RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
E-mail: info@rfm.com
Page 1 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RF1355-010505
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Nominal Frequency
f
C
1, 2
389.900
390.100
MHz
Tolerance from 390.0 MHz
f
C
100
kHz
Insertion Loss
IL
1
5.0
dB
3 dB Bandwidth
BW
3
1, 2
330
550
kHz
Rejection
at fc -21.4 MHz (Image)
1
40
dB
at fc -10.7 MHz (LO)
15
Temperature
Operating Case Temperature
T
C
3,4
-35
+85
C
Turnover Temperature
T
O
25
C
Turnover Frequency
f
O
f
C
MHz
Freq. Temp. Coefficient
FTC
0.032
ppm/C
2
Frequency Aging
Absolute Value during the First Year
[fA]
5
10
ppm/yr
Lid Symbolization (in addition to Lot and / or Date Codes)
RFM RF1355
TO39-3 Case
Ideal for 390.0 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
Complies with Directive 2002/95/EC (RoHS)
The RF1355 is a true one-port. surface-acoustic-wave (SAW) filter in a low-profile TO39 case. It provides
reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmiters operating at
390.0 MHz.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation (See: Typical Test Circuit)
+5
dBm
DC Voltage Between Any Two Pins (Observe ESD Precautions)
30
VDC
Case Temperature
-40 to +85
C
390.0 MHz
SAW Filter
RF1355
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Frequency aging is the change in f
C
with time and is specified at +65C or less. Aging may exceed the specification for prolonged temperatures above +65C. Typically,
aging is greatest the first year after manufacture, decreasing significantly in subsequent years.
2.
The center frequency, f
C
, is measured at the minimum insertion loss point, IL
MIN
, with the resonator in the 50
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 less than the resonator f
C
.
3.
One or more of the following United States patents apply: 4,454,488 and 4,616,197 and others pending.
4.
Typically, equipment designs utilizing this device require emissions testing and government approval, which is the responsibility of the equipment manufacturer.
5.
Unless noted otherwise, case temperature T
C
= +25C2C.
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
]. Typically,
oscillator T
O
is 20C less than 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 (nonmo-
tional) capacitance between pin1 and pin 2 measured at low frequency (10 MHz) with a capacitance meter. The measurement includes case parasitic capacitance with a
floating case. For usual grounded case applications (with ground connected to either pin 1 or pin 2 and to the case), add approximately 0.25 pF to C
O
.
Pb
390.0 MHz SAW Filter
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
E-mail: info@rfm.com
Page 2 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RF1355-010505
Electrical Connections
This one-port, two-terminal SAW resonator is bidirectional. The terminals
are interchangeable with the exception of circuit board layout.
Typical Test Circuit
The test circuit inductor, L
TEST
, is tuned to resonate with the static capaci-
tance, C
O
at F
C
.
Typical Application Circuits
Temperature Characteristics
Equivalent LC Model
The following equivalent LC model is valid near resonance:
Case Design
Pin
Connection
1
Terminal 1
2
Terminal 2
3
Case Ground
Network
Analyzer
Network
Analyzer
Electrical Test:
1
2
3
50
Source at
FC
Low-Loss
Matching
Network
50
to
Power Test:
P
P
INCIDENT
INCIDENT
CW RF Power Dissipation =
-
REFLECTED
REFLECTED
P
P
3
2
1
MPS-H10
+9VDC
47
RF Bypass
L1
C1
C2
200k
Modulation
Input
ROXXXX
Bottom View
470
Typical Low-Power Transmitter Application:
1
2
3
(Antenna)
+VDC
RF Bypass
L1
C2
ROXXXX
Bottom View
Typical Local Oscillator Application:
1
2
3
Output
+VDC
C1
Dimensions
Millimeters
Inches
Min
Max
Min
Max
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
The curve shown on the right
accounts for resonator contri-
bution only and does not in-
clude oscillator 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
T =
T
C
- T
O
( C )
(f-
f o
o
) /
f
(ppm
)
0.5 pF*
0.25 pF*
Cp
Co=
+
*Case Parasitics
R
L
C
0.5 pF*
Cp
1
2
3
M
M
M
B
45
J
(2 places)
D
(3 places)
H
G
E
F
C
A
Bottom View
Pin 1
Pin 2
Pin 3
PDF 
ZIP