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
• 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 EN 300 220 in Europe.
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Terminals
Case Temperature
Soldering Temperature, 10 seconds / 5 cycles maximum
Value
+5
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
RO3156A
RO3156A-1
RO3156A-2
868.95 MHz
SAW
Resonator
SM5035-4
Electrical Characteristics
Characteristic
Frequency, +25 °C
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
Sym
f_C
∆f_C
IL
Q_U
Q_L
T_O
f_O
FTC
|fA|
R_M
L_M
C_M
C_O
L_TEST
Notes Minimum Typical Maximum Units
868.750
869.150
868.800
869.100
MHz
2,3,4,5
868.850
869.050
±200
±150
kHz
±100
2,5,6
1.2
2.0
dB
5,6,7
6200
850
10
25
40
°C
6,7,8
1
f_C
0.032
<±10
kHz
ppm/°C²
ppm/yr
5
1.0
MΩ
14.5
Ω
5, 6, 7, 9
18.0
µH
2.0
fF
5, 6, 9
2.1
pF
2, 7
15.8
nH
RO3156A: 714, RO3156A-1: 923, RO3156A-2 828, //YWWS
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. 6. The design, manufacturing process, and specifications of this device are subject
Aging may exceed the specification for prolonged temperatures above +65 °C.
to change without notice.
Typically, aging is greatest the first year after manufacture, decreasing in subse- ^{7. Derived mathematically from one or more of the following directly measured}
quent years.
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, IL_MIN, 8. Turnover temperature, T_O, is the temperature of maximum (or turnover)
with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt
frequency, f_O. The nominal frequency at any case temperature, T_C, may be
3.
4.
5.
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 ± 2 °C.
9.
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.
www.RFM.com E-mail: [e-mail]
© 2009-2011 by RF Monolithics, Inc.
Page 1 of 2
RO3156A - 7/5/11