RO3135A
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Designed for 319.508 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Surface-mount Ceramic Case
Complies with Directive 2002/95/EC (RoHS)
319.508 MHz
SAW
Resonator
Pb
The RO3135A is a one-port surface-acoustic-wave (SAW) resonator packaged in a surface-mount
ceramic case. It provides reliable, fundamental-mode quartz frequency stabilization of fixed-frequency
transmitters operating at 319.508 MHz.
Absolute Maximum Ratings
Rating
Value
+0
Units
dBm
VDC
°C
CW RF Power Dissipation (See: Typical Test Circuit)
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
±30
-40 to +85
260
Soldering Temperature (10 seconds / 5 cycles maximum)
°C
SM5035-4
Electrical Characteristics
Characteristic
Center Frequency, +25 °C
Tolerance from 319.508 MHz
Insertion Loss
Sym
Notes
2,3,4,5
2,5,6
Minimum
Typical
Maximum
Units
MHz
kHz
dB
f
319.508
C
∆f
±75
2.2
C
IL
1.5
19200
1500
25
Q
Quality Factor
Unloaded Q
U
5,6,7
Q
T
50 Ω Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
10
40
°C
O
f
f
6,7,8
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
0.032
ppm/°C
|f |
Frequency Aging
1
5
≤10
ppm/yr
MΩ
Ω
A
DC Insulation Resistance between Any Two Terminals
1.0
R
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
8.4
81
M
L
5, 7, 9
µH
M
C
3.06
3.5
70
fF
M
C
5, 6, 9
2, 7
pF
O
L
Test Fixture Shunt Inductance
nH
TEST
Lid Symbolization (in addition to Lot and/or Date Codes)
839 // YWWS
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Frequency aging is the change in fC with time and is specified at +65 °C or less.
8.
Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-
lated from: f = fO [1 - FTC (TO -TC)2]. Typically oscillator TO is approximately
equal to the specified resonator TO.
This equivalent RLC model approximates resonator performance near the reso-
nant frequency and is provided for reference only. The capacitance CO is the
static (nonmotional) capacitance between the two terminals measured at low fre-
quency (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 - 0.05 pF.
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, fC, is measured at the minimum insertion loss point, ILMIN
,
9.
with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt induc-
tance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLA-
TOR or fTRANSMITTER is approximately equal to the resonator fC.
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 TC = +25 ± 2 °C.
The design, manufacturing process, and specifications of this device are subject
to change without notice.
3.
4.
10. Tape and Reel standard per ANSI / EIA 481.
5.
6.
7.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
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© 2011 by RF Monolithics, Inc.
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RO3135A(R) - 8/29/11