RF1181B RF Monolithics, RF1181B Datasheet

RF1181B

Manufacturer Part Number

RF1181B

Description

Frequency = 916.5 ;; Description = RF Filter

Manufacturer

RF Monolithics

Datasheet

1.RF1181B.pdf (2 pages)

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Electrical Characteristics

Notes:

RF Monolithics, Inc.

RFM Europe

•

The RF1181B is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to pro-

vide front-end selectivity in 916.5 MHz receivers. Receiver designs using this filter include superhet with

10.7 MHz IF, direct conversion and superregen. Typical applications of these receivers are wireless remote-

control and security, data telemetry, and meter reading 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). 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.

Center Frequency at 25°C

Insertion Loss

3 dB Bandwidth

Rejection

Temperature

Frequency Aging

External Impedance

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

VSWR

width 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

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

[1 - FTC (T

Absolute Frequency

Tolerance from 916.50 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

Footprint

Sym

FTC

|fA|

Notes

1, 2

3, 4

. The nominal frequency at any case temperature, T

Minimum

916.400

500

-40

RFM RF1181B

11 to 15

Typical

2.5 to 10

E-mail: info@rfm.com

http://www.rfm.com

RF1181B-092001

916.5

0.032

600

4.0

. Note that insertion loss and band-

SAW Filter

916.5 MHz

RF1181B

SM8558-8 Case

Maximum

916.600

±100

800

+85

5.0

test system with

ppm/°C

Page 1 of 2

ppm/yr

Units

MHz

kHz

°C

, may

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