RO3125A [MURATA]
1-PORT SAW RESONATOR, 304.3 MHz, ROHS COMPLIANT, CERAMIC, CASE SM5035-4, 4 PIN;
| 型号： | RO3125A |
| 厂家： | 
muRata |
| 描述： | 1-PORT SAW RESONATOR, 304.3 MHz, ROHS COMPLIANT, CERAMIC, CASE SM5035-4, 4 PIN 晶体 谐振器 |
| 文件： | 总2页 (文件大小：49K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RO3125A
•
•
•
•
•
Ideal for 304.3 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Surface-Mount Ceramic Case
Complies with Directive 2002/95/EC (RoHS)
304.3 MHz
SAW
Pb
Resonator
The RO3125A 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 304.3 MHz.
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 +85
260
SM5035-4
Soldering Temperature (10 seconds / 5 cycles max.)
°C
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
f
Center Frequency (+25 °C)
Absolute Frequency
304.225
304.375
MHz
kHz
dB
C
2,3,4,5
Df
Tolerance from 304.3 MHz
±75
1.5
C
Insertion Loss
Quality Factor
IL
2,5,6
5,6,7
1.0
16290
1413
25
Q
Unloaded Q
U
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
10
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
£10
ppm/yr
MW
W
A
DC Insulation Resistance between Any Two Terminals
1.0
R
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
9.5
80.9
3.3
M
L
5, 7, 9
µH
M
C
fF
M
C
5, 6, 9
2, 7
3.1
pF
O
L
Test Fixture Shunt Inductance
87.5
nH
TEST
Lid Symbolization (in addition to Lot and/or Date Codes)
787 // YWWS
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.
10. Tape and Reel standard per ANSI / EIA 481.
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
RO3125A-12/7/07
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
304.3 MHz
SAW Resonator
Electrical Connections
Equivalent LC Model
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.
Terminal
0.05 pF*
+
C
p
=
C
o
0.05 pF
C
p
*Case Parasitics
Terminal
Lm
Cm
Rm
Temperature Characteristics
The curve shown on the right
fC = fO , TC = 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
+40 +60 +80
+20
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
To 50
Network Analyzer
From 50
Network Analyzer
POWER TEST
(4 Places)
P
Typical Dimension:
0.010 to 0.047 inch
(0.25 to 1.20 mm)
INCIDENT
Terminal
NC
Terminal
Low-Loss
Matching
Network to
W
50 Source
NC
P
at FC
REFLECTED
W
50
Case Design
Top View
Side View
Bottom View
P
P
INCIDENT - REFLECTED
CW RF Power Dissipation =
B
C
Typical Application Circuits
Typical Low-Power Transmitter Application
+9VDC
W
200k
Modulation
Input
47
C1
C2
L1
(Antenna)
RF Bypass
RO3XXXA
D
Bottom View
470
Millimeters
Inches
Dimensions
Min
Nom
Max
Min
Nom
Max
Typical Local Oscillator Applications
A
B
C
D
E
F
4.87
3.37
1.45
1.35
.67
5.0
3.5
5.13
3.63
1.60
1.50
.93
.191
.132
.057
.040
.026
.014
.042
.196
.137
.060
.057
.031
.019
.047
.201
.142
.062
.059
.036
.024
.052
Output
1.53
1.43
.80
+VDC
C1
+VDC
L1
.37
.50
.63
G
1.07
1.20
1.33
C2
RO3XXXA
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
RO3125A-12/7/07
Page 2 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
相关型号：
©2020 ICPDF网 联系我们和版权申明