RF1181 RF Monolithics, RF1181 Datasheet

RF1181

Manufacturer Part Number

RF1181

Description

Frequency = 916.5 ;; Description = RF Filter

Manufacturer

RF Monolithics

Datasheet

1.RF1181.pdf (2 pages)

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Notes:

RF Monolithics, Inc.

RFM Europe

•

The RF1181 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide

front-end selectivity in 916.5 MHz receivers.

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 the USA under FCC Part 15 and in Canada under DoC

RSS-210.

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 excellent frequency stabil-

ity over a wide temperature range.

Electrical Characteristics

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 Absolute 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 916.5 MHz 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

Tolerance from 916.500 MHz

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

- T

)

Receiver designs using this filter include superhet with

Fax: (972) 387-8148

Fax: 44 1963 251510

Sym

FTC

|fA|

Notes

1, 2

3, 4

1,2

. The nominal frequency at any case temperature, T

Minimum

916.400

600

-40

Coilcraft 8.2 nH Chip Inductor

RFM RF1181

916.500

Typical

E-mail: info@rfm.com

http://www.rfm.com

RF1181-070102

0.032

750

. Note that insertion loss, bandwidth,

916.50 MHz

SAW Filter

RF1181

TO39-3 Case

916.600

Maximum

±100

1000

+85

test system with

Page 1 of 2

ppm/°C

ppm/yr

Units

MHz

kHz

°C

, may

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