RF1283 RF Monolithics, RF1283 Datasheet

RF1283

Manufacturer Part Number

RF1283

Description

Frequency = 433.92 ;; Description = RF Filter

Manufacturer

RF Monolithics

Datasheet

1.RF1283.pdf (2 pages)

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Electrical Characteristics

Notes:

RF Monolithics, Inc.

RFM Europe

•

The RF1283 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide

front-end selectivity in 433.92 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 operating in Europe under ETSI I-ETS 300 220.

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). Quartz construction provides execellent frequency sta-

blility over a wide temperature range.

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.

Center Frequency at 25°C

Insertion Loss

3 dB Bandwidth

Rejection

Temperature

Frequency Aging

External Impedance

Lid Symbolizaation (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 European Wireless Receivers

Low-Loss, Coupled-Resonator Quartz Design

Simple External Impedance Matching

Rugged TO39 Hermetic Package

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

[1 - FTC (T

Absolute Frequency

Tolerance from 433.92 MHz

at f

Ultimate

Operating Case Temp.

Turnover Temperature

Turnover Frequency

Freq. Temp. Coefficient

Absolute Value during the First Year

Series Inductance

Shunt Capacitance

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

- 21.4 MHz (Image)

- 10.7 MHz (LO)

- T

)

Fax: (972) 387-8148

Fax: 44 1963 251510

Sym

FTC

|fA|

Notes

1, 2

3, 4

. The nominal frequency at any case temperature, T

Minimum

433.840

400

-35

RFM RF1283

E-mail: info@rfm.com

http://www.rfm.com

RF1283-082801

Typical

0.032

. Note that insertion loss, bandwidth,

500

6.8

8.2

433.92 MHz

SAW Filter

RF1283

TO39-3 Case

Maximum

434.00

700

+85

5.0

±80

test system with

ppm/°C

Page 1 of 2

ppm/yr

Units

MHz

kHz

°C

, may

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