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©2009 by RF Monolithics, Inc.

SF2188D - 2/5/09

Electrical Characteristics

Electrical Connections

Characteristic

Sym

Notes

Min

Typ

Max

Units

Nominal Center Frequency

1

339

340

341

MHz

Insertion Loss

IL

1

2.0

3.0

dB

1 dB Bandwidth

18

11

MHz

Passband Ripple, 336 to 344 MHz

1

0.4

1.0

Absolute Attenuation (referenced from 0 dB)

10 to 300 MHz

250

54

dB

300 to 320 MHz

240

47

dB

375 to 800 MHz

240

45

dB

Frequency Temperature Coefficient

-36

ppm/°C

Source Impedance

50

ohm

Load Impedance

50

ohm

Operating Temperature Range

-40

+85

°C

Case Style

SM3838-8 3.8 x 3.8 mm Nominal Footprint

Lid Symbolization (Y=year, WW=week, S=shift)

RFM 876 YWWS

Connection

Terminals

Port 1

2

Port 2

6

Case Ground

All others

SM3838-8

• No External Matching Required

• 3.8 x 3.8 x 1.4 mm Surface-mount Package

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

Absolute Maximum Ratings

Rating

Value

Units

Maximum Incident Power in Passband

+10

dBm

Maximum DC Voltage between any Two Terminals

3

VDC

Storage Temperature Range

-40 to +85

°C

Suitable for Lead-free Soldering - Maximum Soldering Profile

260°C for 30 s

340 MHz

SAW Filter

SF2188D

1.

Unless noted otherwise, all specifications apply over the operating temper-

ature 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 absolute attenuation (0 dB reference). Rejection

in final user application is dependent on PCB layout and external

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

4.

"LRIP" or "L" after the part number indicates "low rate initial production"

and "ENG" or "E" indicates "engineering prototypes."

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.

8.

RFM, stylized RFM logo, and RF Monolithics, Inc. are registered

trademarks of RF Monolithics, Inc.

Pb

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

5 .  & & ,

5 0 o h m

5 0 o h m

2

6

1 , 3 , 4 , 5 , 7 , 8