RF3181 RFM, RF3181 Datasheet

Filters 916.50MHz Narrowband Receiver Front End

RF3181

Manufacturer Part Number
RF3181
Description
Filters 916.50MHz Narrowband Receiver Front End
Manufacturer
RFM
Datasheet

Specifications of RF3181

Product
RF SAW Filters
Frequency
916.5 MHz
Frequency Range
916.4 MHz to 916.6 MHz
Operating Temperature Range
- 40 C to + 85 C
Voltage Rating
30 V
Termination Style
Radial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
RF3181
Manufacturer:
RFMD
Quantity:
5 000
Part Number:
RF3181D
Manufacturer:
RFMD
Quantity:
5 000
Part Number:
RF3181E
Manufacturer:
RFMD
Quantity:
5 000
www.RFM.com
©2008 by RF Monolithics, Inc.
Electrical Characteristics
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
• 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)
The RF3181 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 wireless 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
advanced 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
stability over a wide temperature range.
Characteristic
Center Frequency at 25°C Absolute Frequency
Insertion Loss
3 dB Bandwidth
Rejection
Temperature
Frequency Aging
External Impedance
Lid Symbolization (in addition to Lot and/or Date Codes)
Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50
VSWR
and passband shape are dependent on the impedance matching component values and quality.
The frequency f
Unless noted otherwise, specifications apply over the entire specified operating temperature range.
The turnover temperature, T
be calculated from: f = f
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.
The design, manufacturing process, and specifications of this device are subject to change without notice.
One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending.
All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale.
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f
E-mail: info@rfm.com
c
is defined as the midpoint between the 3dB frequencies.
o
Tolerance from 916.500 MHz
at f
at f
Ultimate
Operating Case Temp.
Turnover Temperature
Turnover Frequency
Freq. Temp. Coefficient
Absolute Value during the First Year
Series Inductance
Shunt Capacitance
[1 - FTC (T
C
C
O
- 21.4 MHz (Image)
- 10.7 MHz (LO)
, is the temperature of maximum (or turnover) frequency, f
o
- T
c
)
2
].
Pb
Sym
BW
FTC
|fA|
T
T
f
IL
f
C
L
O
C
f
C
O
C
3
Notes
1, 2
3, 4
1,2
1
1
5
1
1
o
. The nominal frequency at any case temperature, T
Minimum
916.400
600
-40
33
15
1
Coilcraft 8.2 nH Chip Inductor
RFM RF3181
Typical
916.500
0.032
750
3.2
40
37
80
25
c
f
10
C
. Note that insertion loss, bandwidth,
916.50 MHz
SAW Filter
RF3181
TO39-3 Case
Maximum
916.600
±100
1000
+85
5
5
test system with
RF3181 - 3/21/08
ppm/°C
ppm/yr
Page 1 of 2
Units
MHz
MHz
kHz
kHz
c
dB
dB
nH
pF
°C
°C
, may
2

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RF3181 Summary of contents

Page 1

... Rugged TO39 Hermetic Package • Complies with Directive 2002/95/EC (RoHS) The RF3181 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 wireless remote- control and security devices operating in the USA under FCC Part 15 and in Canada under DoC RSS-210 ...

Page 2

... J (2 places) Millimeters Min Max A 9.40 B 3.18 C 2.50 3.50 D 0.46 Nominal E 5.08 Nominal F 2.54 Nominal G 2.54 Nominal H 1.02 J 1.40 H 45° 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 Page RF3181 - 3/21/08 ...

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