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RF1181 Datasheet Preview

RF1181 Datasheet

916.50 MHz SAW Filter

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®
• Ideal Front-End Filter for 916.5 MHz Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Rugged TO39 Hermetic Package
• Complies with Directive 2002/95/EC (RoHS) Pb
The RF1181 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 916.5 MHz receivers. Receiver designs using this filter include superhet with
10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of these receivers are wire-
less remote-control and security devices operating in the USA under FCC Part 15 and in Canada under DoC
RSS-210.
This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater
than 40 dB, of the LO and image spurious responses of superhet receivers with 10.7 MHz IF. RFM’s ad-
vanced SAW design and fabrication technology is utilized to achieve high performance and very low loss with
simple external impedance matching (not included). Quartz construction provides excellent frequency stabil-
ity over a wide temperature range.
RF1181
916.50 MHz
SAW Filter
TO39-3 Case
Electrical Characteristics
Characteristic
Center Frequency at 25°C Absolute Frequency
Insertion Loss
3 dB Bandwidth
Tolerance from 916.500 MHz
Rejection
Temperature
at fC - 21.4 MHz (Image)
at fC - 10.7 MHz (LO)
Ultimate
Operating Case Temp.
Turnover Temperature
Turnover Frequency
Freq. Temp. Coefficient
Frequency Aging
Absolute Value during the First Year
External Impedance
Series Inductance
Shunt Capacitance
Lid Symbolization (in addition to Lot and/or Date Codes)
Sym
fC
fC
IL
BW3
TC
TO
fO
FTC
|fA|
L
C
Notes
1, 2
1
1,2
1
3, 4
5
1
1
Minimum
Typical
Maximum
916.400
916.500
916.600
±100
45
600 750 1000
33 40
15 37
80
-40 +85
25
fC
0.032
10
Coilcraft 8.2 nH Chip Inductor
15
RFM RF1181
Units
MHz
kHz
dB
kHz
dB
°C
°C
MHz
ppm/°C2
ppm/yr
nH
pF
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 test system with
VSWR 1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, fc. Note that insertion loss, bandwidth,
and passband shape are dependent on the impedance matching component values and quality.
2. The frequency fc is defined as the midpoint between the 3dB frequencies.
3. Unless noted otherwise, specifications apply over the entire specified operating temperature range.
4. The 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].
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.
RF Monolithics, Inc. Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
RF1181-070102
Page 1 of 2




RF Monolithics

RF1181 Datasheet Preview

RF1181 Datasheet

916.50 MHz SAW Filter

No Preview Available !

916.5 MHz
www.DataSheet4U.com
Absolute Maximum Ratings
SAW Filter
Rating
Incident RF Power
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature5
Typical Filter Response
Typical filter responses are shown below. The actual response is depen-
dent on external impedance matching and circuit layout. Illustrated fre-
quencies and minimum rejection for LO and IMAGE are shown only for
superhet receivers with 10.7 MHz IF.
0
-10
-20
-30
-40
-50
-60
-70
-80
5 MHz/div
Frequency
Value
+13
±30
-40 to +85
0
-1
-2
-3
-4
-5
-6
-7
-8
Units
dBm
VDC
°C
Min 3dB
Passband
at 25°C
200 kHz/div
Frequency
Electrical Connections
Pin Connection
1 Input or Output
2 Output or Input
3 Case Ground
Bottom View
Pin 1
Pin 2
Pin 3
Typical Test Circuit
From 50
Network
Analyzer
L
1
C
L
2
3C
To 50
Network
Analyzer
Case Design
C
B
G
F
AE
D
(3 places)
J
(2 places)
H
45°
Dimensions
A
B
C
D
E
F
G
H
J
Millimeters
Min Max
9.40
3.18
2.50 3.50
0.46 Nominal
5.08 Nominal
2.54 Nominal
2.54 Nominal
1.02
1.40
Inches
Min Max
0.370
0.125
0.098
0.138
0.018 Nominal
0.200 Nominal
0.100 Nominal
0.100 Nominal
0.040
0.055
RF Monolithics, Inc. Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
RF1181-070102
Page 2 of 2


Part Number RF1181
Description 916.50 MHz SAW Filter
Maker RF Monolithics
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