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RF Monolithics Inc

RO2112 Datasheet Preview

RO2112 Datasheet

433.42 MHz SAW Resonator

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®
• Ideal for European 433.92 MHz Superhet Receiver LOs
• Very Low Series Resistance
• Quartz Stability
• Rugged, Hermetic, Low-Profile TO39 Case
The RO2112 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-
vides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at approxi-
mately 433.42 MHz. The RO2112 is designed for IC based 433.92 MHz superhet receivers with 500 kHz IF
(Philips UAA3201T). Applications include remote-control and wireless security devices operating in Europe
under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100.
RO2112
433.42 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
CW RF Power Dissipation (See: Typical Test Circuit)
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
Value
+0
±30
-40 to +85
Units
dBm
VDC
°C
TO39-3 Case
Electrical Characteristics
Characteristic
Center Frequency (+25 °C) Absolute Frequency
Tolerance from 433.420 MHz
Insertion Loss
Quality Factor
Unloaded Q
50 Loaded Q
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
Absolute Value during the First Year
DC Insulation Resistance between Any Two Pins
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Pin 1 to Pin 2 Static Capacitance
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization (in Addition to Lot and/or Date Codes)
Sym
fC
fC
IL
QU
QL
TO
fO
FTC
|fA|
RM
LM
CM
CO
CP
LTEST
Notes
2, 3, 4, 5
2, 5, 6
5, 6, 7
6, 7, 8
1
5
5, 7, 9
5, 6, 9
5, 6, 7, 9
2, 7
Minimum
433.345
Typical
1.3
10,800
1,300
20 35
fc +1.6
0.037
≤10
1.0
16
63.4534
2.12504
2.0 2.3
2.0
60
RFM RO2112
Maximum
433.495
±75
1.5
Units
MHz
kHz
dB
50 °C
kHz
ppm/°C2
ppm/yr
M
19
µH
fF
2.6 pF
pF
nH
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency aging is the change in fC with time and is specified at +65°C or less.
Aging may exceed the specification for prolonged temperatures above +65°C.
Typically, aging is greatest the first year after manufacture, decreasing signifi-
cantly in subsequent years.
2. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN,
with the resonator in the 50 test system (VSWR 1.2:1). The shunt induc-
tance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLA-
TOR or fTRANSMITTER is less than the resonator fC.
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 TC = +25°C±2°C.
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: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
8. Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-
lated from: f = fO [1 - FTC (TO -TC)2]. Typically, oscillator TO is 20°C less than
the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the reso-
nant frequency and is provided for reference only. The capacitance CO is the
static (nonmotional) capacitance between pin1 and pin 2 measured at low fre-
quency (10 MHz) with a capacitance meter. The measurement includes case
parasitic capacitance with a floating case. For usual grounded case applica-
tions (with ground connected to either pin 1 or pin 2 and to the case), add
approximately 0.25 pF to CO.
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
RO2112-102699
Page 1 of 2




RF Monolithics Inc

RO2112 Datasheet Preview

RO2112 Datasheet

433.42 MHz SAW Resonator

No Preview Available !

433.42 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, LTEST, is tuned to resonate with the static capaci-
tance, CO at FC.
Electrical Test:
Network
Analyzer
1
2 Network
Analyzer
3
Power Test:
50
Source at
FC
PINCIDENT
PREFLECTED
Low-Loss
Matching
Network
to 50
3
1
2
CW RF Power Dissipation =
P
INCIDENT
-
P
REFLECTED
Typical Application Circuits
Typical Low-Power Transmitter Application:
200k
Modulation
MPS-H10
Input
C1
12
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.
fC = fO , TC = T O
00
-50 -50
-100
-100
-150
-150
-200
-200
-80 -60 -40 -20 0 +20 +40 +60 +80
T = TC - TO ( °C )
Equivalent LC Model
The following equivalent LC model is valid near resonance:
12
Cp
RM LM CM
0.5 pF*
Co= Cp +0.25 pF*
*Case Parasitics
0.5 pF*
3
Case Design
C
B
G
F
AE
D
(3 places)
J
(2 places)
H
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: (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
RO2112-102699
Page 2 of 2


Part Number RO2112
Description 433.42 MHz SAW Resonator
Maker RF Monolithics Inc
Total Page 2 Pages
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