RO2156A 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 RO2156A 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 operat-
ing 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.
RO2156A
RO2156A-1
RO2156A-2
868.95 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Terminals
Case Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Value
+5
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
SM-2 Case
Electrical Characteristics
Characteristic
Frequency at +25°C Nominal Frequency
RO2156A
RO2156A-1
RO2156A-2
Tolerance from 868.95 MHz
RO2156A
RO2156A-1
RO2156A-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 Code)
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
2,3,4,5
2,5,6
5,6,7
6,7,8
1
5
5, 6, 7, 9
5, 6, 7, 9
2, 7
Minimum
868.875
868.875
868.850
Typical
-75
1.1
38,997
4,000
10
25
f_C
0.032
<±10
1.0
11.4295
81.637
0.41
2.9
11.5679
197
Maximum
869.025
869.175
869.050
±75
+225
±100
2.0
Units
MHz
kHz
dB
40
°C
kHz
ppm/°C²
ppm/yr
MΩ
Ω
µH
fF
pF
nH
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Lifetime (10 year) frequency aging.
7. Derived mathematically from one or more of the following directly measured
2.
The center frequency, f_C, is measured at the minimum insertion loss point,
parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
IL_MIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt
8.
Turnover temperature, T_O, is the temperature of maximum (or turnover) fre-
inductance, L_TEST, is tuned for parallel resonance with C_O at f_C.
quency, f_O. The nominal frequency at any case temperature, T_C, may be cal-
3. One or more of the following United States patents apply: 4,454,488 and
4,616,197.
culated from: f = f_O [1 - FTC (T_O -T_C)²].
9. This equivalent RLC model approximates resonator performance near the
4. Typically, equipment utilizing this device requires emissions testing and gov-
ernment approval, which is the responsibility of the equipment manufacturer.
5.
Unless noted otherwise, case temperature T_C = +25°C±2°C for all specifica-
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
tions.
includes parasitic capacitance with “NC” pads unconnected. Case parasitic
6. The design, manufacturing process, and specifications of this device are sub-
capacitance is approximately 0.05pF. Transducer parallel capacitance can be
ject to change without notice.
calculated as: C_P ≈ C_Ο − 0.05 pF.
RF Monolithics, Inc. Phone: [phone]
Fax: [phone]
RFM Europe
Phone: [phone]
Fax: [phone]
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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