The RS TO39-3 Series of Two-Port SAW Resonators
Typical Test Circuit
The test circuit inductor, L
TEST
, is used to resonate with
the static capacitance, C
O
(which is measured at low
frequency with a capacitance meter).
Case Design
Electrical Connections
Either pin 1 or pin 2 may be used for input or output with
these bidirectional, two-port, three-terminal, SAW
resonators. However, impedances and circuit board
parasitics may not be symmetrical, requiring slightly
different oscillator component values for different resonator
connections.
Pin
Connection
1
Input or Output
2
Output or Input
3
Case Ground
Typical Application Circuits
The following circuit illustrates a basic oscillator topology.
This resonator is suitable for oscillator designs requiring 0
phase shift at resonance in a two-port configuration.
Equivalent LC Model
The following equivalent LC model is valid near resonance:
1
3
Rm Lm Cm
Co
Co
2
Dimension
Millimeters
Inches
Minimum Maximum Minimum Maximum
A
9.30
0.366
B
3.18
0.125
C
2.50
3.50
0.098
0.138
D
0.46 Nominal
0.018 Nominal
E
5.08 Nominal
0.200 Nominal
F
2.54 Nominal
0.100 Nominal
G
2.54 Nominal
0.100 Nominal
H
1.02
0.040
J
1.40
0.055
1
2
3
Phasing
& Match
Phasing
& Match
Bottom View
Pin 2
Pin 3
Pin 1
B
45
J
(2 places)
D
(3 places)
H
G
E
F
C
A
1-98
Temperature Characteristics
The curve shown on
the right accounts
for resonator contri-
bu tio n o nl y a nd
does not include os-
cillator temperature
characteristics.
-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
D
T = T
C
- T
O
( C )
( f - f
O
) / f
O
( ppm )
SAW
Resonator
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation (See: Typical Test Circuit.)
dBm
DC Voltage between Any Two Pins (Observe ESD Precautions.)
30
VDC
Case Temperature
1
C
Electrical Characteristics
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 above
+
65
C. Typically, aging is greatest the first year after manufacture, decreasing in subsequent years.
2.
The frequency f
C
is the frequency of minimum IL with the resonator in the specified test fixture in a 50
test system with VSWR
1.2:1.
3.
One or more of the following United States patents apply: 4,454,488; 4,616,197.
4.
Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer.
5.
Unless noted otherwise, case temperature T
C
=
+
25
C
2
C.
6.
The design, manufacturing process, and specifications of this device are subject to change without notice.
7.
Derived mathematically from one or more of the following directly measured parameters: f
C
, IL, 3 dB bandwidth, f
C
versus T
C
, and C
O
.
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
].
9.
This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance C
O
is the
measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case parasitic capacitance.
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency (
+
25
C) Absolute Frequency
Tolerance from
f
C
2, 3, 4, 5
MHz
f
C
kHz
Insertion Loss
IL
2, 5, 6
dB
Quality Factor
Unloaded Q
50
Loaded Q
Q
U
5, 6, 7
Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
T
O
6, 7, 8
C
f
O
FTC
ppm/
C
2
Frequency Aging
Absolute Value during the First Year
|
f
A
|
6
10
ppm/yr
DC Insulation Resistance between Any Two Pins
5
1.0
M
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
R
M
5, 7, 9
L
M
H
C
M
fF
C
O
5, 6, 9
pF
Lid Symbolization (in Addition to Lot and/or Date Codes)
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
TO39-3 Case
1-99
RS1033-5
668.1 MHz
Designed for 668.0 MHz CATV Converter LOs
Nominal Insertion Phase Shift of 0
at Resonance
The RS1033-5 is a two-port surface-acoustic-wave (SAW) resonator in a low-profile
TO39 case. It provides reliable, fundamental-mode, quartz frequency stabilization of
fixed-frequency oscillators operating at or near 668 MHz. Typical applications include
the second LO in CATV set-top convertors with channel 2 output.
+
5
-
40 to
+
85
668.100 MHz
668.000
668.200
100
8.5
12.5
9,300
5,800
50
65
80
f
C
+
41
kHz
0.037
165
322
368.537
0.153984
1.3
1.6
1.9
RFM 1033-5
Typically, f
OSCILLATOR
or f
TRANSMITTER
is less than the resonator f
C
.
Typically, oscillator T
O
is 20 less than the specified resonator T
O
.
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