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參數資料
| 型號： | RO2122A |
| 廠商： | RF Monolithics, Inc. |
| 英文描述： | 293.125 MHz SAW Resonator |
| 中文描述： | 293.125兆赫聲表面波諧振器 |
| 文件頁數： | 1/2頁 |
| 文件大小： | 101K |
| 代理商： | RO2122A |
RF Monolithics, Inc.
RFM Europe
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
RO2122A-062001
Page 1 of 2
Soldering Temperature (10 seconds / 5 cycles max.)
Electrical Characteristics
Characteristic
Nominal Frequency
Tolerance from 293.125 MHz
Sym
f
C
f
C
IL
Q
U
Q
L
T
O
f
O
FTC
|f
A
|
Notes
Minimum
293.025
Typical
Maximum
293.225
±100
1.5
Units
MHz
kHz
dB
Frequency (+25 °C)
2, 3, 4, 5
Insertion Loss
Quality Factor
2, 5, 6
0.8
Unloaded Q
50
Loaded Q
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Absolute Value during the First Year
5, 6, 7
17,500
1,600
25
f
C
0.032
10
Temperature Stability
6, 7, 8
10
40
°C
ppm/°C
2
ppm/yr
M
μH
fF
pF
nH
Frequency Aging
DC Insulation Resistance between Any Two Terminals
RF Equivalent RLC Model
1, 6
5
1.0
Motional Resistance
Motional Inductance
Motional Capacitance
Transducer Static Capacitance
R
M
L
M
C
M
C
O
L
TEST
5, 6, 7, 9
10
19
94.3270
3.12428
3.2
90
116
5, 6, 9
2, 7
2.9
3.5
Test Fixture Shunt Inductance
Lid Symbolization
Ideal for 303.825 MHz Superhet Receiver LOs
Very Low Series Resistance
Quartz Stability
Surface-Mount, Ceramic Case with 21 mm
2
Footprint
Complies with Directive 2002/95/EC (RoHS)
The RO2122A 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 293.125 MHz. This SAW is designed for 303.825 MHz superhet receivers with 10.7 MHz IF. Appli-
cations include remote-control and wireless security receivers operating in the USA under FCC Part 15, in
Japan, in Korea, and in Australia.
Absolute Maximum Ratings
Rating
Value
+0
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
CW RF Power Dissipation
DC Voltage Between Terminals
Case Temperature
293.125 MHz
SAW
Resonator
RO2122A
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Frequency aging is the change in f
C
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 in subse-
quent years.
The center frequency, f
C
, is measured at the minimum insertion loss point,
IL
MIN
, with the resonator in the 50
test system (VSWR
≤
1.2:1). The shunt
inductance, L
TEST
, is tuned for parallel resonance with C
O
at f
C
. Typically, f
OS-
CILLATOR
or f
TRANSMITTER
is approximately equal to the resonator f
C
.
One or more of the following United States patents apply: 4,454,488 and
4,616,197.
Typically, equipment utilizing this device requires emissions testing and govern-
ment approval, which is the responsibility of the equipment manufacturer.
Unless noted otherwise, case temperature T
C
= +25°C±2°C.
The design, manufacturing process, and specifications of this device are subject
to change without notice.
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
.
2.
3.
4.
5.
6.
7.
8.
Turnover temperature, T
O
, is the temperature of maximum (or turnover) fre-
quency, f
O
. The nominal frequency at any case temperature, T
C
, may be calcu-
lated 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 reso-
nant frequency and is provided for reference only. The capacitance C
O
is the
static (nonmotional) capacitance between the two terminals measured at low
frequency (10 MHz) with a capacitance meter. The measurement includes para-
sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is
approximately 0.05 pF. Transducer parallel capacitance can by calculated as:
C
P
≈
C
O
- 0.05 pF.
9.
SM-2 Case
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