RO2188A [RFM]
390.0 MHz SAW Resonator; 390.0 MHz的SAW谐振器
| 型号： | RO2188A |
| 厂家： | 
RF MONOLITHICS, INC |
| 描述： | 390.0 MHz SAW Resonator |
| 文件： | 总2页 (文件大小：95K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
RO2188A
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Ideal for 390.0 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Rugged, Hermetic, Surface Mount SM-2 Package
Complies with Directive 2002/95/EC (RoHS)
390.0 MHz
SAW
Resonator
The RO2188 is a true one-port, surface-acoustic-wave (SAW) resonator in SM-2 case. It provides reliable,
fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 390.0 MHz.
Absolute Maximum Ratings
Rating
Value
+5
Units
dBm
VDC
°C
CW RF Power Dissipation
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
±30
-40 to +85
260
Soldering Temperature (10 seconds / 5 cycles max.)
°C
SM-2 Case
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency at +25 °C
Absolute Frequency
f
389.900
390.100
MHz
kHz
dB
C
2, 3, 4, 5
Tolerance from 304.0 MHz
Df
±100
2.0
C
Insertion Loss
Quality Factor
IL
0.9
12,000
1,200
42
2, 5, 6
5, 6, 7
Unloaded Q
Q
U
50 W Loaded Q
Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
T
f
27
1.0
3.6
57
°C
O
f -5
6, 7, 8
kHz
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
|fA|
0.037
ppm/°C
Frequency Aging
£10
ppm/yr
MW
W
1
5
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model
Motional Resistance
R
L
11
54.963
3.0299
3.9
26
M
Motional Inductance
µH
5, 7, 9
M
Motional Capacitance
C
fF
M
O
Pin 1 to Pin 2 Static Capacitance
Transducer Static Capacitance
C
5, 6, 9
5, 6, 7, 9
2, 7
4.2
pF
C
3.65
43
pF
P
Test Fixture Shunt Inductance
Lid Symbolization
L
TEST
nH
E319
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Lifetime (10 year) frequency aging.
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
The center frequency, fC, is measured at the minimum insertion loss point,
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-
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.
culated from: f = fO [1 - FTC (TO -TC)2].
3.
4.
One or more of the following United States patents apply: 4,454,488 and
4,616,197.
9.
This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance CO is
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.
the static (nonmotional) capacitance between the two terminals measured at
low frequency (10 MHz) with a capacitance meter. The measurement
includes parasitic capacitance with a floating case. Case parasitic capaci-
tance is approximately 0.25pF. Transducer parallel capacitance can be cal-
culated as: CP » CO - 0.25pF.
5.
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
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-9148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
RO2188A-062001
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
390.0 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
5.97
3.94
2.16
1.10
1.20
1.53
1.10
0.59
0.59
5.31
0.64
3.28
0.235
0.155
0.085
0.043
0.047
0.060
0.043
0.023
0.023
0.209
0.025
0.129
Typical Local Oscillator Application
0.94
0.83
1.16
0.94
0.43
0.43
0.037
0.033
0.046
0.037
0.017
0.017
Output
+VDC
+VDC
C1
G
H
K
M
N
P
L1
C2
ROXXXXA
0.38
0.015
Bottom View
RF Bypass
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-9148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
RO2188A-062001
Page 2 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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