RO2156D
RO2156D-1
RO2156D-2
®
•
•
•
•
Ideal for European 868.95 MHz Transmitters
Very Low Series Resistance
Quartz Stability
868.95 MHz
SAW
Resonator
Complies with Directive 2002/95/EC (RoHS)
Pb
The RO2156D 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.
Absolute Maximum Ratings
Rating
Value
10
Units
dBm
VDC
°C
Input Power Level
DC Voltage
12
Storage Temperature
-40 to +85
260
SM3838-6 Case
3.8 X 3.8
Soldering Temperature (10 seconds / 5 cycles max.)
°C
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
868.875
868.875
868.850
Typical
Maximum
869.025
869.175
869.050
±75
Units
Frequency at +25°C Nominal Frequency
Tolerance from 868.95 MHz
Insertion Loss
RO2156D
f
RO2156D-1
RO2156D-2
2,3,4,5
MHz
C
RO2156D
Df
RO2156D-1
RO2156D-2
-75
+225
kHz
dB
C
±100
IL
2,5,6
5,6,7
1.1
25
2.0
Q
Quality Factor
Unloaded Q
20,000
2,400
10
U
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
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
ppm/yr
MW
W
DC Insulation Resistance between Any Two Terminals
5
1.0
R
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
15
50
M
L
5, 6, 7, 9
5, 6, 7, 9
µH
M
C
0.7
2.3
fF
M
C
pF
O
Lid Symbolization (in Addition to Lot and/ or Date Code)
Standard Reel Quanitity
433 / YWWD
3000 Pieces / Reel
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Lifetime (10 year) frequency aging.
The center frequency, fC, is measured at the minimum insertion loss point,
7.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
ILMIN, with the resonator in the 50 W test system (VSWR £ 1.2:1). The shunt
8.
Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
inductance, LTEST, is tuned for parallel resonance with CO at fC.
quency, fO. The nominal frequency at any case temperature, TC, may be cal-
culated from: f = fO [1 - FTC (TO -TC)2].
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 0.05pF. Transducer parallel capacitance can be
calculated as: CP » CO - 0.05 pF.
3.
4.
5.
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 gov-
ernment approval, which is the responsibility of the equipment manufacturer.
Unless noted otherwise, case temperature TC = +25°C±2°C for all specifica-
9.
tions.
6.
The design, manufacturing process, and specifications of this device are sub-
ject to change without notice.
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RO2156D_RO2156D-1_RO2156D-2 _090503
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