參數(shù)資料
型號: RP1239
廠商: RF MONOLITHICS INC
元件分類: SAW諧振器
英文描述: 2-PORT SAW RESONATOR, 315 MHz
封裝: RUGGED, HERMETIC, LOW-PROFILE, TO-39, 3 PIN
文件頁數(shù): 1/2頁
文件大小: 149K
代理商: RP1239
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
E-mail: info@rfm.com
Page 1 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RP1239-110499
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency
Absolute Frequency
fC
2, 3, 4, 5,
314.925
315.075
MHz
Tolerance from 315.000 MHz
f
C
±75
kHz
Insertion Loss
IL
2, 5, 6
5.3
8.5
dB
Quality Factor
Unloaded Q
QU
5, 6, 7
18,000
50
Loaded Q
QL
8,100
Temperature Stability
Turnover Temperature
TO
6, 7, 8
37
52
67
°C
Turnover Frequency
fO
fC+8.5
kHz
Frequency Temp. Coefficient
FTC
0.037
ppm/°C2
Frequency Aging
Absolute Value during First Year
|fA|
6
≤ 10
ppm/yr
DC Insulation Resistance between Any Two Pins
5
1.0
M
RF Equivalent RLC
Motional Resistance
RM
5, 7, 9
84
167
Motional Inductance
LM
758.027
H
Motional Capacitance
CM
0.336771
fF
Shunt Static Capacitance
CO
5, 6, 9
1.9
2.2
2.5
pF
Lid Symbolization (in addition to Lot and/or Date Codes)
RFM P1239
TO39-3 Case
Designed for 315 MHz Transmitters
Nominal Insertion Phase Shift of 180° at Resonance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
Complies with Directive 2002/95/EC (RoHS)
The RP1239 is a two-port, 180° surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-
vides reliable, fundamental-mode, quartz frequency stabilization of low-power AM and FSK transmitters
operating at 315.0 MHz for use in the United Kingdom under DTI MPT 1340 and in the USA under FCC Part
15. Applications include remote-control and wireless security devices. This is a pin-for-pin replacement in
preexisting transmitter circuits utilizing two-port, 180° SAW resonators.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation (See: Typical Test Circuit)
+0
dBm
DC Voltage Between Any Two Pins (Observe ESD Precautions)
±30
VDC
Case Temperature
-40 to +85
°C
315.0 MHz
SAW
Resonator
RP1239
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 significantly in subsequent years.
2.
The frequency fC is the frequency of minimum IL with the resonator in the specified test fixture in a 50 test system with VSWR ≤ 1.2:1. Typically,
fOSCILLATOR or fTRANSMITTER is less than the resonator fC.
3.
One or more of the following United States patents apply: 4,454,488; 4,616,197.
4.
Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufac-
turer.
5.
Unless noted otherwise, case temperature TC = +25°C± 5°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) frequency, fO. The nominal frequency at any case temperature, TC, may be
calculated from: f = fO [1 - FTC (TO - TC)
2]. Typically, oscillator T
O is 20° less than the specified resonator TO.
9.
This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance
CO is the measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case parasitic
capacitance.
Pb
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