RF3355C【PDF 1/3 页】SAW FILTER 390MHZ SM5050-8

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Preliminary

RF3355C

Ideal Front-End Filter for Wireless Receivers

Low-Loss, Coupled-Resonator Quartz Design

Simple External Impedance Matching

390.0 MHz

? Complies with Directive 2002/95/EC (RoHS) Pb

The RF3355C is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to pro-

SAW Filter

vide front-end selectivity in 390 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.

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.

SM5050-8 Case

5x5

Electrical Characteristics

Characteristic

Center Frequency at 25°C

Absolute Frequency

Tolerance from 390.0 MHz

Sym

f C

? f C

Notes

1, 2

Minimum

Typical

390.0

Maximum

±100

Units

MHz

kHz

Minimum Insertion Loss 389.82 -390.22 MHz

Passband (relative to IL min )

389.77 -390.2

389.71 -390.26

IL min

2.0

1.5

2.0

4.0

3.0

6.0

Passband (relative to IL min )

Attenuation: (relative to IL min )

0 - 345 MHz

BW 3

500

1100

kHz

345 - 370 MHz

370 - 388.94 MHz

391.5 - 410 MHz

Impedance at F C ; Input Z IN =R IN //C IN

Output Z OUT =R OUT //C OUT

410 - 475 MHz

475 - 1000 MHz

344 ? // 4.9pF

Turnover To

3, 4

°C

Frequency Aging

Absolute Value During the First Year

3, 4

≤ 10 ppm/yr Typical

Lid Symbolization (in addition to Lot and/or Date Codes)

736 // YWWS

Standard Reel Quantity

Reel Size 7 Inch

Reel Size 13 Inch

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 ? 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 and passband shape are dependent on the impedance matching component values and quality.

2. The frequency f c is defined as the midpoint between the 3dB frequencies.

3. Where noted specifications apply over the entire specified operating temperature range.

4. 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

be calculated from: f = f o [1 - FTC (T o - T c ) 2 ].

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.

RF Monolithics, Inc.

RFM Europe

Phone: (972) 233-2903

Phone: 44 1963 251383

Fax: (972) 387-8148

Fax: 44 1963 251510

E-mail: info@rfm.com

http://www.rfm.com

Page 1 of 3

?1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.

RF3355C-071907

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