RFM RO2144E

RO2144E
RO2144E-1
RO2144E-2
®
•
•
•
•
Ideal for 916.5 MHz FCC Part 15 Transmitters
Very Low Series Resistance
Quartz Stability
Complies with Directive 2002/95/EC (RoHS)
916.5 MHz
SAW
Resonator
Pb
The RO2144E is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case.
It provides reliable, fundamental-mode stabilization of fixed-frequency transmitters operating at 916.5 MHz.
This SAW is designed specifically for remote-control and data-link transmitters operating in the USA under
FCC Part 15 regulations.
Absolute Maximum Ratings
Rating
Value
10
Units
dBm
12
VDC
Storage Temperature
-40 to +125
°C
Operating Temperature Range
-40 to +125
°C
Input Power Level
DC Voltage
SM3030-6 Case
3.0 X 3.0
Electrical Characteristics
Characteristic
Frequency (+25 °C) Nominal Frequency
Sym
fC
RO2144E-1
RO2144E-2
Tolerance from 916.5 MHz
Notes
RO2144E
2, 3, 4, 5
RO2144E
Minimum
916.300
Typical
Maximum
916.700
Units
916.350
916.650
MHz
916.405
916.595
±200
∆fC
RO2144E-1
±150
RO2144E-2
Insertion Loss
Quality Factor
Temperature Stability
Frequency Aging
IL
2, 5, 6
Unloaded Q
QU
50 Ω Loaded Q
QL
Turnover Temperature
TO
Turnover Frequency
fO
5, 6, 7
FTC
Absolute Value during the First Year
|fA|
1
5
Motional Resistance
RM
Motional Inductance
LM
Motional Capacitance
CM
Transducer Static Capacitance
CP
5, 6, 9
LTEST
2, 7
25
dB
35
MHz
0.032
ppm/°C2
ppm
10
MΩ
12
5, 6, 7, 9
°C
fc
1.0
Lid Symbolization
Standard Reel Quantity
1.6
8900
TBD
6, 7, 8
Frequency Temperature Coefficient
Test Fixture Shunt Inductance
1.2
8000
15
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model
kHz
±95
17
19.8
Ω
µH
1.7
fF
1.9
pF
TBD
nH
515 // YWWS
Reel Size 7 Inch
10
Reel Size 13 Inch
500 Pieces / Reel
3000 Pieces / Reel
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
5.
6.
Frequency aging is the change in fC with time and is specified at +65°C or 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.
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. Typically, fOSCILLATOR or fTRANSMITTER is approximately equal
to the resonator fC.
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 TC = +25°C±2°C.
The design, manufacturing process, and specifications of this device are subject to change
without notice.
7.
8.
9.
10.
Derived mathematically from one or more of the following directly measured parameters: fC,
IL, 3 dB bandwidth, fC versus TC, and CO.
Turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fO. The
nominal frequency at any case temperature, TC, may be calculated from: f = fO [1 - FTC (TO TC)2]. Typically oscillator TO is approximately equal to the specified resonator TO.
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 0.05 pF. Transducer parallel capacitance can by
calculated as: CP ≈ CO - 0.05 pF.
Tape and Reel Standard for ANSI / EIA 481.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [email protected]
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RO2144E_RO2144E-1_RO2144E-2_042505
916.5 MHz
SAW Resonator
Electrical Connections
The SAW resonator is bidirectional and
may be installed with either orientation.
The two terminals are interchangeable
and unnumbered. The callout NC indicates no internal connection. The NC
pads assist with mechanical positioning
and stability. External grounding of the
NC pads is recommended to help reduce
parasitic capacitance in the circuit.
Pin
Connection
1
NC
2
Terminal
3
NC
4
NC
5
Terminal
6
NC
Power Test
50 Ω Source
at F C
P INCIDENT
Low-Loss
Matching
Network to
50 Ω
P REFLECTED
1
6
2
3
5
4
Typical Application Circuits
B
G
C
H
Typical Low-Power Transmitter Application
1
6
1
6
200k Ω
+9VDC
Modulation
Input
A
2
5
E
F
2
5
C1
I
47
L1
(Antenna)
4
3
1
3
4
6
D
2
3
5
4
J
C2
ROXXXXC
Bottom View
RF Bypass
470
Typical Local Oscillator Application
Case Dimensions
Dimension
A
B
C
D
E
F
G
H
I
J
Min
2.87
2.87
1.12
0.77
2.67
1.47
0.72
1.37
0.47
1.17
Output
200k Ω
+VDC
mm
Nom
3.0
3.0
1.25
0.90
2.80
1.6
0.85
1.5
0.60
1.30
Max
3.13
3.13
1.38
1.03
2.93
1.73
0.98
1.63
0.73
1.43
Min
0.113
0.113
0.044
0.030
0.105
0.058
0.028
0.054
0.019
0.046
Inches
Nom
0.118
0.118
0.049
0.035
0.110
0.063
0.033
0.059
0.024
0.051
C1
+VDC
L1
Max
0.123
0.123
0.054
0.040
0.115
0.068
0.038
0.064
0.029
0.056
1
6
2
3
5
4
C2
ROXXXXC
Bottom View
RF Bypass
Equivalent LC Model
0.05 pF*
Co = Cp + 0.05 pF
Cp
Typical Test Circuit
*Case Parasitics
The test circuit inductor, LTEST, is tuned to resonate with the static
capacitance, CO, at FC.
Rm
Electrical Test
Lm
Cm
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and
does not include LC component temperature contributions.
fC = f O , T C = T O
0
0
6
5
2
4
3
To 50 Ω
Network Analyzer
-50
-50
-100
-100
-150
-150
(f-fo ) / fo (ppm)
1
From 50 Ω
Network Analyzer
-200
-80 -60 -40 -20
-200
0 +20 +40 +60 +80
∆T = TC - T O ( °C )
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [email protected]
Page 2 of 2
http://www.rfm.com
RO2144E_RO2144E-1_RO2144E-2_042505