom View RF Bypass +VDC
Millimeters Dimensions Min
A B C D E F G 4.87 3.37 1.45 1.35 .67 .37 1.07
Inches Max
5.13 3.63 1.60 1.50 .93 .63 1.33
Nom
5.0 3.5 1.53 1.43 .80 .50 1.20
Min
.191 .132 .057 .040 .026 .014 .042
Nom
.196 .137 .060 .057 .031 .019 .047
Max
.201 .142 .062 .059 .036 .024 .052
www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc.
Page 2 of 2 RO3101A - 3/26/08

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