418.0 MHz
Electrical Connections
SAW Resonator
Temperature Characteristics
The curve shown on the right
accounts for resonator contri-
bution only and does not in-
clude oscillator temperature
characteristics.
f
C
= f
O
, T
C
= T
O
0
(f-fo ) / fo (ppm)
This one-port, two-terminal SAW resonator is bidirectional. The terminals
are interchangeable with the exception of circuit board layout.
Pin
1
2
3
Connection
Terminal 1
Terminal 2
Case Ground
Pin 3
Pin 1
Bottom View
Pin 2
0
-50
-100
-150
-200
0 +20 +40 +60 +80
-50
-100
-150
-200
-80 -60 -40 -20
Typical Test Circuit
The test circuit inductor, L
TEST
, is tuned to resonate with the static capaci-
tance, C
O
at F
C
.
∆
T = T
C
- T
O
( °C )
Electrical Test:
Ω
Network
Analyzer
1
2
Equivalent LC Model
The following equivalent LC model is valid near resonance:
Ω
Network
Analyzer
1
2
Cp
Co= Cp + 0.25 pF*
*Case Parasitics
3
R
M
L
M
C
M
0.5 pF*
0.5 pF*
Power Test:
3
P
INCIDENT
1
Low-Loss
Matching
Network
to 50
Ω
50
Ω
Source at
P
REFLECTED
F
C
3
Case Design
2
B
C
G
CW RF Power Dissipation =
-P
P
INCIDENT
REFLECTED
H
Typical Application Circuits
Typical Low-Power Transmitter Application:
200k
Ω
F
A
D
(3 places)
J
(2 places)
+9VDC
E
Modulation
Input
MPS-H10
47
C1
45°
L1
1
2
(Antenna)
Millimeters
Dimensions
Min
Max
9.40
3.18
2.50
3.50
0.098
0.46 Nominal
5.08 Nominal
2.54 Nominal
2.54 Nominal
1.02
1.40
0.055
Min
Inches
Max
0.370
0.125
0.138
0.018 Nominal
0.200 Nominal
0.100 Nominal
0.100 Nominal
0.040
C2
ROXXXX
Bottom View
3
470
RF Bypass
A
B
C
D
E
Typical Local Oscillator Application:
Output
C1
1
2
+VDC
L1
F
G
H
J
+VDC
C2
ROXXXX
Bottom View
3
RF Bypass
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
RO2103-102599
Page 2 of 2
RFM [ RF MONOLITHICS, INC ]
