RFM RO2156D-1

RO2156D
RO2156D-1
RO2156D-2
®
•
•
•
•
Ideal for European 868.95 MHz Transmitters
Very Low Series Resistance
Quartz Stability
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 operating 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.
868.95 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
Value
Units
Input Power Level
10
dBm
DC Voltage
12
VDC
-40 to +85
°C
260
°C
Storage Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
SM3838-6 Case
3.8 X 3.8
Electrical Characteristics
Characteristic
Sym
Frequency at +25°C Nominal Frequency
Notes
RO2156D
fC
RO2156D-1
2,3,4,5
RO2156D-2
Tolerance from 868.95 MHz
Minimum
Typical
869.025
868.875
869.175
868.850
869.050
-75
+225
RO2156D
RO2156D-2
Frequency Aging
Unloaded Q
IL
QU
50 Ω Loaded Q
QL
Turnover Temperature
TO
Turnover Frequency
fO
Frequency Temperature Coefficient
FTC
Absolute Value during the First Year
|fA|
2,5,6
5,6,7
kHz
10
6,7,8
RM
Motional Inductance
LM
Motional Capacitance
CM
Shunt Static Capacitance
CO
2.0
25
fC
40
0.032
1
5
Motional Resistance
1.1
dB
20,000
2,400
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model
MHz
±100
Insertion Loss
Temperature Stability
Units
±75
∆fC
RO2156D-1
Quality Factor
Maximum
868.875
<±10
1.0
5, 6, 7, 9
5, 6, 7, 9
Lid Symbolization (in Addition to Lot and/ or Date Code)
°C
kHz
ppm/°C2
ppm/yr
MΩ
15
Ω
50
µH
0.7
fF
2.3
pF
433 / YWWD
Standard Reel Quanitity
3000 Pieces / Reel
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
3.
4.
5.
6.
Lifetime (10 year) frequency aging.
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.
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 for all specifications.
The design, manufacturing process, and specifications of this device are subject to change without notice.
7.
8.
9.
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.
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].
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.
E-mail: [email protected]
Page 1 of 2
http://www.rfm.com
RO2156D_RO2156D-1_RO2156D-2 _090503
868.95 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
C
G
H
Typical Low-Power Transmitter Application
200k Ω
6
1
6
A 2
5
3
4
E
5
2
4
3
+9VDC
Modulation
Input
1
C1
(Antenna)
1
6
D
47
L1
I
2
3
5
4
J
C2
ROXXXXC
Bottom View
RF Bypass
470
Typical Local Oscillator Application
Case Dimensions
Dimension
A
B
C
D
E
G
H
I
J
Min
3.60
3.60
1.00
0.95
2.39
0.90
1.90
0.50
1.70
Output
200k Ω
+VDC
mm
Nom
3.80
3.80
1.20
1.10
2.54
1.0
2.0
0.6
1.8
Max
4.0
4.0
1.40
1.25
2.69
1.10
2.10
0.70
1.90
Min
0.14
0.14
0.04
0.037
0.090
0.035
0.75
0.020
0.067
Inches
Nom
0.15
0.15
0.05
0.043
0.10
0.04
0.08
0.024
0.07
C1
+VDC
L1
Max
0.16
0.16
0.055
0.05
0.110
0.043
0.83
0.028
0.075
1
6
2
3
5
4
C2
ROXXXXC
Bottom View
RF Bypass
Equivalent LC Model
0.05 pF*
Typical Test Circuit
Co = Cp + 0.05 pF
Cp
The test circuit inductor, LTEST, is tuned to resonate with the static
capacitance, CO, at FC.
Electrical Test
Rm
Lm
*Case Parasitics
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
6
1
5
2
4
3
To 50 Ω
Network Analyzer
-50
-50
-100
-100
-150
-150
(f-fo ) / fo (ppm)
From 50 Ω
Network Analyzer
0
-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
RO2156D_RO2156D-1_RO2156D-2 _090503