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©2010 by RF Monolithics, Inc.

SF2221A - 11/12/10

Electrical Specifications

Characteristic

Sym

Notes

Min

Typ

Max

Units

Nominal Center Frequency

1

193.60

MHz

Passband:

Minimum Insertion Loss, 192.9 to 194.3 MHz

8.0

9.0

dB

1 dB Bandwidth

1, 2

1.0

1.27

MHz

3 dB Bandwidth

1.4

1.82

MHz

3 dB Passband VSWR, Matched

2.2:1

3:1

Group Delay Variation, 192.9 to 194.3 MHz

GDV

300

500

Absolute Delay at 193.6 MHz

AGD

800

900

1000

ns

Rejection:

1, 2, 3

dB

191.8 and 195.4 MHz

25

30

Ultimate Rejection, <182.6 MHz, >204.6 MHz

45

50

Operating Temperature Range

10

+70

°C

• Precision IF SAW Filter

• Excellent Size-to-Performance Ratio

• Hermetic Surface-mount Case

• Single-ended Input and Output

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

Absolute Maximum Ratings

Rating

Value

Units

Maximum Incident Power in Passband

+18

dBm

Maximum DC Voltage Between any Two Terminals

30

VDC

Storage Temperature Range in Tape and Reel

-40 to +85

°C

Suitable for Lead-free Soldering - Maximum Soldering Profile

260°C for 30 s

193.60 MHz

SAW Filter

SF2221A

1.

Unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified demonstration board with

impedance matching to 50

Ω and measured with 50 Ω network analyzer.

2.

Unless noted otherwise, all frequency specifications are referenced to the nominal center frequency, fc.

3.

Rejection is measured as attenuation below the minimum IL point in the passband. Rejection in final user application is dependent on PCB layout

and external impedance matching design. See Application Note No. 42 for details.

4.

5.

The design, manufacturing process, and specifications of this filter are subject to change.

6.

Either Port 1 or Port 2 may be used for either input or output in the design. However, impedances and impedance matching may vary between Port

1 and Port 2, so that the filter must always be installed in one direction per the circuit design.

7.

US and international patents may apply.

Impedance Matching to 50

Ω Single-ended Source and Load

External L-C

Case Style

SM1154-14, 11.5 x 4 mm Nominal Footprint

Lid Symbolization (YY = year, WW = week)

SF2221A, YYWW

Pb

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

Preliminary

SM1154-14