RF1211B RF Monolithics, RF1211B Datasheet

RF1211B

Manufacturer Part Number

RF1211B

Description

Frequency = 315.0 ;; Description = RF Filter

Manufacturer

RF Monolithics

Datasheet

1.RF1211B.pdf (2 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

RF1211B

Manufacturer:

NXP

Quantity:

5 584

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Electrical Characteristics

Notes:

RF Monolithics, Inc.

RFM Europe

•

The RF1211B is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to pro-

vide 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 wire-

less 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 ad-

vanced SAW design and fabrication technology is utilized to achieve high performance and very low loss with

simple external impedance matching (not included). Our new patent pending solder seal process utilizes a

Faraday shield lid, which improves out of band rejection.

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

2. The frequency f

3. Unless noted otherwise, specifications apply over the entire specified operating temperature range.

4. The turnover temperature, T

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

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.

Nominal Frequency

Insertion Loss

3 dB Bandwidth

Rejection

Temperature

Frequency Aging

External Impedance

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

VSWR

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

be calculated from: f = f

above +65°C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years.

Ideal Front-End Filter for Domestic Wireless Receivers

Low-Loss, Coupled-Resonator Quartz Design

Simple External Impedance Matching

Surface-Mount Ceramic Case with 52 mm

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

Phone: (972) 233-2903

Phone: 44 1963 251383

is defined as the midpoint between the 3dB frequencies.

Characteristic

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

- 21.4 MHz (Image)

- 10.7 MHz (LO)

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

Tolerance from 315.0 MHz

- T

)

Fax: (972) 387-8148

Fax: 44 1963 251510

Footprint

Sym

FTC

|fA|

Notes

1, 2

3, 4

. The nominal frequency at any case temperature, T

Minimum

500

-40

RFM RF1211B

86 nH (Pin 1), 82 nH (Pin 2)

Typical

315.00

E-mail: info@rfm.com

http://www.rfm.com

RF1211B-030102

0.032

700

1.7

. Note that insertion loss, bandwidth,

SAW Filter

315.0 MHz

RF1211B

SM8558-8 Case

Maximum

±80

800

+85

3.0

test system with

ppm/°C

Page 1 of 2

ppm/yr

Units

MHz

kHz

°C

, may

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