RO2149 Datasheet, PDF (2/2 Pages) RF Monolithics, Inc – 311.063 MHz SAW Resonator

311.063 MHz
SAW Resonator
Electrical Connections
This one-port, two-terminal SAW resonator is bidirectional. The terminals
are interchangeable with the exception of circuit board layout.
Pin
Connection
1
Terminal 1
2
Terminal 2
3
Case Ground
Bottom View
Pin 1
Pin 2
Pin 3
Typical Test Circuit
The test circuit inductor, L_TEST, is tuned to resonate with the static capaci-
tance, C_O at F_C.
Electrical Test:
Ω
Network
1
Analyzer
Ω
2
Network
Analyzer
3
Power Test:
PINCIDENT
1
50 Ω
Low-Loss
Source at
F_C
P_REFLECTED
Matching
Network
to 50 Ω
3
2
CW RF Power Dissipation =
P
INCIDENT
-
P
REFLECTED
Typical Application Circuits
Typical Low-Power Transmitter Application:
200k Ω
Modulation
MPS-H10
Input
C1
1
2
ROXXXX
Bottom View
C2
3
470
+9VDC
47
L1
(Antenna)
RF Bypass
Typical Local Oscillator Application:
+VDC
1
ROXXXX
Bottom View
C1
2
C2
3
Output
L1
+VDC
RF Bypass
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
0
-50
-50
-100
-100
-150
-150
-200
-200
-80 -60 -40 -20 0 +20 +40 +60 +80
∆T = T_C - T_O ( °C )
Equivalent LC Model
The following equivalent LC model is valid near resonance:
1
2
Cp
RM L_M CM
0.5 pF*
Co= Cp +0.25 pF*
*Case Parasitics
0.5 pF*
3
Case Design
C
G
B
H
F
A
E
D
(3 places)
J
(2 places)
45°
Dimensions
A
B
C
D
E
F
G
H
J
Millimeters
Min
Max
9.40
3.18
2.50
3.50
0.46 Nominal
5.08 Nominal
2.54 Nominal
2.54 Nominal
1.02
1.40
Inches
Min
Max
0.370
0.125
0.098
0.138
0.018 Nominal
0.200 Nominal
0.100 Nominal
0.100 Nominal
0.040
0.055
RF Monolithics, Inc. Phone: [phone]
Fax: [phone]
RFM Europe
Phone: [phone]
Fax: [phone]
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [e-mail]
http://www.rfm.com
RO2149-102799
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