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RF Monolithics - Ideal for 315MHz Automotive-Keyless-Entry Transmitters

Numéro de référence RO2073D
Description Ideal for 315MHz Automotive-Keyless-Entry Transmitters
Fabricant RF Monolithics 
Logo RF Monolithics 





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RO2073D fiche technique
® RO2073D
• Ideal for 315 MHz Automotive-Keyless-Entry Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS) Pb
The RO2073D 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 315 MHz. This SAW was designed for AM transmitters in automotive-keyless-entry applications
operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy.
315.0 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
Input Power Level
DC Voltage
Storage Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Electrical Characteristics
Value
0
12
-40 to +85
260
Units
dBm
VDC
°C
°C
SM3838-6 Case
3.8 X 3.8
Characteristic
Frequency (+25 °C)
Absolute Frequency
Tolerance from 315.0 MHz
Insertion Loss
Quality Factor
Unloaded Q
50W 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
Shunt Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
Sym
fC
fC
IL
QU
QL
TO
fO
FTC
|fA|
RM
LM
CM
CO
LTEST
Notes
2, 3, 4, 5
2, 5, 6
6, 7, 8
1, 6
5
5, 7, 9
5, 6, 9
2, 7
Minimum
314.900
Typical
1.6
6500
1100
10 25
fC
0.032
10
1.0
20.67
67.0
4.00
3.5 3.65
64.6
442 // YWWS
500 Pieces / Reel
3000 Pieces / Reel
Maximum
315.100
±100
2.5
40
29
4.5
Units
MHz
kHz
dB
°C
ppm/°C2
ppm/yr
M
µH
fF
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. 7. Derived mathematically from one or more of the following directly measured
Aging may exceed the specification for prolonged temperatures above +65°C.
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
Typically, aging is greatest the first year after manufacture, decreasing in subse- 8. Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
quent years.
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-
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
inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOS-
lated from: f = fO [1 - FTC (TO -TC)2]. Typically oscillator TO is approximately
equal to the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the reso-
CILLATOR or fTRANSMITTER is approximately equal to the resonator fC.
3. One or more of the following United States patents apply: 4,454,488 and
nant frequency and is provided for reference only. The capacitance CO is the
static (nonmotional) capacitance between the two terminals measured at low
4,616,197.
frequency (10 MHz) with a capacitance meter. The measurement includes para-
4. Typically, equipment utilizing this device requires emissions testing and govern-
sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is
ment approval, which is the responsibility of the equipment manufacturer.
approximately 0.05 pF. Transducer parallel capacitance can by calculated as:
5. Unless noted otherwise, case temperature TC = +25°C±2°C.
6. The design, manufacturing process, and specifications of this device are subject
CP CO - 0.05 pF.
to change without notice.
RF Monolithics, Inc. Phone: (972) 233-2903
Fax: (972) 387-8148
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.
http://www.rfm.com
RO2073D-040103
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