- 您現在的位置：買賣IC網 > PDF目錄384887 > RO2125A (RF Monolithics, Inc.) 304.3 MHz SAW Resonator PDF資料下載
參數資料
| 型號： | RO2125A |
| 廠商： | RF Monolithics, Inc. |
| 英文描述： | 304.3 MHz SAW Resonator |
| 中文描述： | 304.3兆赫聲表面波諧振器 |
| 文件頁數： | 1/2頁 |
| 文件大小： | 106K |
| 代理商： | RO2125A |
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
RO2125A-062001
Page 1 of 2
Electrical Characteristics
Characteristic
Nominal Frequency
Tolerance from 304.300 MHz
Sym
f
C
f
C
IL
Q
U
Q
L
T
O
f
O
FTC
|fA|
Notes
Minimum
304.225
Typical
Maximum
304.375
±75
1.5
Units
MHz
kHz
Frequency (+25 °C)
2, 3, 4, 5
Insertion Loss
Quality Factor
2, 5, 6
0.9
dB
Unloaded Q
50
Loaded Q
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Absolute Value during the First Year
5, 6, 7
16,000
1,500
25
f
C
0.032
10
Temperature Stability
6, 7, 8
10
40
°C
kHz
ppm/°C
2
ppm/yr
M
μH
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
84.9591
3.21978
3.3
83
121
fF
pF
5, 6, 7, 9
2, 7
3.0
3.6
Test Fixture Shunt Induc-
Lid Symbolization
nH
Ideal for 315 MHz Superhet Receivers
Very Low Series Resistance
Quartz Stability
Surface-Mount, Ceramic Case with 21 mm
2
Footprint
Complies with Directive 2002/95/EC (RoHS)
The RO2125A 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
approximately 304.3 MHz. This SAW is designed for 315 MHz superhet receivers with 10.7 MHz IF. Applica-
tions include automotive keyless-entry receivers operating in the USA under FCC Part 15, in Canada under
DOC RSS-210, and in Italy.
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
Soldering Temperature (10 seconds / 5 cycles max.)
304.3 MHz
SAW
Resonator
RO2125A
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
相關PDF資料 |
PDF描述 |
|---|---|
| RO2131D | 314.350 MHz SAW Resonator |
| RO2134A | 372.5 MHz SAW Resonator |
| RO2135A | 319.508 MHz SAW Resonator |
| RO2136A | 432.920 MHz SAW Resonator |
| RO2138A | 407.300 MHz SAW Resonator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| RO2125A-5 | 制造商:RFM 制造商全稱:RF Monolithics, Inc 功能描述:304.3 MHz SAW Resonator |
| RO2131D | 制造商:RF Monolithics (RFM) 功能描述:314.35 MHZ RESONATOR - SINGLE PORT - Tape and Reel |
| RO2134A | 制造商:RFM 制造商全稱:RF Monolithics, Inc 功能描述:372.5 MHz SAW Resonator |
| RO2135A | 制造商:RFM 制造商全稱:RF Monolithics, Inc 功能描述:319.508 MHz SAW Resonator |
| RO2136A | 制造商:RFM 制造商全稱:RF Monolithics, Inc 功能描述:432.920 MHz SAW Resonator |
發布緊急采購，3分鐘左右您將得到回復。