RO3156A Datasheet, PDF (1/2 Pages) RF Monolithics, Inc – 868.95 MHz SAW Resonator

• Ideal for European 868.95 MHz Transmitters
• Very Low Series Resistance
• Quartz Stability
• Surface-Mount Ceramic Case with 21 mm² Footprint
• Complies with Directive 2002/95/EC (RoHS)
The RO3156A 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 868.95 MHz. This SAW is designed specifically for remote-control and wireless security
transmitters operating under ETSI-ETS 300 220 in Europe and under FTZ 17 TR 2100 in Germany.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation
+5
dBm
DC Voltage Between Terminals
±30
VDC
Case Temperature
-40 to +85
°C
Soldering Temperature (10 seconds / 5 cycles max.)
260
°C
RO3156A
RO3156A-1
RO3156A-2
868.95 MHz
SAW
Resonator
SM5035-4
Electrical Characteristics
Characteristic
Frequency (+25 °C) Nominal Frequency RO3156A
RO3156A-1
RO3156A-2
Tolerance from 868.95 MHz
RO3156A
RO3156A-1
RO3156A-2
Insertion Loss
Quality Factor
Unloaded Q
50 Ω Loaded Q
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
Absolute Value during the First Year
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization (in addition to Lot and/or Date Codes)
Sym
f_C
Δf_C
IL
Q_U
Q_L
T_O
f_O
FTC
|fA|
R_M
L_M
C_M
C_O
L_TEST
Notes
2,3,4,5
2,5,6
5,6,7
6,7,8
1
5
5, 6, 7, 9
5, 6, 9
2, 7
Minimum
868.750
868.800
868.850
Typical
1.2
6200
850
10
25
f_C
0.032
<±10
1.0
14.5
18.0
2.0
2.1
15.8
714 // YWWS
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
Maximum
869.150
869.100
869.050
±200
±150
±100
2.0
Units
MHz
kHz
dB
40
°C
kHz
ppm/°C²
ppm/yr
MΩ
Ω
µH
fF
pF
nH
1. Frequency aging is the change in f_C with time and is specified at +65°C or 6. The design, manufacturing process, and specifications of this device are
less. Aging may exceed the specification for prolonged temperatures
subject to change without notice.
above +65°C. Typically, aging is greatest the first year after manufacture, ^{7. Derived mathematically from one or more of the following directly}
decreasing in subsequent years.
measured parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
2. The center frequency, f_C, is measured at the minimum insertion loss point, 8. Turnover temperature, T_O, is the temperature of maximum (or turnover)
IL_MIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
frequency, f_O. The nominal frequency at any case temperature, T_C, may be
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.
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.
9. This equivalent RLC model approximates resonator performance near the
3. One or more of the following United States patents apply: 4,454,488 and
4,616,197.
resonant frequency and is provided for reference only. The capacitance C_O
is the static (nonmotional) capacitance between the two terminals
4. Typically, equipment utilizing this device requires emissions testing and
measured at low frequency (10 MHz) with a capacitance meter. The
government approval, which is the responsibility of the equipment
measurement includes parasitic capacitance with "NC” pads unconnected.
manufacturer.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
5. Unless noted otherwise, case temperature T_C = +25°C±2°C.
capacitance can by calculated as: C_P ≈ C_O - 0.05 pF.
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©2008 by RF Monolithics, Inc.
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RO3156A - 3/27/08