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参数资料
| 型号： | RO2135A |
| 厂商： | RF MONOLITHICS INC |
| 元件分类： | SAW谐振器 |
| 英文描述： | 1-PORT SAW RESONATOR, 319.508 MHz |
| 封装： | ROHS COMPLIANT, CERAMIC, CASE SM-2, 4 PIN |
| 文件页数： | 1/2页 |
| 文件大小： | 113K |
| 代理商： | RO2135A |
www.RFM.com
E-mail: info@rfm.com
Page 1 of 2
2008 by RF Monolithics, Inc.
RO2135A - 3/25/08
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency at +25 °C
Absolute Frequency
fC
2, 3, 4, 5
319.508
MHz
Tolerance from 319.508 MHz
ΔfC
±75
kHz
Insertion Loss
IL
2, 5, 6
1.1
2.2
dB
Quality Factor
Unloaded Q
QU
5, 6, 7
19,200
50
Ω Loaded Q
QL
1,500
Temperature Stability
Turnover Temperature
TO
6, 7, 8
10
25
40
°C
Turnover Frequency
fO
fC
Frequency Temperature Coefficient
FTC
0.032
ppm/°C2
Frequency Aging
Absolute Value during the First Year
|fA|
1
≤10
ppm/yr
DC Insulation Resistance between Any Two Terminals
5
1.0
M
Ω
RF Equivalent RLC Model
Motional Resistance
RM
5, 7, 9
8.768
8.4
9.27
Ω
Motional Inductance
LM
80.9629
H
Motional Capacitance
CM
3.06
fF
Transducer Static Capacitance
CO
5, 6, 9
3.4
3.5
3.56
pF
Test Fixture Shunt Inductance
LTEST
2, 7
69.85
nH
Lid Symbolization (in Addition to to Lot and/or Date Code)
176
Ideal for 319 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Surface-Mount, Ceramic Case with 21 mm2 Footprint
Complies with Directive 2002/95/EC (RoHS)
The RO2135A is a one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case. It
provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating
at 319 MHz. Applications include remote-control and wireless security receivers operating in the USA under
FCC Part 15 and in Canada under DoC RSS-210.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation
+10
dBm
DC Voltage Between Terminals (Observe ESD Precautions)
±30
VDC
Case Temperature1
-40 to +85
°C
Soldering Temperature
+250
°C
319.508 MHz
SAW
Resonator
RO2135A
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Lifetime (10 year) frequency aging.
2.
The center frequency, fC, is measured at the minimum insertion loss point,
ILMIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, LTEST, is tuned for parallel resonance with CO at fC.
3.
One or more of the following United States patents apply: 4,454,488 and
4,616,197.
4.
Typically, equipment utilizing this device requires 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)
frequency, fO. The nominal frequency at any case temperature, TC, may be
calculated from: f = fO [1 - FTC (TO -TC)
2].
9.
This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance CO
is the static (nonmotional) capacitance between the two terminals
measured at low frequency (10 MHz) with a capacitance meter. The
measurement includes parasitic capacitance with”NC” pads unconnected.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can by calculated as: CP ≈ CO -0.05pF.
SM-2 Case
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