www.RFM.com E-mail: info@rfm.com

Page 1 of 3

©2008 by RF Monolithics, Inc.

SF1081A - 9/5/08

Electrical Characteristics

Characteristic

Sym

Notes

Min

Typ

Max

Units

Nominal Center Frequency

1

71.000

MHz

Passband

Insertion Loss at fc

IL

68.0

dB

3 dB Passband

1, 2

±100

±140

±200

kHz

Amplitude Ripple over fc±80 kHz

1.5

Group Delay Variation over fc±50 kHz

GDV

300

1000

Absolute Group Delay

GD

2.8

µs

Rejection

fc-600 to fc-400 and fc+400 to fc+600 kHz

1, 2, 3

25

26

dB

fc-1.0 to fc-0.6 and fc+0.6 to fc+1.8 MHz

35

40

69.6 to 70.0 MHz

40

45

31 to 69.6 and 71.8 to 111 MHz

35

50

Operating Temperature Range

1-5

+70

°C

Impedance Matching to 50

Ω unbalanced

External L-C

Case Style

SMP-87 22.1 X 8 mm Nominal Footprint

Lid Symbolization (YY=year, WW=week)

RFM SF1081A YYWW

SMP-87

• Designed for GSM BTS Receiver IF Applications

• Simple External Impedance Matching

• Hermetic SMP-87 Surface-Mount Case

• Unbalanced Input and Output

• Indoor-Temperature Version of SF1081A-1

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

Absolute Maximum Ratings

Rating

Value

Units

Maximum Incident Power in Passband

+10

dBm

Max. DC voltage between any 2 terminals

30

VDC

Storage Temperature Range

-40 to +85

°C

Suitable for lead-free soldering - Max Soldering Profile

260°C for 30 s

71.00 MHz

SAW Filter

SF1081A

1.

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

perature range with filter soldered to the specified demonstration board

with impedance matching to 50

Ω and measured with 50 Ω network ana-

lyzer.

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.

"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.

9.

©Copyright 1999, RF Monolithics Inc.

Electrical Connections

Connection

Terminals

Port 1Hot

1

Port 1 Gnd Return

10

Port 2 Hot

6

Port 2 Gnd Return

5

Case Ground

All Others

Pb

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes: