RO3156A
RO3156A-1
RO3156A-2
• 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)
868.95 MHz
SAW
Resonator
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
+5
Units
dBm
VDC
°C
CW RF Power Dissipation
DC Voltage Between Terminals
Case Temperature
±30
-40 to +85
260
Soldering Temperature (10 seconds / 5 cycles max.)
°C
SM5035-4
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
868.750
868.800
868.850
Typical
Maximum
869.150
869.100
869.050
±200
Units
Frequency (+25 °C) Nominal Frequency
Tolerance from 868.95 MHz
Insertion Loss
RO3156A
f
RO3156A-1
RO3156A-2
MHz
C
2,3,4,5
RO3156A
Δf
RO3156A-1
RO3156A-2
±150
kHz
dB
C
±100
IL
2,5,6
5,6,7
1.2
6200
850
25
2.0
Q
Quality Factor
Unloaded Q
U
Q
T
50 Ω Loaded Q
L
Temperature Stability
Turnover Temperature
10
40
°C
kHz
O
f
f
Turnover Frequency
6,7,8
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
|fA|
0.032
<±10
ppm/°C
Frequency Aging
1
5
ppm/yr
MΩ
Ω
DC Insulation Resistance between Any Two Terminals
1.0
R
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
14.5
18.0
2.0
M
L
5, 6, 7, 9
µH
M
C
fF
M
C
5, 6, 9
2, 7
2.1
pF
O
L
Test Fixture Shunt Inductance
15.8
nH
TEST
Lid Symbolization (in addition to Lot and/or Date Codes)
714 // YWWS
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Frequency aging is the change in f with time and is specified at +65°C or
C
6.
7.
The design, manufacturing process, and specifications of this device are
subject to change without notice.
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.
Derived mathematically from one or more of the following directly
measured parameters: f , IL, 3 dB bandwidth, f versus T , and C .
C
C
C
O
The center frequency, f , is measured at the minimum insertion loss point,
8.
Turnover temperature, T , is the temperature of maximum (or turnover)
C
O
IL , with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
frequency, f . The nominal frequency at any case temperature, T , may be
MIN
O
C
2
shunt inductance, L
, is tuned for parallel resonance with C at f .
TEST
O C
calculated from: f = f [1 - FTC (T -T ) ]. Typically oscillator T is
O O C O
Typically, f
or f
is approximately equal to the
OSCILLATOR
TRANSMITTER
approximately equal to the specified resonator T .
O
resonator f .
C
9.
This equivalent RLC model approximates resonator performance near the
3.
4.
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
measured at low frequency (10 MHz) with a capacitance meter. The
Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment
manufacturer.
measurement includes parasitic capacitance with "NC” pads unconnected.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can by calculated as: C ≈ C - 0.05 pF.
5.
Unless noted otherwise, case temperature T = +25°C±2°C.
C
P
O
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©2008 by RF Monolithics, Inc.
RO3156A - 3/27/08
RFM [ RF MONOLITHICS, INC ]
