www.RFM.com E-mail: info@rfm.com Page 1 of 2
©2008 by RF Monolithics, Inc. RF1301 - 3/28/08
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Nominal Frequency fC2, 4, 5, 6 499.250 MHz
Insertion Loss IL 3, 4, 7 4.0 dB
4 dB Passband BW32, 3, 4, 7 ±30 kHz
3 dB Reject Band BW32, 3, 4, 7 kHz
Rejection at fC ±1.50 MHz
4
10
dB
at fC ±6.0 MHz 25
at fC ±50 MHz
Temperature Operating Case Temperature TC
3, 7, 8
-40 +85 °C
Turnover Temperature TO15 25 40 °C
Turnover Frequency fOfCMHz
Frequency Temperature Coefficient FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year IfAI 3 10 ppm/yr
External Impedance Series Inductance L 1, 7 22 nH
Shunt Capacitance C 5-18 pF
Lid Symbolization (in addition to Lot and/or Date Codes) RFM RF1301
TO39-3 Case
• Ideal Front-End Filter for European Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Rugged TO39 Hermetic Package
• Complies with Directive 2002/95/EC (RoHS)
The RF1301 is a low-loss, compact and economical surface-acoustic-wave (SAW) filter designed to provide
front-end selectivity in 499.250 MHz receivers. Typical applications of these FSK receivers are wireless
remote-control and security devices operating in Europe.
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.
Absolute Maximum Ratings
Rating Value Units
Incident RF Power +13 dBm
DC Voltage Between Any Tw o Pins (Observ e ESD Prec autions) ±30 VDC
Case Temperature -40 to +85 °C
499.250 MHz
SAW Filter
RF1301
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Typical test circuit is shown for TO-3 9 RF filters.
2. Passband and reject bands are specified in reference to fC.
3. All characteristic s are specified ov er the operating temperature range and typical aging for 10 years .
4. Unless noted otherwise, all measurements are mad e wi th the filter ins talled in the specified test fixture. Note that insertion loss, bandwid th, and passband
shape are dependen t on the impedance matching component values and quality. Demonstration circuits are available for confirmation of device performance.
5. One or mor e of the following U.S. Patents apply: 4,454,488; 4,616,197 ; and other pending.
6. All equi pment designs utilizing this produ ct must be approved by the approp riate government agency prior to manufacture or sale.
7. The desi gn, manufa ct uring process, and specif ications of this device are subject to change without notice.
8. The turnover tempe r ature, TO, is the temperature of maximum (or turnover) frequency, fo. The nominal frequency at any case temperature, TC, outs ide the
operating tempera ture range may be calculated from: f = f o[1 - FTC (TO-T
C)2].
Pb
www.RFM.com E-mail: info@rfm.com Page 2 of 2
©2008 by RF Monolithics, Inc. RF1301 - 3/28/08
Typical Filter Response
Typical filter responses are shown below. Illustrated frequencies and
minimum rejection for LO and IMAGE are shown only for superhet
receivers with 10.7 MHz IF.
Electrical Connections
Typical Test Circuit
Case Design
LO
0
-10
-20
-30
-40
-50
-60
-70
-80 5 MHz/div
Frequency
Image
Amplitude Response
Bottom View
Pin 1 Pin 2
Pin 3
Pin Connection
1 Input or Output
2 Output or Input
3 Case Ground
L
CC
L
2
3
1
From 50
Network
Analyzer
Ω
To 50
Ω
Network
Analyzer
Dimensions Millimeters Inches
Min Max Min Max
A 9.40 0.370
B 3.18 0.125
C 2.50 3.50 0.098 0.138
D 0.46 Nominal 0.018 Nominal
E 5.08 Nominal 0.200 Nominal
F 2.54 Nominal 0.100 Nominal
G 2.54 Nominal 0.100 Nominal
H 1.02 0.040
J 1.40 0.055
0
dB
-1
-2
-3
-4
-5
-6
-7
-8 150 KHz/div
Amplitude Response
Min 3dB
Passband
at 25 C
o
B
45°
J
(2 places)
D
(3 places)
H
G
EF
C
A