RF1439E
•
•
•
•
Ideal Front-End Filter for Wireless Receivers
Low-Loss, Coupled-Resonator Quartz Design
Simple Impedance Matching
Complies with Directive 2002/95/EC (RoHS)
Pb
315.00 MHz
SAW Filter
The RF1439E is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 315.0 MHz receivers. Receivers using this filter include superheterodynes with IF’s at
10.7 MHz or 500 kHz, plus direct conversion and superregeneratives. Typical applications of these receivers
are wireless remote-control and security devices operating in North America. This coupled-resonator filter
(CRF) uses selective null placement to provide typically more than 40 dB suppression of LO and image
responses in superheterodyne receivers with 10.7 MHz IF’s. RFM’s advanced SAW design and fabrication
technology is utilized to achieve high performance and very low loss with simple external impedance
matching.
SM3030-6 Case
3.0 x 3.0
Electrical Characteristics
Characteristic
Center Frequency @ 25°C
Insertion Loss
3 dB Bandwidth
Passband Ripple (Relative to IL
min
) fc ±200 kHz
Rejection
10 - 297 MHz
297 - 307 MHz
307 - 312 MHz
312 - 314 MHz
316.5 - 325 MHz
325 - 329.5 MHz
329.5 - 339.4 MHz
339.4 - 1000 MHz
Frequency Temperature Coefficient
Frequency Aging
Impedance @ f
C
Absolute Value during the First Year
Input Z
IN
= R
In
|| C
IN
Output Z
OUT
= R
OUT
|| C
OUT
FTC
|fA|
Z
IN
Z
OUT
3, 4
5
1
Sym
f
C
IL
BW
3
BW
3
Notes
1, 2, 3
1
1, 3
1, 3
Minimum
314.900
850
48
40
30
13
14
35
43
47
Typical
315.00
2.0
900
0.4
51
44
34
16
17
38
46
50
0.032
<±10
TBD
TBD
Maximum
315.100
2.5
950
1.2
Units
MHz
dB
kHz
dB
1, 3, 10, 11
dB
ppm/°C
2
ppm/yr
Lid Symbolization (in addition to Lot and/or Date Codes)
Standard Reel Quantity
7 Inch Reel
Standard Reel Quantity
13 Inch Reel
9
793 // YWWS
500 Pieces/Reel
3000 Pieces/Reel
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50
Ω
test system with
VSWR
≤
1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f
c
. Note that insertion loss and band-
width are dependent on the impedance matching component values and quality.
The frequency f
c
is defined as the midpoint between the 3dB frequencies.
Where noted, specifications apply over the entire specified operating temperature range of -40 to 90°C.
The turnover temperature, T
O
, is the temperature of maximum (or turnover) frequency, f
o
. The nominal frequency at any case temperature, T
c
, may
2.
3.
4.
be calculated from: f = f
o
[1 - FTC (T
o
- T
c
)
2
].
5. 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.
6. The design, manufacturing process, and specifications of this device are subject to change without notice.
7. One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending.
8. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale.
9. Tape and Reel Standard for ANSI / EIA 481.
10. These values are attainable by using the optional pin out.
11. Typical rejection is defined as the typical rejection at the worst frequency in the band.
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
Page 1 of 5
RF1439E - 1/13/09
RF1439E Filter Plot with High-Side Attenuation Markers
18 Nov 2008 11:34:24
CH1
S 21
LO G
10 dB/
RE F 0 dB
1 : 0 . 0000
dB
0 . 000
000
MHz
RF 1439E.R1
Unit #28 Demo
1
CH1
Mark ers
REF=1
2 : - 17 . 252
dB
2 . 80000
MHz
Cor
3 : - 40 . 778
dB
11 . 6100
MH z
2
4 : - 53 . 501
dB
16 . 8000
MH z
5 : - 56
. 920
dB
MH z
27 . 4900
3
Resp
4
5
CE NT ER
315 . 000
000
MHz
S PAN
100 . 000
000
MHz
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
Page 2 of 5
RF1439E - 1/13/09
RF1439E Filter Plot with Low-Side Attenuation Markers
18 Nov 2008 11:31:18
CH1
S 21
LO G
10 dB/
RE F 0 dB
1 : 0 . 0000
dB
0 . 000
000
MHz
RF 1439E.R1
Unit #28 Demo
1
Mark ers
REF=1
2 : - 56 . 652
dB
- 20 . 4299
MH z
CH1
Cor
3 : - 48 . 042
dB
- 10 . 0500
MH z
5
4 : - 32 . 184
dB
-4 . 56999
MHz
5 : - 16
. 457
dB
MHz
-1 . 37000
4
3
Resp
2
CE NT ER
315 . 000
000
MHz
S PAN
100 . 000
000
MHz
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
Page 3 of 5
RF1439E - 1/13/09
RF1439E Filter Pass-band Impedance and Amplitude Plots
18 N ov 2008 11:15:13
CH1
S 11
1 U FS
-4 . 1895
1 : 48 . 912
315 . 000
000
MHz
RF1439E.R1
Unit #28 Demo
120
. 60
pF
CH3
S22
1 : 44 . 607
315 . 000
1 U FS
- 2 . 5059
MHz
201 . 63
pF
000
1
1
Cor
Full
Cor
CENTR
CH2
315 . 000
S 21
MHz
SP AN
1 dB /
2 . 000
MHz
CEN TR
315 . 000
1 : 0 . 0000
MHz
dB
SPA N
0 . 000
2 . 000
000
MHz
MHz
LOG
REF 0 dB
1
C H2
Cor
Full
2
cent
BW :
:
Mark ers
REF =1
MHz
MHz
. 849360
315 . 005284
Q : 370 . 87
1_ loss
3
4
: - 1 . 7264
dB
CE NTER
315 . 000
000
MHz
S PA N
2. 000
000
MHz
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
Page 4 of 5
RF1439E - 1/13/09
Absolute Maximum Ratings
Rating
Input Power Level
DC Voltage
Storage Temperature
Operable Temperature Range
Soldering Temperature
10 seconds / 5 cycles maximum
Value
10
12
-40 to +125
-40 to +125
260
Units
dBm
VDC
°C
°C
°C
Electrical Connections
1
B
6
C
6
G
H
1
Pin
1
2
3
4
5
6
Connection
Input
Input Ground
Ground
Output
Output Ground
Ground
3
4
D
4
J
3
A 2
5
E
F
5
2
I
Matching Circuit to 50Ω
82nH
6 1
3.9pF
5
Output
Case Dimensions
mm
Nom
3.0
3.0
1.25
0.90
2.80
1.6
0.85
1.5
0.60
1.30
Inches
Nom
0.118
0.118
0.049
0.035
0.110
0.063
0.033
0.059
0.024
0.051
Input
Dimension
A
B
C
D
E
F
G
H
I
J
2
82nH
4
3
3.9pF
Min
2.87
2.87
1.12
0.77
2.67
1.47
0.72
1.37
0.47
1.17
Max
3.13
3.13
1.38
1.03
2.93
1.73
0.98
1.63
0.73
1.43
Min
0.113
0.113
0.044
0.030
0.105
0.058
0.028
0.054
0.019
0.046
Max
0.123
0.123
0.054
0.040
0.115
0.068
0.038
0.064
0.029
0.056
www.RFM.com E-mail: info@rfm.com
©2009 by RF Monolithics, Inc.
Page 5 of 5
RF1439E - 1/13/09
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