RO2073A RFM [RF Monolithics, Inc], RO2073A Datasheet - Page 2

• Manufacturer Part Number: RO2073A
• Description: 315.0 MHz SAW Resonator
• Manufacturer: RFM [RF Monolithics, Inc]

Electrical Connections
The SAW resonator is bidirectional and may be in-
stalled 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 recommend-
ed to help reduce parasitic capacitance in the cir-
cuit.
Typical Test Circuit
The test circuit inductor, L
tance, C
Typical Application Circuits
315.0 MHz
RF Monolithics, Inc.
RFM Europe
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
ELECTRICAL TEST
O
, at F
Typical Low-Power Transmitter Application
Modulation
Typical Local Oscillator Application
Bottom View
Bottom View
ROXXXXA
ROXXXXA
C
+VDC
From 50
Network Analyzer
.
Input
Phone: [phone]
Phone: [phone]
200k
TEST
, is tuned to resonate with the static capaci-
470
C1
C1
C2
C2
SAW Resonator
(Antenna)
RF Bypass
RF Bypass
To 50
Network Analyzer
NC
L1
L1
+9VDC
+VDC
Output
Terminal
Terminal
47
Fax: [phone]
Fax: [phone]
NC
Equivalent LC Mode
Temperature Characteristics
The curve shown on the right
accounts for resonator contri-
bution only and does not in-
clude LC component tempera-
ture contributions
Typical Circuit Board
Land Pattern
The circuit board land pattern shown below is one possible design. The op-
timum land pattern is dependent on the circuit board assembly process
which varies by manufacturer. The distance between adjacent land edges
should be at a maximum to minimize parasitic capacitance. Trace lengths
from terminal lands to other components should be short and wide to mini-
mize parasitic series inductances.
Case Design
The case material is black alumina with contrasting symbolization. All pads
are nominally centered with respect to the base and consist of 40 to
70 microinches electroless gold on 60-350 micorinches electroless nickel.
Dimensions
M
A
B
C
D
E
G
H
K
N
P
F
.
0.94
0.83
1.16
0.94
0.43
0.43
0.38
Min
Rm
Millimeters
l
Lm
E-mail: [e-mail]
http://www.rfm.com
RO2073A-060801
(4 Places)
0.05 pF*
Typical Dimension:
0.010 to 0.047 inch
(0.25 to 1.20 mm)
C p
Max
5.97
3.94
2.16
1.10
1.20
1.53
1.10
0.59
0.59
5.31
0.64
3.28
Cm
-100
-150
-200
-50
0
-80 -60 -40 -20
C o
T = T
0.037
0.033
0.046
0.037
0.017
0.017
0.015
Min
=
C p
*Case Parasitics
C
+
- T
Inches
0 +20 +40 +60
0.05 pF
O
f
( °C )
C
= f
0.235
0.155
0.085
0.043
0.047
0.060
0.043
0.023
0.023
0.209
0.025
0.129
Max
O
, T
Page 2 of 2
C
+80
= T
0
-50
-100
-150
-200
O