RF1211C RFM, RF1211C Datasheet

Filters 315.00MHz Narrowband Receiver Front End

RF1211C

Manufacturer Part Number

RF1211C

Description

Filters 315.00MHz Narrowband Receiver Front End

Manufacturer

RFM

Datasheet

1.RF1211C.pdf (3 pages)

Specifications of RF1211C

Product

RF SAW Filters

Frequency

315 MHz

Impedance

344 Ohms

Operating Temperature Range

- 40 C to + 85 C

Voltage Rating

12 V

Termination Style

SMD/SMT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

RF1211C

Manufacturer:

RFMD

Quantity:

5 000

Company:

Allchip Electronic(HK) Limited

Part Number:

RF1211C

Manufacturer:

RFM

Quantity:

7 766

Current page: 1 of 3
Download datasheet (80Kb)

• Ideal Front-End Filter for Domestic Wireless Receivers

• Low-Loss, Coupled-Resonator Quartz Design

• Simple External Impedance Matching

• Complies with Directive 2002/95/EC (RoHS)

The RF1211C is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter

designed to provide front-end selectivity in 315.0 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 (especially for

automotive keyless entry) operating in the USA under FCC Part 15, in Canada under RSS-210,

and in Italy

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.

Electrical Characteristics

www.RFM.com

Item

Center Frequency @ 25°C

Minimum I.L. (314.82~315.22 MHz)

Pass band (relative to IL

314.77~315.2 MHz

314.71~315.26 MHz

Pass bandwidth (relative to IL

Attenuation: (relative to IL

10~270

270~309

309~313.94

316~335

335~400

400~1000

Impedance at F

Turnover To

Frequency Aging

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

Standard Reel Quantity

Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50

VSWR

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

The frequency f

Where noted 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.

Notes:

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

MHz

; Input

Output

is defined as the midpoint between the 3dB frequencies.

min

Absolute Value During the First Year

min

)

[1 - FTC (T

min

OUT

)

, is the temperature of maximum (or turnover) frequency, f

(MHz)

(dB)

//C

OUT

(dB)

//C

- T

(deg.C)

(KHz)

OUT

)

min

Reel Size 13 Inch

Reel Size 7 Inch

Minimum

800

. The nominal frequency at any case temperature, T

344

Typical

25 typ.

315

900

1.8

1.5

2.0

3000 Pieces/Reel

10 ppm/yr Typical

// 4.9 pF

500 Pieces/Reel

410 YWWS

. Note that insertion loss and band-

SAW Filter

315.0 MHz

RF1211C

SM5050-8 Case

Maximum

5.0

3.0

6.0

5 x 5

test system with

RF1211C - 3/21/08

Note

Page 1 of 3

1, 2

3, 4

, may

Related parts for RF1211C

RF1211C Summary of contents

Page 1

... Simple External Impedance Matching • Complies with Directive 2002/95/EC (RoHS) The RF1211C is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 315.0 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical ...

Page 2

... STOP 316.000 000 MHz 10 Dec 2002 10:26:15 log MAG 10 dB/ REF cent: 314.971399 MHz SPAN 50.000 000 MHz 1_ 0.000 000 MHz Max REF=1 BW: .952 466 MHz Q: 330.69 1_ loss: -2.1279 0.000 000 MHz Max REF=1 BW: .950 662 MHz Q: 331.32 1_ loss: -2.1413 dB Page RF1211C - 3/21/08 ...

Page 3

... Input C 12pf Value Units 10 dBm 12 VDC -40 to +85 °C 260 ° Inches Min Nom Max Min Nom 4.8 5.0 5.2 0.1968 4.8 5.0 5.2 0.1968 1.7 2.08 0.0818 1.17 0.046 0.64 0.0252 2.39 2.54 2.69 0.100 Max 0.0669 Page RF1211C - 3/21/08 ...

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