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| 型号： | RO2193A |
| 厂商： | RF MONOLITHICS INC |
| 元件分类： | SAW谐振器 |
| 英文描述： | 1-PORT SAW RESONATOR, 379.3 MHz |
| 封装： | ROHS COMPLIANT, HERMETIC, CERAMIC, CASE SM-2, 4 PIN |
| 文件页数： | 2/2页 |
| 文件大小： | 114K |
| 代理商： | RO2193A |
www.RFM.com
E-mail: info@rfm.com
Page 2 of 2
2008 by RF Monolithics, Inc.
RO2193A - 3/26/08
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.
Typical Test Circuit
The test circuit inductor, LTEST, is tuned to resonate with the static
capacitance, CO, at FC.
Typical Application Circuits
Equivalent LC Model
Temperature Characteristics
The curve shown on the right
accounts for resonator
contribution only and does not
include LC component
temperature contributions.
Typical
Circuit
Board
Land Pattern
The circuit board land pattern
shown below is one possible
design. The optimum 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 minimize parasitic series inductances.
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.
NC
Terminal
From 50
Ω
Network Analyzer
To 50
Ω
ELECTRICAL TEST
+9VDC
47
RF Bypass
L1
(Antenna)
C1
C2
200k
Ω
Modulation
Input
ROXXXXA
Bottom View
470
Typical Low-Power Transmitter Application
RF Bypass
L1
C1
C2
ROXXXXA
Bottom View
Typical Local Oscillator Application
+VDC
Output
Dimensions
Millimeters
Inches
Min
Max
Min
Max
A
5.74
5.99
0.226
0.236
B
3.73
3.99
0.147
0.157
C
1.70
2.29
0.067
0.090
D
0.94
1.10
0.037
0.043
E
0.83
1.20
0.033
0.047
F
1.16
1.53
0.046
0.060
G
0.94
1.10
0.037
0.043
H
0.43
0.59
0.017
0.023
K
0.43
0.59
0.017
0.023
M
5.08
5.33
0.200
0.210
N
0.38
0.64
0.015
0.025
P
3.05
3.30
0.120
0.130
0.05 pF*
0.05 pF
Cp
Co
+
=
*Case Parasitics
Cp
Rm
Lm
Cm
-80 -60 -40 -20
0 +20 +40 +60
0
-50
-100
-150
+80
-200
0
-50
-100
-150
-200
f
C = f O , T C = T O
ΔT = T
C - T O ( °C )
(f
-f
o
) /
f
(p
p
m
)
Typical Dimension:
0.010 to 0.047 inch
(0.25 to 1.20 mm)
(4 Places)
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