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RO2156A Datasheet(PDF) 1 Page - RF Monolithics, Inc

Part # RO2156A
Description  868.95 MHz SAW Resonator
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Manufacturer  RFM [RF Monolithics, Inc]
Direct Link  http://www.rfm.com
Logo RFM - RF Monolithics, Inc

RO2156A Datasheet(HTML) 1 Page - RF Monolithics, Inc

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®
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
E-mail: info@rfm.com
Page 1 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RO2156A_RO2156A-1_RO2156A-2 _012202
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Frequency at +25°C Nominal Frequency
RO2156A
fC
2,3,4,5
868.875
869.025
MHz
RO2156A-1
868.875
869.175
RO2156A-2
868.850
869.050
Tolerance from 868.95 MHz
RO2156A
∆f
C
±75
kHz
RO2156A-1
-75
+225
RO2156A-2
±100
Insertion Loss
IL
2,5,6
1.1
2.0
dB
Quality Factor
Unloaded Q
QU
5,6,7
38,997
50
Ω Loaded Q
QL
4,000
Temperature Stability
Turnover Temperature
TO
6,7,8
10
25
40
°C
Turnover Frequency
fO
fC
kHz
Frequency Temperature Coefficient
FTC
0.032
ppm/°C2
Frequency Aging
Absolute Value during the First Year
|fA|
1
<±10
ppm/yr
DC Insulation Resistance between Any Two Terminals
5
1.0
M
RF Equivalent RLC Model
Motional Resistance
RM
5, 6, 7, 9
11.4295
Motional Inductance
LM
81.637
µH
Motional Capacitance
CM
0.41
fF
Shunt Static Capacitance
CO
5, 6, 7, 9
2.9
pF
Test Fixture Shunt Inductance
LTEST
2, 7
11.5679
nH
Lid Symbolization (in Addition to Lot and/ or Date Code)
197
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.
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
868.95 MHz
SAW
Resonator
RO2156A
RO2156A-1
RO2156A-2
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Lifetime (10 year) frequency aging.
2.
The center frequency, fC, is measured at the minimum insertion loss point,
ILMIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt
inductance, LTEST, is tuned for parallel resonance with CO at fC.
3.
One or more of the following United States patents apply: 4,454,488 and
4,616,197.
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 TC = +25°C±2°C for all specifica-
tions.
6.
The design, manufacturing process, and specifications of this device are sub-
ject to change without notice.
7.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
8.
Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
quency, fO. The nominal frequency at any case temperature, TC, may be cal-
culated from: f= fO [1- FTC (TO -TC)
2].
9.
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 ≈ CΟ − 0.05 pF.
SM-2 Case


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