RO2173A-1 [RFM]
980.0 MHz SAW Resonator; 980.0 MHz的SAW谐振器
| 型号： | RO2173A-1 |
| 厂家： | 
RF MONOLITHICS, INC |
| 描述： | 980.0 MHz SAW Resonator |
| 文件： | 总2页 (文件大小：97K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
RO2101A-6
•
•
•
Ideal for European 433.92 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Surface-Mount Ceramic Case with 21 mm2 Footprint
Complies with Directive 2002/95/EC (RoHS)
433.92 MHz
SAW
•
•
Resonator
The RO2101A-6 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 433.92 MHz. This resonator is designed specifically for remote-control and wireless security transmit-
ters operating in Europe under ETSI I-ETS 300 220.
Absolute Maximum Ratings
Rating
Value
+0
Units
dBm
VDC
°C
CW RF Power Dissipation (See: Typical Test Circuit)
DC voltage Between Terminals (Observe ESD Precautions)
Case Temperature
±30
-40 to +105
260
SM-2 Case
Soldering Temperature (10 seconds / 5 cycles max.)
°C
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
f
Center Frequency (+25 °C)
Absolute Frequency
433.87
433.970
MHz
C
2,3,4,5
Df
Tolerance from 433.920 MHz
±50
2.0
kHz
dB
C
Insertion Loss
Quality Factor
IL
2,5,6
5,6,7
1.1
14,300
1,700
25
Q
Unloaded Q
U
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
10
1.0
1.5
40
°C
O
f
f
6,7,8
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
0.032
ppm/°C
|f |
Frequency Aging
1
5
±50
26
ppm/yr
MW
W
A
DC Insulation Resistance between Any Two Terminals
R
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
13
69.4594
1.93682
1.8
M
L
5, 7, 9
µH
M
C
fF
M
C
5, 6, 9
2, 7
2.1
pF
O
L
Test Fixture Shunt Inductance
75
nH
TEST
Lid Symbolization (in addition to Lot and/or Date Codes)
159
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Frequency aging is the change in fC with time and is specified at +65°C or less.
8.
Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-
lated 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 reso-
nant 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 para-
sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is
approximately 0.05 pF. Transducer parallel capacitance can by calculated as:
Aging may exceed the specification for prolonged temperatures above +65°C.
Typically, aging is greatest the first year after manufacture, decreasing in subse-
quent years.
The center frequency, fC, is measured at the minimum insertion loss point,
9.
ILMIN, with the resonator in the 50 W test system (VSWR £ 1.2:1). The shunt
inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOS-
CILLATOR 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 govern-
ment 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.
3.
4.
C
P » CO - 0.05 pF.
5.
6.
7.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
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
RO2101A-6-061901
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
433.92 MHz
SAW Resonator
Electrical Connections
Equivalent LC Model
Terminal
The SAW resonator is bidirectional and may be in-
stalled 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 recommend-
ed to help reduce parasitic capacitance in the cir-
cuit.
0.05 pF*
NC
NC
+
C
=
C
o
0.05 pF
p
C
p
*Case Parasitics
Terminal
Lm
Cm
Rm
Temperature Characteristics
The curve shown on the right
fC = fO , T C = TO
0
0
Typical Test Circuit
accounts for resonator contri-
-50
bution only and does not in-
-100
-50
The test circuit inductor, L
, is tuned to resonate with the static capaci-
TEST
-100
-150
-200
tance, C , at F .
O
C
clude LC component tempera-
-150
ture contributions.
-200
-80 -60 -40 -20
0
+20 +40 +60 +80
ELECTRICAL TEST
Typical Circuit Board
Land Pattern
The circuit board land pattern shown below is one possible design. The op-
timum land pattern is dependent on the circuit board assembly process
which varies by manufacturer. The distance between adjacent land edges
should be at a maximum to minimize parasitic capacitance. Trace lengths
from terminal lands to other components should be short and wide to mini-
mize parasitic series inductances.
T = TC - TO ( °C )
D
W
W
From 50
To 50
Network Analyzer
Network Analyzer
(4 Places)
Typical Dimension:
0.010 to 0.047 inch
(0.25 to 1.20 mm)
Case Design
The case material is black alumina with contrasting symbolization. All pads
are nominally centered with respect to the base and consist of 40 to
70 microinches electroless gold on 60-350 micorinches electroless nickel.
Typical Application Circuits
Typical Low-Power Transmitter Application
+9VDC
47
200k
W
Modulation
Input
C1
L1
(Antenna)
C2
ROXXXXA
Bottom View
Millimeters
Inches
RF Bypass
Dimensions
Min
Max
Min
Max
470
A
B
C
D
E
F
5.74
3.73
1.91
0.94
0.83
1.16
0.94
0.43
0.43
5.08
0.38
3.05
5.99
3.99
2.16
1.10
1.20
1.53
1.10
0.59
0.59
5.33
0.64
3.30
0.226
0.147
0.075
0.037
0.033
0.046
0.037
0.017
0.017
0.200
0.015
0.120
0.236
0.157
0.085
0.043
0.047
0.060
0.043
0.023
0.023
0.210
0.025
0.130
Typical Local Oscillator Application
Output
+VDC
+VDC
C1
G
H
K
M
N
P
L1
C2
ROXXXXA
Bottom View
RF Bypass
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
RO2101A-6-061901
Page 2 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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