RO2101E Datasheet, PDF (2/2 Pages) RF Monolithics, Inc – The RO2101E is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case.

433.92 MHz
SAW Resonator
Electrical Connections
Pin
The SAW resonator is bidirectional and
1
may be installed with either orientation.
The two terminals are interchangeable
2
and unnumbered. The callout NC indi-
3
cates no internal connection. The NC
4
pads assist with mechanical positioning
5
and stability. External grounding of the
NC pads is recommended to help reduce
6
parasitic capacitance in the circuit.
Connection
NC
Terminal
NC
NC
Terminal
NC
B
C
1
6
G
6
H
1
A2
5
E F5
2I
3
4
4
3
D
J
Case Dimensions
Dimension
mm
Min Nom Max Min
A
2.87 3.0 3.13 0.113
B
2.87 3.0 3.13 0.113
C
1.12 1.25 1.38 0.044
D
0.77 0.90 1.03 0.030
E
2.67 2.80 2.93 0.105
F
1.47 1.6 1.73 0.058
G
0.72 0.85 0.98 0.028
H
1.37 1.5 1.63 0.054
I
0.47 0.60 0.73 0.019
J
1.17 1.30 1.43 0.046
Inches
Nom
0.118
0.118
0.049
0.035
0.110
0.063
0.033
0.059
0.024
0.051
Max
0.123
0.123
0.054
0.040
0.115
0.068
0.038
0.064
0.029
0.056
Typical Test Circuit
The test circuit inductor, L_TEST, is tuned to resonate with the static
capacitance, C_O, at F_C.
Electrical Test
From 50 Ω
Network Analyzer
6
1
5
2
4
3
To 50 Ω
Network Analyzer
Power Test
50 Ω Source
at F _C
P _INCIDENT
P _REFLECTED
Low-Loss
Matching
Network to
50 Ω
2
3
1
6
5
4
Typical Application Circuits
Typical Low-Power Transmitter Application
Modulation
200k Ω
Input
C1
2
3
1
6
5
4
C2
ROXXXXC
Bottom View
470
+VDC
Typical Local Oscillator Application
200k Ω
C1
+9VDC
47
L1
(Antenna)
RF Bypass
Output
+VDC
L1
ROXXXXC
Bottom View
2
3
1
6
5
4
C2
RF Bypass
Equivalent LC Model
0.05 pF*
Cp
Co= Cp + 0.05 pF
*Case Parasitics
Rm Lm Cm
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and
does not include LC component temperature contributions.
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 )
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
RO2101E-061704
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