RO2112A Datasheet, PDF (1/2 Pages) RF Monolithics, Inc – 433.42 MHz SAW Resonator

®
RO2112A
• Ideal for European 433.92 MHz Superhet Receiver LOs
• Very Low Series Resistance
• Quartz Stability
• Surface-Mount, Ceramic Case with 21 mm² Footprint
• Complies with Directive 2002/95/EC (RoHS)
The RO2112A is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case.
It provides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at approx-
imately 433.42 MHz. This SAW is designed for 433.92 MHz superhet receivers with 500 kHz IF (Philips
UAA3201T). Applications include remote-control and wireless security receivers operating in Europe under
ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100.
Absolute Maximum Ratings
Rating
CW RF Power Dissipation (See Typical Test Circuit)
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Value
+0
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
433.42 MHz
SAW
Resonator
SM-2 Case
Electrical Characteristics
Characteristic
Center Frequency (+25 °C) Absolute Frequency
Tolerance from 433.42 MHz
Insertion Loss
Quality Factor
Unloaded Q
50 Ω 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 Terminals
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
Sym
f_C
∆f_C
IL
Q_U
Q_L
T_O
f_O
FTC
|f_A|
R_M
L_M
C_M
C_O
L_TEST
Notes
2, 3, 4, 5
2, 5, 6
5, 6, 7
6, 7, 8
1
5
5, 7, 9
5, 6, 9
2, 7
Minimum
433.345
Typical
1.0
14,000
1,500
10
25
f_C
0.032
≤10
1.0
12
61.6197
2.18828
1.7
2.0
70
102
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
Maximum
433.495
±75
1.5
Units
MHz
kHz
dB
40
°C
ppm/°C²
ppm/yr
MΩ
19
Ω
µH
fF
2.3
pF
nH
1.
Frequency aging is the change in f_C with time and is specified at +65°C or
8.
Turnover temperature, T_O, is the temperature of maximum (or turnover) fre-
less. Aging may exceed the specification for prolonged temperatures above
quency, f_O. The nominal frequency at any case temperature, T_C, may be cal-
2.
+65°C. Typically, aging is greatest the first year after manufacture, decreas-
ing in subsequent years.
The center frequency, f_C, is measured at the minimum insertion loss point,
IL_MIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt
inductance, L_TEST, is tuned for parallel resonance with C_O at f_C. Typically,
9.
culated from: f = f_O [1 - FTC (T_O -T_C)²]. Typically, oscillator T_O is
approximately equal to the specified resonator T_O.
This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance C_O is
the static (nonmotional) capacitance between the two terminals measured at
f_OSCILLATOR or f_TRANSMITTER is approximately equal to the resonator f_C.
low frequency (10 MHz) with a capacitance meter. The measurement
3. One or more of the following United States patents apply: 4,454,488 and
includes parasitic capacitance with “NC” pads unconnected. Case parasitic
4,616,197.
capacitance is approximately 0.05 pF. Transducer parallel capacitance can
4.
Typically, equipment utilizing this device requires emissions testing and gov-
ernment approval, which is the responsibility of the equipment manufacturer.
be calculated as: C_P ≈ C_O - 0.05 pF.
10. Packaged in 500PC Tape carrier.
5.
Unless noted otherwise, case temperature T_C = +25°C±2°C.
6. The design, manufacturing process, and specifications of this device are sub-
ject to change without notice.
7. Derived mathematically from one or more of the following directly measured
parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
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
RO2112A-070102
Page 1 of 2