RO3150A_15 Datasheet, PDF (2/3 Pages) Murata Manufacturing Co., Ltd. – 304.0 MHz SAW Resonator

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1.
Frequency aging is the change in f_C with time and is specified at +65 °C or
less. Aging may exceed the specification for prolonged temperatures
7.
subject to change without notice.
Derived mathematically from one or more of the following directly
above +65 °C. Typically, aging is greatest the first year after manufacture,
measured parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
2.
3.
4.
5.
6.
decreasing in subsequent years.
The center frequency, f_C, is measured at the minimum insertion loss point,
IL_MIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, L_TEST, is tuned for parallel resonance with C_O at f_C.
Typically, f_OSCILLATOR or f_TRANSMITTER is approximately equal to the
resonator f_C.
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
government approval, which is the responsibility of the equipment
manufacturer.
Unless noted otherwise, case temperature T_C = +25 ± 2 °C.
The design, manufacturing process, and specifications of this device are
8. Turnover temperature, T_O, is the temperature of maximum (or turnover)
frequency, f_O. The nominal frequency at any case temperature, T_C, may be
calculated from: f = f_O [1 - FTC (T_O -T_C)²]. Typically oscillator T_O is
approximately equal to the specified resonator T_O.
9. This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance C_O
is the static (nonmotional) capacitance between the two terminals
measured at low frequency (10 MHz) with a capacitance meter. The
measurement includes parasitic capacitance with "NC” pads unconnected.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can by calculated as: C_P ≈ C_O - 0.05 pF.
10. Tape and Reel standard per ANSI / EIA 481.
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
Equivalent RLC Model
C_P
C_S
C P = 0 .0 5 p F (C a s e P a r a s itic s )
C S = S A W S ta tic C a p a c ita n c e
CO= CS+ CP
L_M
C_M
R_M
Temperature Characteristics
The curve shown on the right
accounts for resonator
0
contribution only and does not
-50
include LC component
-100
temperature contributions.
-150
f_C = f_O , T_C = T _O
0
-50
-100
-150
Case
-200
-200
-80 -60 -40 -20 0 +20 +40 +60 +80
ΔT = T_C - T_O ( °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 )
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
200kΩ
Modulation
Input
C1
47
L1
(Antenna)
RO3XXXA
Bottom View
C2
470
RF Bypass
D
H
I
4
1
3
2
F (4 x )
G (1 x )
I
H
H
I
HJ
K
L
PCB Land Pattern
Top View
©2010-2015 by Murata Electronics N.A., Inc.
RO3150A (R) 2/5/15
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