RO3115A Datasheet, PDF (2/2 Pages) Murata Manufacturing Co., Ltd. – 417.5 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.
Terminal
Terminal
Typical Test Circuit
The test circuit inductor, L_TEST, is tuned to resonate with the static
capacitance, C_O, at F_C.
ELECTRICAL TEST
From 50 Ω
Network Analyzer
To 50 Ω
Network Analyzer
POWER TEST
P _INCIDENT
50 Ω Source
at F_C
PREFLECTED
Low-Loss
Matching
Network to
50 Ω
Terminal
NC
NC
Terminal
CW RF Power Dissipation = ^P INCIDENT - ^P REFLECTED
Typical Application Circuits
Typical Low-Power Transmitter Application
+9VDC
200k Ω
Modulation
Input
47
C1
L1
(Antenna)
RO3XXXA
Bottom View
C2
470
RF Bypass
Typical Local Oscillator Applications
+VDC
C1
L1
Output
+VDC
RO3XXXA
Bottom View
C2
RF Bypass
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© 2009-2011 by RF Monolithics, Inc.
Equivalent Model
0.05 pF*
Cp
Co= Cp +0.05 pF
*Case Parasitics
Rm Lm Cm
Temperature Characteristics
The curve shown on the right
accounts for resonator
contribution only and does not
include LC component
temperature contributions.
Case
f_C = f_O , T_C = T_O
0
0
-50
-50
-100
-100
-150
-150
-200
-200
-80 -60 -40 -20 0 +20 +40 +60 +80
∆T = TC - TO ( °C )
T o p V ie w
B
S id e V ie w
C
B o tto m V ie w
E (3 x )
4
1
3
2
F (4 x )
G (1 x )
D
H
I
J
K
L
H M JM H
PCB Land Pattern
Top View
Dimensions
A
B
C
D
E
F
G
H
I
J
K
L
M
Millimeters
Min Nom Max
4.87 5.00 5.13
3.37 3.50 3.63
1.45 1.53 1.60
1.35 1.43 1.50
0.67 0.80 0.93
0.37 0.50 0.63
1.07 1.20 1.33
-
1.04
-
-
1.46
-
-
0.50
-
-
1.05
-
-
1.44
-
-
0.71
-
Min
0.191
0.132
0.057
0.040
0.026
0.014
0.042
-
-
-
-
-
-
Inches
Nom
0.196
0.137
0.060
0.057
0.031
0.019
0.047
0.041
0.058
0.019
0.041
0.057
0.028
Max
0.201
0.142
0.062
0.059
0.036
0.024
0.052
-
-
-
-
-
-
Page 2 of 2
RO3115A - 6/29/11